Product Description

UV filter cuts haze for sharper black and white prints and corrects the blues and violets in color prints. The multi-coated reduce reflection and is designed to be used with multi-coated lenses to protect and reduce excess UV. Multi coated UV filter designed for outdoor photo, portrait photo and snap shot photo. UV filter has a filter factor of zero and requires no change in exposure. ... Read more

Features

• Eliminates haze.
• Serves as a lens protector.
• Multi Coated for flare prevention

Product Description

UV filter cuts haze for sharper black and white prints and corrects the blues and violets in color prints. The multi-coated reduce reflection and is designed to be used with multi-coated lenses to protect and reduce excess UV. Multi coated UV filter designed for outdoor photo, portrait photo and snap shot photo. UV filter has a filter factor of zero and requires no change in exposure. ... Read more

Features

• Eliminates haze.
• Serves as a lens protector.
• Multi Coated for flare prevention

Features

• Number of blades in diaphragm: 6
• Angle of View: 84.1 degrees -34.3 degrees
• Lens Constructions: 8 Groups 11 Elements
• Mount: Nikon AF
• Minimum Aperture: f22-38

Product Description

Enjoy the benefits if of a Large Aperture f2.8 Wide Zoom Lens with Focal lengths from 20mm, as Sigma has now added a new 20-40mm f2.8 EX Aspherical DG DF lens to the EX DG lens group. This 20-40mm f2.8 EX Aspherical DG DF lens provides f2.8 large maximum aperture for all focal lengths between ultra-wide angle 20mm to 40mm. The lens has minimum focus distance of 11.8 inches (30cm) at all focal lengths and maximum magnification is 1: 4.6.It incorporates aspherical lenses in the front lens group and rear lens group to minimize distortion, astigmatism and spherical aberration. The lens is equipped with a DF (Dual Focus) mechanism and also an IF (Inner Focus) system. It is easy to hold the lens during shooting, since the focusing ring does not rotate during auto focusing, and yet it provides adequate dampening of the focusing ring during manual focusing of the lens.This lens is designed to be desirable for both digital SLR cameras and conventional 35mm SLR camera.Sigma's new 20-40mm f2.8 EX Aspherical DG DF lens is equipped with a removable type lens hood (Petal shaped hood) to prevent extraneous light harmful for image quality. ... Read more

Features

• Mount: Minolta AF
• Lens Constructions: 13 Groups 17 Elements
• Angle of View: 94.5 degrees -56.8 degrees
• Number of blades in diaphragm: 9
• Minimum Aperture: 32

Features

• 70-200mm Focal length
• Aperture of f2.8
• Minimum focusing distance of70.9 inches
• 77mm Filter Size
• Magnifications 1:7.8

Amazon.com Product Description

The Sigma 500mm f4.5 EX HSM APO ultratelephoto lens incorporates two extraordinary low dispersion (ELD) glass elements, which help reduce chromatic aberration to the minimum limit. With a fast f4.5 aperture, this apochromatic lens also incorporates an internal focusing system to give you fast, responsive autofocus speed. The ultraquiet hypersonic motor (HSM) lets you shoot pictures without disturbing your subjects. Polarizing filters are extremely easy to use with this lens because of its rotary filter holder, located in the rear part of the lens barrel. The optic materials are lead-free and arsenic-free ecological glass. This model is dedicated to Canon AF SLR cameras. ... Read more

Features

• Dedicated to Canon AF SLR cameras
• Uses an ultraquiet hyper-sonic motor (HSM)
• Two extraordinary low dispersion (ELD) glass elements, which help reduce chromatic aberration
• Optic materials are lead- and arsenic-free ecological glass
• Rear rotary filter holder for easy use of polarizing filters

Reviews (2)

Other choices are better
Similar considerations apply to Canon, so here is what I said about the 500mm f4.5 Sigma vs similar glass from Nikon:

The Sigma gets decent reviews, but for the same price you can get a brand-new 400mm f3.5 Nikkor (or a used 500mm f4P Nikkor). THese are sharper, faster, and (IMPORTANT!) better-built. Add a TC-14b teleconverter for about 10% more and you also have a 560mm f5 (or 700mm f5.6) that is sharper than the Sigma. A used 400mm f3.5 Nikkor is maybe $1500 to $2000 (this is the choice most people should make, but be sure you can return it if it's a clinker).

A BIGGIE: The resale value of the Nikkor is much better. I could (but never will) sell my Nikkors (bought used) for more than I paid after using them for years.

The only "advantage" of the Sigma is Autofocus, which may not work all that well if other reviewers' comments or my experience with a Sigma 400mm f5.6 are any indication. However, if you are a high-end sports freak or flying bird weenie, you already own high-end AF gear, or will be frustrated until you do. Most other subjects don't need AF. Indeed, in a recent butterfly hunt in a wildflower plot, I got consistently better slides in manual mode than an experienced friend with new Nikon AF gear. It's pretty tricky to get the AF to focus on the butterfly's head instead of its back wing or the flower petals.

Also, the 500mm Sigma weighs almost 7 lb, more than the far more versatile Nikkor + TC-14b combination. (A 400mm f2.8 AF Nikkor weighs 14 lb! What price AF?)

Bottom line: Buy the good stuff -- you get better performance and save money (because of resale value).

User experience with Sigma 500/4.5 EX HSM
I am a wildlife photographer in South Africa and I briefly owned both the Nikon and Canon versions of this lens. I used the lens on a Nikon F100 body and found that it did not autofocus properly, due to presumably software conflict between the lens and the body. I swopped it for the Canon version, but it had the same problem when used with the EOS 3. The Nikon version did not autofocus with the Sigma 1.4 and 2.0 APO extenders. The Canon version did focus with the Sigma 1.4 extender, but not with the 2.0. THe lens has exceptionally good optics, and resolution, contrast and colour saturation is excellent. The build-quality is not bad, but not up to the same standard as the equivalent Canon lens. The large tripod mount is very handy, and the lens is very well balanced when used on a tripod. THe lens is very well priced, but unless Sigma ensures that it functions perfectly with the latest top end Canon and Nikon SLR's, it will not be an option for pro's or serious amateurs. ... Read more

Features

• Two special low-dispersion glass elements in the front lens group, in addition to a special low-dispersion glass element in the rear lens group
• Dedicated to Nikon AF SLR cameras
• Ultra-telephoto, telephoto, and macro photography all in one lens
• High magnification of 1:2 (one-half life-size) for macro photography
• Lens constructed of an ecological, lead- and arsenic-free glass

Features

• 80-400mm focal length
• Aperture of F4.5-5.8
• Minimum focusing distance of 70.8 inches
• Zoom Lock Switch that eliminates "Zoom Creep"
• Two optical stabilizer modes to compensate for image blurring

Product Description

Enjoy the benefits if of a Large Aperture f2.8 Wide Zoom Lens with Focal lengths from 20mm, as Sigma has now added a new 20-40mm f2.8 EX Aspherical DG DF lens to the EX DG lens group. This 20-40mm f2.8 EX Aspherical DG DF lens provides f2.8 large maximum aperture for all focal lengths between ultra-wide angle 20mm to 40mm. The lens has minimum focus distance of 11.8 inches (30cm) at all focal lengths and maximum magnification is 1: 4.6.It incorporates aspherical lenses in the front lens group and rear lens group to minimize distortion, astigmatism and spherical aberration. The lens is equipped with a DF (Dual Focus) mechanism and also an IF (Inner Focus) system. It is easy to hold the lens during shooting, since the focusing ring does not rotate during auto focusing, and yet it provides adequate dampening of the focusing ring during manual focusing of the lens.This lens is designed to be desirable for both digital SLR cameras and conventional 35mm SLR camera.Sigma's new 20-40mm f2.8 EX Aspherical DG DF lens is equipped with a removable type lens hood (Petal shaped hood) to prevent extraneous light harmful for image quality. ... Read more

Features

• Mount: Nikon AF
• Lens Constructions: 13 Groups 17 Elements
• Angle of View: 94.5 degrees -56.8 degrees
• Number of blades in diaphragm: 9
• Minimum Aperture: 32

Amazon.com Product Description

This fish-eye lens is designed to capture a 180-degree view in a 22mm diameter circular image. Even familiar subject matter can be given startlingly fresh creative expression through this exaggerated perspective that creates unusual distortion effects. In addition to creative expression, this lens can be used for academic or technical applications that involve solid angle measurements. An example would be capturing the angle of view through a window with a driver in a car or a pilot in the cockpit of an airplane. This lens accepts removable gelatin filters in a rear holder. The optical materials are made from lead-free and arsenic-free ecological glass. This lens is dedicated to Pentax AF SLR cameras. ... Read more

Features

• Dedicated to Pentax AF SLR cameras
• Capture a 180-degree view on a 22mm diameter circular image
• Can be useful for academic or technical applications that involve solid angle measurements
• Accepts removable gelatin filters in a holder near the rear of the lens
• Lens constructed with lead-free, arsenic-free ecological glass

Features

• Zoom lens with Nikon-D AF mount
• Special low-dispersion glass for high image quality
• 28 to 70 mm focal length
• f2.8 maximum aperture
• Inner focusing system allows add-on hoods and filters

Features

• Dedicated to Pentax AF SLR cameras
• Ultra-telephoto, telephoto, and macro photography all in one lens
• High magnification of 1:2 (one half life-size) for macro photography
• Lens constructed of an ecological, lead and arsenic-free glass
• 14 elements in 10 groups

Reviews (1)

great little zoom
The zoom range and macro mode make it a very useful all-around tele-photo lens. I have taken some very sharp macro shots and have had no problem with vignetting.

My interest is urban wildlife and this lens can cover just about all my needs. Its range and macro mode make it the lens I keep on my camera. I use a manual SLR and have not had a chance to test the auto-focus. ... Read more