I was shooting a parade with a D80 and Sigma 150 f2.8. I missed several shots, because the lens was too slow to lock focus. If I use this lens with the D7K that I have on order, will performance improve, or is focus speed totally dependent on the lens?
Would I have much success with this lens for BIF? My only other choice is the nikkor 18-200.
I may be incorrect with this but I believe I read in the manual that third party lens may not perform as expected. Of course, this could be a ploy from Nikon to have people buy only Nikon. Hogan and Rockwell have tested different third party lens on other Nikon bodies with no problems. LensRentals.com does reviews on some of these lens. Good luck.
Nobody should seek his own good, but the good of others. <><
I just bought the 18-200mm Nikkor lens and I tested the 18-200 Sigma lens before I spent the extra money on the Nikkor lens and it (the sigma) was significantly slower to focus, particularly with moving subjects.
If the lens does not have an HSM system, it will be focused by the motor in the camera body. The D7000 probably has a marginally more powerful motor than the D80 for a marginally faster focus. To get noticeably faster focus, you would need to move up to a bigger camera body (D300 or D700 lines). Someone will probably have a more definitive answer....
---------+---------+---------+---------+ Joseph K Seattle, WA, USA
>OK, understood, but that wasn't the question. Is there >something about the D7000 that will allow my existing sigma >150 to focus faster than it does on the D80?
I have the Sigma 150/2.8, and I've had the D80/D200 and now have moved on to the D7000.
The Sigma 150 is a great lens, is HSM, but still not known for tremendous speed. However, at the long end, I've shot soccer games and tennis matches with it, and a D200, at field/court level. Very adequate.
In my opinion, but this is without real testing, my 150 seems to be quicker on my D7000. The D7000 AF system is Nikon's most advanced, 2 generations after the D80/D200. In theory, I would think many lenses should AF better with the D7000... my 150 seems both accurate and subjectively faster. I have not had a chance to shoot real action with it though.
"Either way, it is certainly true that Nikon has made significant improvements to the D7000's contrast-detection AF system compared to its predecessors, and we're confident that the D7000 offers the fastest CD-AF of any current Nikon DSLR. It is also worth noting that its CD-AF is noticeably faster than the Canon EOS 60D."