... To clear up some of the confusion regarding how this lens will perform, there are two classes of Nikon DSLR's. The first use a sensor smaller than 35mm, about the size of the old APS film cameras, hence the term "APS class." These include the D50,70,80,90,200, etc.
The smaller sensors mean every lens has a built in zoom (or crop factor) of about 1.5. This is why wide angles for these DSLR's have been 18mm while for film it used to be 24-28mm. Lenses built for the smaller sensors also have a circle (inner lens opening) that is smaller than the older film lenses. On these type cameras this lens would perform like a 43-450mm or thereabouts.
Newer Nikons like the D3,D3X, and D700 are "full frame" and have sensors the same size as 35mm. There is no crop factor, and they can work correctly with film lenses.
This Tamron is essentially a film lens, and works best on a full frame camera. I've heard to be wary of superzooms such as this, as they tend to have distortion at the wide and tele ends and have a small maximum aperture at the tele end.
At 300MM it is f6.3 max, and that's not very good, but my D700 has such good high ISO performance I just crank it up and don't worry about. The focus is an old screw drive so it's a little slow and noisy, and it is plastic. (The focus also won't work on the D40, it needs lenses with a built in motor.) I also would prefer it have been 24mm rather than 28mm, but you can't have everything.
However, I've been very happy with the pictures it takes. They have good color rendition, the distortion isn't readily noticeable, and they're nice and sharp across the screen.
If I blew the photos up I'd probably see a lot of differences compared to a high end "pro" lens, but that misses the point. This is a "walk around" lens intended for situations where you can/want only to take one lens with you. In that role the Tamron works very well.
...
Check Amazon Price and Read More Reviews on Tamron AF 28-300mm f/3.5-6.3 XR Di LD Aspherical (IF) Macro Ultra Zoom Lens for Nikon Digital SLR Cameras
0 ความคิดเห็น
Post a Comment