Originally posted by dickymastelero Just started testing a variaty of Pentax DA Primes on my K-01. Tested a DA*50-135mm 2.8, 35mm F2.4. 14mm F2.8 and also FA 50mm 1.4. Lenses exhibit excellent results both in raw and jpeg modes. Autofocus seems to be slow in most tele-lens (also tested it with a Tamron 70-200mm F2.8) but still resoanable - common for cameras when you focus on live view. I did some adjustments on the menu and it seems to speed up its focus ability, I went to customize the AF/ AE-L Button and change its setting to ENABLE AF2 and set AE-L with AF locked to "on" (C Custom Setting 1). This changes made a difference on my lenses, its seems that the contrast shows right away as the camera sets its exposure values and makes AF locks easier - the AF focus relies primarily with contrast in this K-01. Hopefully you guys can give this suggestion a shot and hope you can also post your replies and results. Thanks.
Results for Lenses Tested on my K-01
35mm F2.4 - Good, reasonably fast cycle, Decent lighting condition
14mm F2.8 - Good, reasonably fast cycle,
FA 50mm 1.4 - Good, reasonably fast cycle, Decent lighting condition
DA*50-135mm 2.8 - Slow (but reasonable for CDAF), well lit condition
Tamron 70-200mm F2.8 - Slow (but reasonable for CDAF), well lit condition
Observations are done according the parameters I posted on my thread - I went to customize the AF/ AE-L Button and change its setting to ENABLE AF2 and set AE-L with AF locked to "on" (
C Custom Setting 1).
For the DA* 55-135mm 2.8 you can get fast AF results if you made made adjustments to your Quickshift AF ring first before locking the AF. For the Tamron 70-200mm you can also make manual adjustment with the lens first but it takes a lot of hassle to move the dials to manual focus first.
I've used most of my lens either Genuine or aftermarket prime lens on my K-5 and I always check their accuracy using Lenscal Calibration Tool, for anybody who have done this we know that this is a big disadvantage for K-01 not to be able to calibrate lenses manually. Almost all my DA prime lenses calibrates bang-on with my K-5 except for Sigma's and Tamron's.
K-01 is built under the platform of K-5 and assume that it's firmware primarily recognizes data from genuine pentax lenses rather than the aftermarkets. The K-01 is not meant to be as advanced as like the K-5, its more as lined up with the K-x but mirrorless and I really don't expect much on it but for the purpose on just to be able to use my prime pentax lens on one of the best mirrorless reviewed recently makes me a proud owner of this camera.
My advise is use your best pentax lens with it and enjoy the quality of image it produces. Cheers.