Sigma Super Wide Angle 20mm f/1.8 EX Aspherical DG DF RF Autofocus Lens for Pentax AFSuper Wide Angle 20mm f/1.8 EX Aspherical DG DF RF Autofocus Lens for Pentax AF Read More
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Sigma 20mm f/1.8 EX DF RF Aspherical Wide Angle Lens for Sigma SLR Cameras
( Weight: 1.2lb )
Sigma 20mm f1.8 EX DG Aspherical RF is one of several EX Series lenses. It is the first 20mm Super wide-angle lens in the world with a large aperture of F1.8 and angle of view 94.5{degrees}. It has Macro focusing capability with a minimum focusing distance of 20cm/7.9inches (reproduction ratio 1:4). The iris diaphragm has 9 diaphragm blades to obtain beautiful out of focus image. It incorporates an aspherical lens element in the front as well as rear lens groups, to minimize distortion, spherical aberration and astigmatism. The lens has non-vignetting optical construction, in order to obtain adequate peripheral brightness with open aperture. This is especially desirable for digital cameras. The lens incorporates a rear focus system eliminating front lens rotation, thus allowing the use of a Perfect Hood and easy use of polarizing filters. The lens also incorporates dual-focus mechanism. It is easy to hold the lens, since the focusing ring does not rotate during auto-focus, yet it provides adequate focusing torque of the focusing ring during manual focusing of the lens. The lens materials used in this lens are lead and arsenic free ecological glass.
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| Seller | Seller Rating | Additional Info | List Price | Tax & Shipping | Total Price |
|---|---|---|---|---|---|
| B&H Photo-Video |
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New | $629.00 | ||
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User Reviews for Sigma 20mm f/1.8 EX DF RF Aspherical Wide Angle Lens for Sigma SLR Cameras
Average review rating(based on 10 reviews)
(based on 10 reviews)
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Posted:
August 16 2010
review from Amazon User
Pros & Cons :i can tell you the quality is top notch - well built, very sharp images across the field, easy to use and transport.
Sigma 20 mm for Astrophotography
...I purchased the Sigma 20mm f/1.8 lens, mainly for wide field astrophotography purposes. I refuse to pay what Canon was asking for a comparable lens...this Sigma lens costs less than half of what ... read more
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Posted:
October 29 2009
review from Amazon User
Pros & Cons :it does focus quite closely, and the large focusing ring is pleasant to use.
fairly good
...There is little vignetting at f4.0 on the sigma, but the vignetting at f 1.8 is fairly marked.I am not sure of the best use of this unique lens. I bought it for nighttime photography of the conste ... read more
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Posted:
July 23 2009
review from Amazon User
Pros & Cons :that's a clever design and is nice if you do a lot of switching between manual and autofocus, because you don't have to look at the lens to find the little switch like you do on most lenses.
very nice lens
...It works well on both of my cameras and produces sharp photos with good color and contrast. I have 2 issues with the lens. Autofocus is rather slow and the lens switch for manual/autofocus is the ... read more
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Posted:
July 4 2009
review from Amazon User
Pros & Cons :my copy provides useable 8x10" prints at f/1.
...I really can't fault this lens for what it is not - after considering its modest price tag. Sure it's not a Canon 24/1.4L and it's not exactly sharp wide open on a full-frame DSLR. For less than ... read more
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Posted:
April 15 2009
review from Amazon User
Pros & Cons :it worked equally well for candid portaits and any kind of landscape photos on the sony, i was surprised how much wider it felt than the standard 24-xx mm zoom lenses, and the quality was always miles ahead.
...This was almost always the lens of choice for me on my Sony Alpha A100. I cannot comment on it's capibilities for full-frame cameras, but for almost all Sony/Minolta digital users, this will not b ... read more
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Posted:
January 8 2009
review from Amazon User
Pros & Cons :if i had to decide again, i'd probably opt for the 24mm or possibly even the 28mm - the effective focal lengths would be a little more practical for my purposes.
...From what I've heard, you have to spend the cash for one of the Pentax limited lenses to get the same quality in an auto focus lens as with their old -M and -A glass. So, for about half the price ... read more
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Posted:
March 28 2008
review from Amazon User
Pros & Cons :i typically use prime lenses for shooting indoor shots and this is one of the best, because of the wide angle (30mm equivalent), sharpness, and speed.
...I typically use prime lenses for shooting indoor shots and this is one of the best, because of the wide angle (30mm equivalent), sharpness, and speed. No other wide lens has the speed of this one ... read more
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Posted:
January 8 2007
review from Amazon User
Pros & Cons :it's fast max aperture and close focusing make it indispensable to me.
...I've taken it out in the rain and snow and hail and the fact that it failed only recently attests to the build of this fine lens.Buy it while they still make it! I may buy a backup soon for this ... read more
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Posted:
May 7 2006
review from Amazon User
Pros & Cons :i consider this lens to be an extremely good value at the retail price, new.
...Also, popular photography magazine online reviewed this lens, as well as the 24 f1.8 and the 28 f1.8, very highly.I would highly recommend this lens to anyone who wants a fast, sharp superwide ang ... read more
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Posted:
September 26 2005
review from Amazon User
Pros & Cons :i get the feeling that sigma must be a worthy canon competitor in regard to the quality of their lenses, but i can't base that on having owned only one sigma lens.
...Great performance! I do not think that I have had a picture come out anything less than sharp using this lens! This is the only Sigma brand lens I own; all my others are Canon brand. I get the fee ... read more
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Product Specs for Sigma 20mm f/1.8 EX DF RF Aspherical Wide Angle Lens for Sigma SLR Cameras
| Category: | Electronics |
|---|---|
| Brand: | SIGMA |
| Label: | SIGMA |
| Manufacturer: | SIGMA |
| Model: | 411-110 |
| Product Group: | Photography |
| Release Date: | 2006-05-04 |
| Height: | 3 in. |
| Weight: | 1 lbs |
| Length: | 3 in. |
| Width: | 3 in. |
| Fragile: | No |
| Maximum Focal Length: | 20 (mm.) |
| Minimum Focal Length: | 20 (mm.) |
| Part Number: | 411-110 |
| Weight: | 1.2 lb |
| Focal Length: | 20 mm |
| Product Type: | aspherical lens |
| Product Type: | camera lens |
| Product Type: | wide angle lenses |
| Top Brands: | Sigma |
| UPC: | 085126411404 |
| ASIN: | B00009N5IO |
See item at:
B&H Photo-Video:
$629.00
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