BIF Autofocus (K-70 vs KP vs K-New)

**mikesbike** · 10-21-2019, 01:27 PM

Originally posted by ndzinn

Thanks. Which camera are you using? My concern about center focus is that birds seem to move faster than I can follow with just one focus point, but I'll try again. Any thoughts about using the 55-300 PLM with the Pentax 1.4x TC? Less IQ, I guess, but still rapid autofocus?

Well, I shoot college-level roller hockey using center spot AF with good results. Of course much depends on your own capabilities. Practice does make a difference.

---------- Post added 10-21-19 at 01:37 PM ----------

Originally posted by csa

Sandy, great results under extreme lighting conditions! You're photos are starting to sway me towards a KP!

Yes, Indeed! Very impressive. If I start having frequent needs beyond 300mm, I will be considering the DFA 150-450mm myself. I've had a Sigma 150-500mm for years, which I bought used locally in perfect condition, but I've wound up not using it very often. On occasions where I have used it, results seemed quite good. I have no doubt of the DFA lens's superiority, but with infrequent use, the cost is a factor, since I do have the range already covered with decent quality.

Last edited by mikesbike; 10-21-2019 at 01:41 PM.

Vmax911 · 10-21-2019, 02:06 PM

I don't have experience with the K-70, I do have experience with the K-S2 which has the same SAFOX 10 focusing system. The SAFOX 11 on the KP is definitely an improvement. I find that tracking also works reasonably well as long as you keep the subject within the specified area. Unfortunately I don't have any experience with the current Canonikon lineup. I am certainly interested to see what the K-new has in store!

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10-21-2019, 01:27 PM	#16
mikesbike Site Supporter Join Date: Dec 2016 Location: Southeastern Michigan Posts: 4,558	Originally posted by ndzinn Thanks. Which camera are you using? My concern about center focus is that birds seem to move faster than I can follow with just one focus point, but I'll try again. Any thoughts about using the 55-300 PLM with the Pentax 1.4x TC? Less IQ, I guess, but still rapid autofocus? Well, I shoot college-level roller hockey using center spot AF with good results. Of course much depends on your own capabilities. Practice does make a difference. ---------- Post added 10-21-19 at 01:37 PM ---------- Originally posted by csa Sandy, great results under extreme lighting conditions! You're photos are starting to sway me towards a KP! Yes, Indeed! Very impressive. If I start having frequent needs beyond 300mm, I will be considering the DFA 150-450mm myself. I've had a Sigma 150-500mm for years, which I bought used locally in perfect condition, but I've wound up not using it very often. On occasions where I have used it, results seemed quite good. I have no doubt of the DFA lens's superiority, but with infrequent use, the cost is a factor, since I do have the range already covered with decent quality. Last edited by mikesbike; 10-21-2019 at 01:41 PM.

10-21-2019, 02:06 PM	#17
Vmax911 Pentaxian Join Date: Aug 2007 Location: ABQ Photos: Gallery Posts: 826	I don't have experience with the K-70, I do have experience with the K-S2 which has the same SAFOX 10 focusing system. The SAFOX 11 on the KP is definitely an improvement. I find that tracking also works reasonably well as long as you keep the subject within the specified area. Unfortunately I don't have any experience with the current Canonikon lineup. I am certainly interested to see what the K-new has in store!