Sigma 100-300mm f/4 on Nikon crop sensor camera?

8 years 10 months ago #441597 by Damon
Anyone using this lens on a Nikon crop sensor camera?  I have the D90 and would like to know how is the auto focus of this lens and also how does it perform on a crop sensor camera?  I've read some reviews of other Sigma lenses and some people talk about the auto focus can lag a bit in Sigma glass. 


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8 years 10 months ago #441608 by garyrhook
Crop sensor doesn't matter. It doesn't matter.

Did I say it doesn't matter?

Yes, the view area is smaller, but it is what it is. The focal length of the lens is all you should care about because the sensor size is what it is. And the sensor size does not change the focal length. Physical impossibility and all that.

As for whether it performs well with respect to AF, that's a good question. One wonders whether the comment about Sigma glass has to do with the built-in motors? With a D90 you don't have that restriction.


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8 years 10 months ago #441718 by Shadowfixer1
This lens uses HSM for focusing so it should be pretty quick. Some designs just focus faster than others. I don't know about this particular lens but generally fast or slow focusing is not brand specific. Every manufacturer has some dogs when it comes to speed.
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8 years 10 months ago #441782 by effron
As to the crop sensor issue. It might even be better overall on a crop camera. A lens will usually be weakest in corners, on edges. The D90s sensor will crop those edges out, of course. I sometimes shoot my 24-70 f/2.8 on my D7100 and with proper technique its amazing!.....Gary is correct, to be brief....;)

Why so serious?
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