Pentax SMC DA* Series 16-50mm f/2.8 ED AL IF SDM Wide Angle Zoom Lens for Pentax Digital SLR Cameras
by Pentax
Digital product summary information
Manufacturer: PentaxRelease Date: 2007-08-15
Model: B000NO5QV6
Product features:
- SMC DA 16-50mm F2.8 ED/AL (IF) Lens, Lens Cap, Rear Lens Cap B (31006), Lens Hood, Lens Soft Case
- High performance, wide angle zoom lens
- SDM system creates smoother, quieter auto focus
- Weather resistant and dust resistant body
- Quick-shift Focus System for instant switching from auto focus to manual
- Dolica CF9-ND77 77mm 0.9ND 8X Neutral Density Filter
- Dolica CF3-ND77 77mm 0.3ND 2X Neutral Density Filter
- Dolica CF-C77 77mm CPL Filter
- Dolica CF-U77 77mm UV Filter
- Tiffen 77WIDEFKit 77mm Wide Angle Filter Kit
Digital camera reviews of Pentax SMC DA* Series 16-50mm f/2.8 ED AL IF SDM Wide Angle Zoom Lens for Pentax Digital SLR Cameras
Digital camera Review: I sent the first two back
Summary: 2 Stars
They are still having problems with quality assurance. This lens arrived and it looked great. I took several test images of a large 2 foot square black-on-white ink line drawing. It had sharply defined ink pen lines all over it, all the way to the edges. The images showed that the focus was unacceptably out of alignment from left to right and also a bit out from bottom to top. Looking at the test images over all, it seems like it might be a good lens if they can get me one with the alignment right.
Ammended 9/24 2009
The replacement arrived I tested it today using the same method and the alignment on this replacement lens was out of alignment in roughly the opposite direction by a similar amount, making the left edge significantly less sharp focused than the right. I returned it for replacement. We shall see what we get on the next try. I really would like to to get a properly aligned example of this lens that can provide images with a consistent focus left and right and top and bottom.
Ammended 9/29/2009
Amazon declined to send a third lens, offering simultaneously that getting two defective examples was very unusual, and strangely that, were they to ship a third, it would likely suffer the same defect. They volunteered to refund my shipping cost and purchase price, and recommended I contact Pentax. I will post clips from the center and each of the two extreme edges of the test image on this site.
It was very easy to alert Amazon and initiate a return. I really would still like to get a good one of these lenses. Apparently you do need some amount of luck to accomplish that.
My advice to anyone wanting one of these is, be prepared to test what you get, and do not order it a week before your big vacation trip expecting to have one arrive at the last minute that is good enough to use.
More Pentax SMC DA* Series 16-50mm f/2.8 ED AL IF SDM Wide Angle Zoom Lens for Pentax Digital SLR Cameras reviews:
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1 2 3 4 5
Summary of Pentax SMC DA* Series 16-50mm f/2.8 ED AL IF SDM Wide Angle Zoom Lens for Pentax Digital SLR Cameras
The smc PENTAX-DA 16-50mm f/2.8 ED AL[IF]SDM wide angle zoom lens delivers the highest level of optical quality and includes SDM technology for fast, accurate, quiet focus. Bringing together advanced optical technologies, including aspherical elements, special optical-glass elements and original lens coatings, these new interchangeable lenses are superior to any existing lens series in terms of contrast, clarity and edge-to-edge sharpness.Designed for exclusive use with Pentax digital SLR cameras, the Pentax DA* 16-50mm f/2.8 wide-angle zoom lens is a terrific choice for landscapes, portraiture, and just about any other application. The lens features a tightly sealed, weather-resistant and dust-resistant construction to enhance durability in rainy or dusty conditions. The lens's three aspherical elements and two special optical glass elements, meanwhile, help compensate for chromatic and spherical aberration, producing images with superior contrast, clarity, and edge-to-edge sharpness. And thanks to the lens's Pentax-original Quick-Shift Focus System, you can easily and instantly switch from autofocus to manual focus.
Specifications
- Focal length: 16-50mm
- Maximum aperture: f/2.8
- Minimum aperture: f/22
- Lens construction: 15 elements in 12 groups
- Angle of view: 83 to 31.5 degrees (when used with Pentax digital SLR camera body)
- Number of diaphragm blades: 9
- Metering system: TTL open-aperture metering
- Minimum focusing distance: 0.3 meters
- Maximum magnification: 0.21x
- Filter size: 77mm
- Corresponding AF mounts: Pentax KAF2
- Dimensions: 3.3 inches in diameter and 3.9 inches long
- Weight: 19.9 ounces (without hood)
- Warranty: 1 year
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