Sigma 30mm f/1.4 EX DC Lens for Pentax and Samsung Digital SLR Cameras
by SIGMA
Our Price: $489.00
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Category: Digital Camera
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Digital Photo Product Details
Manufacturer: SIGMARelease Date: 2006-05-04
Model: B000FG6CME
Product features:
- Large Maximum Aperture of F1.4
- The most appropriate coating for digital SLR cameras
- Two SLD (Special Low Dispersion) glass elements and an hybrid aspherical lens, provides the utmost correction for all types of aberrations
- Fully compatible with all Pentax Digital SLR cameras
- Dolica CF9-ND62 62mm 0.9ND 8X Neutral Density Filter
- Dolica CF-C62 62mm CPL Filter
- Dolica CF3-ND62 62mm 0.3ND 2X Neutral Density Filter
- Dolica CF-U62 62mm UV Filter
- AmazonBasics Lens Pen Cleaning System
Digital Cameras Photo Reviews of Sigma 30mm f/1.4 EX DC Lens for Pentax and Samsung Digital SLR Cameras
Customer Review: Why don't Canon/Nikon make a lens of this focal length and aperture?
Summary: 5 Stars
Pros:
Center and large aperture performance
Standard field of view for APS-C cameras
Build quality
Value
Cons:
Poor corner performance
Bottom Line: This lens is the perfect focal length for APS-C. A 35mm lens on APS-C always seems not quite wide enough, and 28mm a little too wide. This Sigma at 30mm (I measured it at 31mm) fits nicely in between. It offers a large aperture for available light shooting, with excellent center performance wide open. If the corners were better it would be perfect.
I am using this lens for Pentax mount on my K-7 (note: the review page doesn't distinguish between lens mounts for this item). Focus has been extremely accurate, even wide open. I have no issue using any of the focus points. I don't know if I was lucky and received a good sample or if the Pentax K-7's special focus sensor that adjusts focus accordingly to light type (tungsten, daylight, etc) makes an improvement, all I know is that it works well.
For the Pentax mount the lens is screw drive and not HSM. The downside is it doesn't offer full time manual/quick shift like other HSM lenses, and the focus ring turns during AF operation. There is no manual/auto selector for Pentax mount like the image shows.
Corner performance is acceptable for portraiture work and anything where corner sharpness is not critical. One of the strengths of this lens is that it is good wide open, and rarely do you need excellent corner performance with the thin depth of field at f/1.4.
In Pentax mount, there is also the SMCP 31mm f/1.8 Limited lens, which is certainly an optically superior lens at the corners, but comes in at nearly 3 times the price. I would recommend this Sigma 30mm for those on a smaller budget. I think some of the online reviews are overly harsh on this lens, as they are looking primarily at test chart data and not images produced with the lens. I recommend this lens, and wish Canon and Nikon made something similar.
Description of Sigma 30mm f/1.4 EX DC Lens for Pentax and Samsung Digital SLR Cameras
Fully compatible with all Pentax Digital SLR cameras, this large aperture 30mm F1.4 EX DC lens is designed to match the APS-C size image sensors of digital SLR cameras. Two SLD glass elements are especially effective in the compensation of magnification chromatic aberration. Glass mold aspherical lens at rear group of lens reduces color aberration and provides high-quality image results. From 40cm (15.7") minimum focusing distance to infinity, this lens creates very sharp images with high contrast. Large Maximum Aperture of F1.4 can perform superbly in a great range of applications, including snapshots, portraiture, indoor shooting and landscape photography. Please Note: Vignetting will occur if the lens is used with digital cameras with image sensors larger than APS-C size or 35mm SLR cameras.Digital Camera Accessories
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