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Photography

for all lovers of photography.

Members: 64
Latest Activity: Dec 8, 2012

Archisage pic of the week contest

PREVIOUS WINNERS

Pic of the week 4 - Building with Light: by Ayesha Souza

Pic of the week 3 - An Old House: Goa by Vandana Naik

Pic of the week 2 - street: scholar's Avenue by Ankur Manchanda

Pic of the week 1 - window: Mashrabiya-Arabic Cliche by arnasheet


Discussion Forum

Equipment for architectural photography

Started by Vishal Charles. Last reply by onizu Aug 7, 2011. 3 Replies

For those with experience or interest in architectural photography, what's the ideal camera/lens setup in your opinion? Or does it really matter? I have seen professional photographers using a medium…Continue

Tags: lens, camera, photography

Photography vs CG

Started by Vishal Charles Jul 29, 2011. 0 Replies

CG is getting closer to reality but we can still pretty much differentiate a portrait of a real person from a computer generated one (…Continue

Tags: photography, cg

Photography Competitions

Started by Vishal Charles. Last reply by Vishal Charles May 12, 2010. 2 Replies

I'm starting this thread to post photography competitions and events. Please add if you know of any.To start:The New York Times Lens blog is inviting everyone to capture "image of one moment in time…Continue

Tags: photography, competitions

News

Neural network converts Game Boy Camera images into color photos

We've seen a lot of research lately that uses neural networks to upsample low resolution images and the results have been impressive – even a little creepy. Google recently showcased a system that can turn a low resolution 8x8 input image into a 32x32 sample that's remarkably close to the original image. Inspired by recent breakthroughs, research engineer Roland Meertens found another application for neural networks – one that's highly relevant to our interests. He created an application that turns low-res, monochrome Game Boy Camera images into photorealistic color images.

Original images in the center, Game Boy-ified images on the left and image generated by neural network on the right


A network must be trained, and training means feeding it input images. To create a training data set, Meertens gave some 'real life images' a Game Boy Camera treatment by re-creating them in four shades of black. By comparing the Game Boy-ified images with the originals, the network is 'taught' how to convert the images to color. With the network trained and ready, Meertens began testing it on celebrity photos as well as images from the Game Boy Camera (including the game's mysterious character at the top of the page).

Finally, Meertens uses the application on an image taken with the Game Boy Camera. Naturally, it should be a selfie, as it is here. If you have all of the necessary components, taking a photo with the Game Boy camera is easy. Getting it onto your computer is another story. Lacking a specialized cable, Meertens did his best to photograph the Game Boy screen. As a result the lighting is slightly uneven, which affects the output from the network, but the re-creation is still pretty darn cool. Our hats are off to him.

Sigma Announces 100-400mm F5-6.3 DG OS HSM lens

Sigma has announced the 100-400mm F5-6.3 DG OS HSM, a relatively compact and lightweight optically stabilized super-telephoto lens with with a dust and splashproof mount. The lens weighs 1160g/41oz, is 182mm/7.2in long, and the lens' front element has a 67mm diameter filter thread.

For zooming, the lens utilizes a standard twist mechanism, or the front of the lens can be pushed or pulled. It can focus down to 1.6m/5.2ft, and features a maximum magnification ratio of 1:3.8. The optical design comprises of 21 elements in 15 groups with four SLD (Special Low Dispersion) elements and a hypersonic motor with an updated algorithm.

Pricing will be announced at a later date.

Press Release

SIGMA 100-400mm F5-6.3 DG OS HSM

 Introducing the light bazooka-a new approach to the ultra-telephoto zoom

  1. Top performance with the specification and functionality of a more expensive unit
  2. Compact packaging with uncompromising image quality
  3. Push/pull zoom mechanism incorporated
  4. Telephoto plus macro functionality
  5. Other features 

A compact body and top performance in one complete package

An ultra-telephoto lens with an optical stabilizer (OS) system has several advantages. The OS allows the photographer to take photographs in unstable circumstances. The narrow angle of view makes it possible to dramatically compress perspective and flexible handling of the background. The photographer can thereby make the subject appear to jump out of the image, with the area in focus impressively sharp and clear. Nevertheless, ultra-telephoto lenses have traditionally had some disadvantages as well. As the nickname “bazooka” implies, they have tended to be big, heavy, and therefore burdensome to carry around. With the goal of creating an ultra-telephoto lens that is far more accessible, SIGMA incorporated all of its latest technologies into SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary. With its outstanding combination of optical performance and compactness, this is an ultra-telephoto lens that is a joy to carry and use. While keeping the robust functionality and exceptional image quality of an ultra-telephoto zoom lens intact, SIGMA has achieved amazingly compact packaging enclosing 400mm optics. Introducing the new and greatly enhanced “light bazooka” ultra-telephoto zoom lens.

SIGMA 100-400mm F5-6.3 DG OS HSM | Contemporary offers the compact size, lightweight, and high cost performance of a 70-300mm lens while delivering 400mm telephoto performance. This approach results in a tempting new ultra-telephoto choice for photographers. Offering a combination of stunning image quality and outstanding functionality, this lens satisfies the needs of pros and amateurs alike.

【Key features】

  1. Top performance with the specification and functionality of a more expensive unit

Since its release, the SIGMA 150-600mm F5-6.3 DG OS HSM | Contemporary has won photographers over with its strong fundamental performance and exceptional image quality. The new lens retains all of this performance in a compact 400mm ultra-telephoto zoom package with a filter size of just ⌀67mm and weight of just 1,160g. Yet it also comes with the full range of features and functions expected of an ultra-telephoto zoom: optical stabilizer (OS), hypersonic motor (HSM) with updated algorithm for fast autofocus, focus limiter, and more. In addition, this uncompromising specification becomes customizable with the available SIGMA USB Dock accessory.

  1. Compact packaging with uncompromising image quality

In designing this lens, SIGMA strived to push both compactness and image quality to the limit. Four SLD (Special Low Dispersion) glass lens elements and an optimized power distribution help minimize optical aberrations. Moreover, by taking special care to minimize transverse chromatic aberration, which cannot be corrected via aperture control, SIGMA has ensured outstanding image quality throughout the zoom range. 

  1. Push/pull zoom mechanism incorporated

For quick control of the angle of view, the zoom ring incorporates a push/pull mechanism in addition to the regular twist mechanism. The exclusive lens hood has also been designed to accommodate push/pull zooming and overall lens maneuverability. By making it possible to adjust the angle of view instantly, this lens gives photographers an even better chance of getting that crucial shot.

  1. Telephoto plus macro functionality

With a minimum shooting distance of 160cm and a maximum magnification ratio of 1:3.8, this lens can shoot either from a distance or up close. 

  1. Other features
  • Dust- and splash-proof mount

Since the area of the lens most vulnerable to dust and other foreign bodies is the mount, rubber sealing helps provide peace of mind.

  • All-new optical stabilizer (OS) unit with exclusive algorithm

Featuring a newly developed gyroscopic sensor and a new and exclusive algorithm, the all-new OS unit provides a powerful stabilization effect. An acceleration sensor detects camera shake in any direction—horizontal, vertical, or diagonal. This technology allows the OS to stabilize the image very effectively, regardless of whether the camera is being held in horizontal or vertical orientation.

  • Nikon electromagnetic diaphragm mechanism included

The Nikon mount version of this lens includes an electromagnetic diaphragm mechanism that allows it to receive the appropriate signals from the camera body. This feature ensures precision diaphragm control and stable Auto Exposure (AE) performance during continuous shooting.

Note: Functionality may be limited on some camera bodies. 

  • Rounded diaphragm 
  • Designed to minimize flare and ghosting
  • Compatible with the newly developed tele converters
  • Fast AF with full-time manual override

Note: The operation of full-time MF may vary based on mount type

  • Compatible with Mount Converter MC-11
  • Available SIGMA USB DOCK (Makes customization and flexible adjustment possible)
  • Available Mount Conversion Service (Allows use with another camera body)
  • High-precision, durable brass bayonet mount
  • Evaluation with SIGMA’s own MTF measuring system “A1”
  • Made in Japan (With outstanding craftsmanship)
  • The lens barrel is engraved with the year of release

Sigma 100-400mm F5-6.3 DG OS HSM | C specifications

Principal specifications
Lens type Zoom lens
Max Format size 35mm FF
Focal length 100–400 mm
Image stabilization Yes
Lens mount Canon EF, Nikon F (FX), Sigma SA Bayonet
Aperture
Maximum aperture F5–6.3
Minimum aperture F22
Aperture ring No
Number of diaphragm blades 9
Optics
Elements 21
Groups 15
Special elements / coatings Four SLD elements
Focus
Minimum focus 0.16 m (6.3)
Maximum magnification 0.26×
Autofocus Yes
Motor type Ring-type ultrasonic
Full time manual Yes
Focus method Internal
Distance scale No
DoF scale No
Physical
Weight 1160 g (2.56 lb)
Diameter 86 mm (3.4)
Length 182 mm (7.18)
Sealing Yes
Colour Black
Zoom method Push/Pull (extending)
Power zoom No
Filter thread 67.0 mm
Hood supplied Yes
Hood product code LH770-04
Tripod collar No
Other
Notes Rotating or push/pull zoom.

Sigma announces 14mm F1.8, 24-70mm F2.8 and 135mm F1.8 Art lenses

Sigma has released a trio of its high-end 'Art' lenses: two primes and one zoom. All three are designed for full-frame Canon, Nikon and Sigma bodies.

The first is the ultra-wide 14mm F1.8 DG HSM, which Sigma claims is the 'world's first and only F1.8 ultra-wide-angle lens.'  The lens has 16 elements, three of which are FLD (low dispersion) and four are SLD (super-low-dispersion). It also has a large (80mm) aspherical front element to reduce distortion and 'deliver outstanding image quality from the center to the edges.' The 14mm F1.8 has 9 rounded aperture blades, a minimum focus distance of 27cm/11in and a ring-type ultrasonic (HSM) focus motor.

Next up is the Sigma 24-70mm F2.8 DG OS HSM Art. This lens features three SLD and four aspherical, nine rounded aperture blades and optical image stabilization. The lens is weather-sealed and made of a combination of metal and 'thermally stable composite' material. The minimum focus distance of the 24-70 is 37cm/1.5in and it uses 82mm filters.

Last, but certainly not least, is the 135mm F1.8 DG HSM telephoto prime. Sigma says that this lens 'offers the [...] resolution required for 50MP or higher ultra-high-megapixel DSLRs.' It has a hypersonic (ring-type ultrasonic) focus motor that delivers fast (and 'exceptionally stable') focus speeds, while an acceleration sensor 'detects the orientation of the lens' so the AF system can respond to 'varying loads on the focusing group due to gravity.'

The lens has 9 rounded aperture blades, dust and splashproof construction, and a weight of 1130g/40.2oz.

Pricing and availability for all three lenses will be announced at a date to be determined.

Press Releases:

SIGMA 14mm F1.8 DG HSM
Introducing the world’s first and only* F1.8 ultra-wide-angle lens

A true high-speed lens that delivers a new dimension of visual experience

*Among interchangeable lens for digital SLRs as of February 2017

  1. 14mm ultra-wide angle of view and F1.8 brightness deliver a new dimension of visual experience
  2. Seventh 35mm full-frame prime lens to join the Art line
  3. Other features 

A true high-speed lens that delivers a new dimension of visual experience

In taking photographs of starry skies or other celestial scenes at night, or of the seashore with a wide perspective, a large-diameter lens is a strong ally, since it allows the capture of a moving subject by adjusting shutter speed without relying on ISO sensitivity. With its full-frame 35mm coverage, 14mm focal length for an ultra-wide angle of view, F2 barrier-breaking F1.8, the SIGMA 14mm F1.8 DG HSM | Art is the true high-speed ultra-wide-angle lens for which so many photographers have been waiting. Although some zoom lenses are available that can cover 14mm, the large diameter delivering F1.8 brightness is a singular advantage. Going beyond fast shutter speed, this lens can capture a swarm of fireflies with crystal clarity, a beautiful bokeh effect, and outstanding control of light streaking.

【Key features】

  1. 14mm ultra-wide angle of view and F1.8 brightness deliver a new dimension of visual experience

By leveraging its extreme angle of view and the dramatic perspective this creates, an ultra-wide-angle lens can get up close and personal with a subject while at the same time taking in a vast background—an example of photography going beyond normal human vision.

SIGMA 14mm F1.8 DG HSM | Art combines the extremely deep depth of field that comes from an ultra-wide angle of view with the extremely shallow depth of field that comes from F1.8 brightness. The result is a sharply captured subject set against a vast background dramatically blurred with a beautiful bokeh effect. It is a highly impressive mode of photographic expression that until now simply has not existed.

  • Minimized chromatic aberrations

Three FLD (“F” Low Dispersion) glass elements and four SLD (Super Low Dispersion) glass elements help minimize transverse chromatic aberration, which tends to be noticeable in shots taken with ultra-wide-angle lenses. The result is outstanding image quality from the center of the image to the edges.

  • Featuring a large-diameter aspherical lens element

The SIGMA 12-24mmF4 DG HSM | Art was the first SIGMA lens to feature a large ⌀80mm aspherical lens element. Building on the expertise derived from this success, the new lens features a large ⌀80mm precision-molded glass aspherical lens as its front element. This technology has made possible the 14mm F1.8 specification—the first of its kind.

  • Minimized distortion

Serving as the front lens element, the large ⌀80mm precision-molded glass aspherical lens effectively minimizes distortion. Offering excellent peripheral brightness, this lens delivers outstanding image quality from the center to the edges.

  • Distinctive bokeh effect

Even at the 14mm ultra-wide-angle of view, F1.8 brightness makes possible a very shallow depth of field with the subject standing out dramatically against a bokeh background. It’s the unique mode of expression that only a large-diameter lens can deliver. 

  1. Seventh 35mm full-frame prime lens to join the Art line

Launched in 2012, the SIGMA 35mm F1.4 DG HSM | Art was the first lens in the Art line. Since then, SIGMA has developed a wide variety of lenses for the line, and the SIGMA 14mm F1.8 DG HSM | Art is the seventh prime lens in the line to offer 35mm full-frame coverage. Now even stronger, the Art line sets the new standard for prime lenses in the ultra-high-megapixel era.

  1. Other features
  • Fast AF with full-time manual override

Note: The operation of full-time MF may vary based on mount type

  • Compatible with Mount Converter MC-11
  • Available SIGMA USB DOCK (Makes customization and flexible adjustment possible)
  • Available Mount Conversion Service (Allows use with another camera body)
  • Rounded diaphragm
  • Designed to minimize flare and ghosting
  • High-precision, durable brass bayonet mount
  • Evaluation with SIGMA’s own MTF measuring system “A1”
  • Made in Japan (With outstanding craftsmanship)
  • The lens barrel is engraved with the year of release

SIGMA 24-70mm F2.8 DG OS HSM
Top-level performance optimized for the era of ultra-high-megapixel cameras

  1. The large-diameter standard zoom ideal for today’s ultra-high-megapixel digital cameras
  2. OS functionality and newly designed HSM for success on any shoot
  3. Lens barrel designed for high rigidity
  4. Other features 

The definitive large-diameter standard zoom lens for any shoot

What photographers demand from the 24-70mm F2.8 specification is much more than outstanding image quality. They want all the features that make this a go-to lens for a wide range of photographic opportunities, including optical design ideal for the latest ultra-high-megapixel digital cameras, hypersonic motor (HSM) for high-speed autofocus, optical stabilizer (OS) with powerful stabilization effect, dust- and splash-proof mount with rubber sealing, and a metal barrel for a stable, rigid feel. This all-new 24-70mm F2.8 lens from SIGMA delivers the performance and functionality that help pros succeed in news, nature, and many other fields of photography.

【Key features】

  1. The large-diameter standard zoom ideal for today’s ultra-high-megapixel digital cameras 
  • Outstanding optical performance

Three SLD (Special Low Dispersion) glass lens elements and four aspherical lens elements help minimize optical aberrations. To ensure outstanding image quality from the center to the edges of the photograph, the optical system minimizes coma, which causes points of light to streak, and transverse chromatic aberration, which cannot be corrected via aperture control, The optical system also minimizes distortion, which can be particularly evident in wide-angle shots, resulting in excellent optical performance throughout the zoom range.

  • A 24-70mm F2.8 lens that meets the high standards of the Art line

SIGMA has continuously pioneered 24-70mm F2.8 lenses that are a step ahead of the times. The first model of this specification, SIGMA 24-70mm F2.8 EX DG ASPHERICAL DF, launched in 2001. Representing the fourth generation of the family, the new SIGMA 24-70mm F2.8 DG OS HSM | Art accomplishes a challenging feat in optical design: incorporating optical stabilizer functionality in a large-diameter standard zoom. By leveraging all of its design and manufacturing expertise, SIGMA has ensured that this new lens fulfills the uncompromising requirements of the Art line for image and build quality.

  • Bokeh that is a cut above

At wide-open aperture, this lens offers outstanding photographic expression. The area in focus is extremely sharp, while the background exhibits a beautiful bokeh effect with only slight spherical aberration. Since large-diameter zoom lenses are often used at wide-open aperture, SIGMA has paid close attention to the shape of the bokeh, aiming for perfect circularity. 

  • Incorporating advanced aspherical lens processing technology

Aspherical lenses necessitate refined expertise in the design and manufacturing of advanced, high-performance lenses. SIGMA’s first products to feature this technology were the SIGMA 12-24mm F4 DG HSM | Art and SIGMA 14mm F1.8 DG HSM | Art, which both incorporated a large ⌀80mm aspherical lens as their front lens element. Building on the success of these predecessors, the SIGMA 24-70mm F2.8 DG HSM | Art incorporates an aspherical lens element that helps achieve extremely high resolution. This element is much thicker at the center than the edges, and forming its unusual shape is a feat of manufacturing technology. Moreover, SIGMA processes the surface of this aspherical lens element with ultra-precise tolerances that are measured in hundredths of a micrometer. This extremely fine surface allows the SIGMA 24-70mm F2.8 DG HSM | Art to deliver a very natural and smooth bokeh effect, without the visible concentric rings that afflict typical aspherical lens elements.

  1. OS functionality and newly designed HSM for success on any shoot

Designed for advanced utility in a wide variety of situations, the optical stabilizer (OS) offers a powerful stabilization effect. The newly designed large hypersonic motor (HSM) offers 1.3 times the torque of its predecessor and exceptionally stable performance even at lower speeds.

* Based on CIPA's guideline. Measuring at telephoto end, when it is attached to the camera with 35mm image sensor.

  1. Lens barrel designed for high rigidity

Since large-diameter standard zoom lenses tend to serve as a go-to lens and see frequent use, the SIGMA 24-70mm F2.8 DG HSM | Art is designed to stand up to the challenging shooting environments that pros encounter. To this end, the lens barrel contains a large amount of metal, while the external moving parts feature thermally stable composite (TSC), which is resistant to thermal expansion and contraction. This structure contributes not only to the outstanding optical performance of the lens but also to its high rigidity and confidence-inspiring build quality.

  1. Other features
  • Mount with dust- and splash-proof design

Since the area of the lens most vulnerable to dust and other foreign bodies is the mount, rubber sealing helps provide peace of mind. In addition, the front lens element features a water- and oil-repellent coating that helps the lens perform well in the rain, near water, and in other challenging conditions.

  • Nikon electromagnetic diaphragm mechanism included

The Nikon mount version of this lens includes an electromagnetic diaphragm mechanism that allows it to receive the appropriate signals from the camera body. This feature ensures precision diaphragm control and stable Auto Exposure (AE) performance during continuous shooting.

Note: Functionality may be limited on some camera bodies.

  • Fast AF with full-time manual focus
  • Compatible with Mount Converter MC-11
  • Available SIGMA USB DOCK (Makes customization and flexible adjustment possible)
  • Available Mount Conversion Service (Allows use with another camera body)
  • Rounded diaphragm
  • Designed to minimize flare and ghosting
  • High-precision, durable brass bayonet mount
  • Evaluation with SIGMA’s own MTF measuring system “A1”
  • Made in Japan (With outstanding craftsmanship)
  • The lens barrel is engraved with the year of release

SIGMA 135mm F1.8 DG HSM
With F1.8 brightness, this telephoto lens for full-frame cameras further strengthens the Art line’s prime options

  1. The ultimate 135mm telephoto designed to prioritize optical performance
  2. Fast and nimble autofocus photography
  3. Sixth 35mm full-frame prime lens to join the Art line
  4. Other features  

Introducing the ultimate 135mm telephoto featuring top-level performance

135mm telephoto lenses are often categorized as the foundational telephoto, the first one to add to a lens collection. This focal length delivers a strong perspective compression effect, while the large diameter with F1.8 brightness provides a dramatic bokeh effect. By minimizing axial chromatic aberration, the SIGMA 135mm F1.8 DG HSM | Art makes this bokeh effect not only impressive but also beautiful while delivering superb contrast and sharp image quality in every shot. It offers the outstanding resolution required for 50MP or higher ultra-high-megapixel DSLRs. By incorporating its latest innovations in design and optical glass and rethinking every aspect of the lens, SIGMA has ensured outstanding image quality all the way to the edges, establishing the new standard in 135mm telephoto lenses.

With resolution so crystal-clear that individual hairs can be discerned in a portrait, this large-diameter lens also delivers a beautiful bokeh effect, giving photographers everything they need. It is ideal for close-ups and full-body shots, with subjects standing out against a pleasantly blurred background. In addition to standard portraits, including bridal shots, this lens is a top performer for live events, with its super-fast autofocus capturing subjects with ease.

【Key features】

  1. The ultimate 135mm telephoto designed to prioritize optical performance
  • Image quality optimal for ultra-high-megapixel DSLRs

To deliver the ultra-high resolution that brings the best out of 50MP or higher ultra-high-megapixel DSLRs, the focus mechanism features SIGMA’s floating system. No matter what the distance from the subject, this lens offers top performance from the center to the edges of the image. By minimizing distortion as well, the lens delivers impeccable image quality—no need for digital adjustment during image processing.

  • Ideal for portraits requiring a dramatic bokeh effect

The 135mm focal length delivers a stunning compression effect: even fairly close to the subject, the telephoto ring allows the photographer to establish a variety of dramatic perspectives. The compression effect truly shines in both close-ups and full-length portraits, making composition easy. Moreover, the large diameter with F1.8 brightness makes possible a body shot with an impressive bokeh background. In sum, this lens puts a full menu of compositional options at the photographer’s fingertips.

  1. Fast and nimble autofocus photography

The large hypersonic motor (HSM) offers two benefits. It delivers ample torque to the focusing group for outstanding speed, ensuring exceptionally stable performance even at lower speeds. The acceleration sensor detects the orientation of the lens, allowing the autofocus system to respond to varying loads on the focusing group due to gravity. Along with the optimized AF algorithm, these features deliver fast autofocus photography. In addition, the focus limiter makes AF highly responsive to distance from the subject for even more nimble performance.

  1. Sixth 35mm full-frame prime lens to join the Art line

Launched in 2012, the SIGMA 35mm F1.4 DG HSM | Art was the first lens in the Art line. Since then, SIGMA has developed a wide variety of lenses for the line, and the SIGMA 135mm F1.8 DG HSM|Art is the sixth prime lens in the line to offer 35mm full-frame coverage. Now even stronger, the Art line sets the new standard for prime lenses in the ultra-high-megapixel era.

  1. Other features 
  • Fast AF with full-time manual override

Note: The operation of full-time MF may vary based on mount type

  • Compatible with Mount Converter MC-11
  • Mount with dust- and splash-proof construction
  • Nikon electromagnetic diaphragm mechanism included
  • Available SIGMA USB DOCK (Makes customization and flexible adjustment possible)
  • Available Mount Conversion Service (Allows use with another camera body)
  • Rounded diaphragm
  • Designed to minimize flare and ghosting
  • High-precision, durable brass bayonet mount
  • Evaluation with SIGMA’s own MTF measuring system “A1”
  • Made in Japan (With outstanding craftsmanship)
  • The lens barrel is engraved with the year of release

Sigma 14mm F1.8 DG HSM / 135mm F1.8 DG HSM specifications

  Sigma 14mm F1.8 DG HSM Art Sigma 135mm F1.8 DG HSM Art
Principal specifications
Lens type Prime lens
Max Format size 35mm FF
Focal length 14 mm 135 mm
Image stabilization No
Lens mount Canon EF, Nikon F (FX), Sigma SA Bayonet
Aperture
Maximum aperture F1.8
Minimum aperture F16
Aperture ring No
Number of diaphragm blades 9
Optics
Elements 16 13
Groups 11 10
Special elements / coatings Three FLD and four SLD elements
Focus
Minimum focus 0.27 m (10.63) 0.88 m (34.65)
Maximum magnification 0.1× 0.2×
Autofocus Yes
Motor type Ring-type ultrasonic
Full time manual Yes
Focus method Internal
Focus notes Floating focus mechanism
Distance scale Yes
DoF scale No
Focus distance limiter No Yes
Physical
Weight 1170 g (2.58 lb) 1130 g (2.49 lb)
Diameter 95 mm (3.76) 91 mm (3.6)
Length 126 mm (4.96) 115 mm (4.52)
Sealing Yes
Colour Black
Filter thread 82.0 mm
Hood supplied Yes
Tripod collar No

Sigma 24-70mm F2.8 DG OS HSM specifications

Principal specifications
Lens type Zoom lens
Max Format size 35mm FF
Focal length 24–70 mm
Image stabilization Yes
Lens mount Canon EF, Nikon F (FX), Sigma SA Bayonet
Aperture
Maximum aperture F2.8
Minimum aperture F22
Aperture ring No
Number of diaphragm blades 9
Optics
Elements 19
Groups 14
Special elements / coatings Three HLD and four aspherical elements
Focus
Minimum focus 0.37 m (14.57)
Maximum magnification 0.21×
Autofocus Yes
Motor type Ring-type ultrasonic
Full time manual Yes
Focus method Internal
Distance scale Yes
DoF scale No
Physical
Diameter 88 mm (3.46)
Length 108 mm (4.24)
Materials Metal
Sealing Yes
Colour Black
Zoom method Rotary (extending)
Power zoom No
Zoom lock No
Filter thread 82.0 mm
Hood supplied Yes
Hood product code LH876-04
Tripod collar No

Comment Wall

Comment

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Architect
Comment by Vishal Charles on August 6, 2011 at 5:54pm
Red Epic with Canon 600mm :)

One Degree from Vincent Laforet on Vimeo.

Comment by Robert P Fryer on July 13, 2011 at 11:43pm
Great shot he has skills

Architect
Comment by Vishal Charles on July 13, 2011 at 11:22pm
Comment by ghanizaman on May 12, 2010 at 7:59am
Start Time:
Saturday, May 29, 2010 at 10:00am
End Time:
Wednesday, June 2, 2010 at 8:00pm
Location:
Orissa Modern Art Gallery.
Description
'Live More' in association with 'foto-n-man associates' presents "Bhubaneswar 24 hours" - a photography exhibition cum workshop.

Master the art of photography!

Overcome the challenge as our experts show you how to create dramatic, phenomenal effects with the camera.

Capture Bhubaneswar, 24 hours around the clock with your camera and also get a chance to exhibit your masterpieces in a citywide exhibition.

Day 1: Photography Workshop-I.
Day 2: Photography Workshop-II.
Day 3: Citywide Assignment "Bhubaneswar 24 hours'
Day 4: Openhouse Exhibition for Public.
Day 5: Openhouse Exhibition for Public.

#Per Participant Rs.900*/-


For bookings call: 9776329113.

You can also register at our website: www.LiveMore.co.in

Architect
Comment by Vishal Charles on May 12, 2010 at 4:50am
Comment by Nadine Rainwater on April 27, 2010 at 4:51pm
nice, i like iphone but have no_
Comment by Nadine Bouler on April 25, 2010 at 7:29pm
http://www.evereverse.com/topic/blog-post/-- iPhone photo contest might be of interest.
Comment by ghanizaman on April 20, 2010 at 6:56pm
Of course I am interested. We need to find a few good sponsors. A good line up of Judges and a hardworking and creative marketing group.
Comment by Robert P Fryer on April 20, 2010 at 6:10am
Archisage should have a Photography Competition, any interest ?
Comment by FLORY on April 20, 2010 at 5:41am
would you like to join my first giveaway--a photo print of your choice... here's my blog link:

http://www.florysphotography.com/2010/04/my-summer-giveaway-is-here...
come and join the fun!
Flory
 
 
 

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