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Forum: Pentax SLR Lens Discussion
07-14-2015, 04:33 PM
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Yeah I'm still here I just watched a video from Tony Northup and he had a good way of explaining the aperture when on a crop sensor so I'm good and I thank everyone's expanation's
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Forum: Pentax SLR Lens Discussion
07-10-2015, 08:18 PM
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Oh ok this has really cleared up a lot for me thanks guys for all the great info now I am rethinking selling my 17-50 for a 28 -75 tamron thank you so much
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Forum: Pentax SLR Lens Discussion
07-10-2015, 07:17 PM
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Forum: Pentax SLR Lens Discussion
07-10-2015, 07:07 PM
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That is what I thought thank you. But the focal length am I right on that? The only reason I ask is because the lens is built for aps-c.
---------- Post added 07-10-15 at 10:09 PM ----------
Or that means it only has to deal with the image circle that comes out the back of the lens.
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Forum: Pentax SLR Lens Discussion
07-10-2015, 06:51 PM
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So I am to understand that when I'm using my tamron 17-50mm 2.8 on my k5 it is equal to a 25-70mm lens now does this affect the aperture also or is it still considered an f2.8 ?
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