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05-24-2016, 01:20 AM   #16
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QuoteOriginally posted by Adam Quote
I'd say, subjectively, that the motor in the 28-105 is faster, but this is balanced out by the fact that 0.5 to 1.5 stops less light reaches the AF sensor. The latter may therefore perform a bit worse in low light (then again you'll probably be using a different lens in that situation).
Thank you!

I tried the 24-70 at a camera shop and it seemed to me that it's much faster in AF speed on the K-1 than the DA 18-135 on the K-5.

05-24-2016, 02:04 AM   #17
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QuoteOriginally posted by acoufap Quote
I tried the 24-70 at a camera shop and it seemed to me that it's much faster in AF speed on the K-1 than the DA 18-135 on the K-5.
That's quite likely, especially if it wasn't too bright in there. The low-light performance of Pentax AF systems has been greatly improved over time, most notably through the K-5 II.

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