While overall dimensions are confined to the absolute minimum, the SP AF70-200mm f/2.8 zoom lens is packed with features that allow stress-free photography: a versatile MFD of just 37.4" over the entire zoom range; best-in-class maximum macro magnification ratio of 1:3.1 at f=200mm; and an advantageous internal focusing (IF) system. The new tele-zoom lens covers a desirable focal length range of 70mm medium telephoto to 200mm telephoto when mounted on full-size format SLR cameras and a focal length range from 109mm to 310mm* ultra telephoto when mounted on a DSLR camera with an APS-C sized imager.This lens boasts a minimum focus distance of 0.95m over the entire zoom range, the best performance in its class. This makes large-aperture telephoto zoom photography possible over a longer shooting range. The lens also has a maximum magnification ratio of 1:3.1 (at 200mm, with a minimum focus distance of 0.95m), enabling you to enjoy close-up macro photography of flowers, insects, and other tiny objects.This zoom lens uses three LD (low dispersion) elements which effectively compensates for chromatic aberrations providing edge-to-edge sharpness and high-contrast image quality with flat-field characteristics over the entire zoom range. Moreover, through the use of “Internal Surface Coatings (i.e., multiple-layer coatings on cemented surfaces of plural elements)” and multiple-layer coatings to prevent reflections from lens surfaces is reduced to the absolute minimum.Features:Lightweight large-aperture telephoto zoomMinimum focus distance of 0.95m throughout the range plus 1:3.1 for excellent macro shootingBright viewing at all focal lengthsAbility to shot in lower-lit situations at full zoomHigh-performance designIncludes:AF 70-200mm f/2.8 Di LD (IF) Macro Telephoto Zoom LensPentax MountFlower-shaped HoodLens CaseTamron lenses come with a Six-Year Limited WarrantyThis Tamron lens is warranted against defective materials or workmanship for Six Years from the date of original purchase, and is limited to repair, adjustment and/or replacement of defective parts. This Warranty covers all defects encountered in normal use of the lens. This Limited Warranty does not cover normal wear and tear such as scratches, etc. (read more »)
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1 out of 1(100%)reviewers would recommend this product.
Customer Reviews for Tamron AF 70-200mm f/2.8 Di LD (IF) Macro Telephoto Zoom Lens for Pentax
Review 1 for Tamron AF 70-200mm f/2.8 Di LD (IF) Macro Telephoto Zoom Lens for Pentax
PostedNovember 25, 2010
from Logan, UT
Green River Lakes, Wyoming
Grand Prismatic Pool, Yellowstone NP
Short answer: Almost perfect if you aren't depending on fast accurate auto-focus. It is considerably less expensive, too -- buy this AND another lens for the price of just one of its more expensive cousins.
I attach it to a Nikon D700 full-frame and it is my second most frequently used lens (right after a Nikkor 24-70mm f2.8). I've never yet used it on a tripod since most of the things -- well, basically everything I photograph is action or fleeting; no time for tripods. It does not have vibration reduction but it is so massive it eats vibration anyway and I've shot hand-held right down to 1/20th second with excellent results (take several shots if you are going to do it that way).
I purchased this lens specifically for sports and rodeo. It is perfect for rodeo; it has not quite long enough reach for most sports but a teleconverter might suffice. The f2.8 is excellent for night and indoor action.
It makes beautiful portraits with amazingly smooth "bokeh" or the appearance of out-of-focus backgrounds.
Excellent uniformity of illumination among the best in its class -- I almost never have to tweak the corner brightness except at wide angle in dim light situations where the lens is wide open.
It is very sharp corner to corner. Some reviewers say it is less sharp in the middle of its zoom range but I have not noticed any situation where it is less sharp. I quite often use mine wide open -- what's the point of having f2.8 if you cannot use it?
It is quite heavy and solidly built.
Commentary on focus: It "hunts" under circumstances that I do not entirely understand. Not only that, it hunts after it should have locked up in single focus mode. Would I pay three times the price for a lens that doesn't hunt? For me that isn't even an option, but it might be for you.
It is one of the easiest manual focusing lenses I have used so most of the time I snap it to manual focus -- a trivial task even with your eye on the finder as the entire focus ring snaps back about 3/16th inch toward the camera to engage the manual focus clutch and disengage automatic.
It is a very fast focusing lens, good for action, not so good for fine tuning. Since the closest focus is around one meter, you can go from infinity to one meter with only an 80 degree twist of the ring.
Minor nit -- the Tamron base cap won't fit my Nikkor lenses. That made no sense until I realized it was hitting the rubber gasket on a Nikkor that is not on the Tamron. Since Nikkor caps fit the Tamron, just use Nikkor caps on all lenses.
Pros: Great Bokeh, Vignetting, Beautiful Colors/Contrast, Good Low-Light Performance, sharp