Aperture of focus sensor

Discussion of all digital SLR cameras under the Minolta and Konica Minolta brands
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Brad Smith
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Joined: Fri Mar 20, 2009 12:38 am

Re: Aperture of focus sensor

Unread post by Brad Smith »

Interesting read.

Would it make sense that my slow (f/3.5 I think), cheapie Tamron 55-200 seems to require a larger 'item' to focus on (using the centre focus point) than my faster (f/1.4)Sigma? The Sigma seems to be able to focus on very small items in the centre of the frame but the Tamron will quite often choose to focus on an item outside of the spot I was actually trying to focus on unless the item in question is quite large.

Thanks.
Brad
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