I feel misled: Panasonic 20mm f1.7 II AF is SO SLOW!

Started Apr 28, 2014 | Discussions thread
Mark Chan Senior Member • Posts: 1,714
Re: I feel misled: Panasonic 20mm f1.7 II AF is SO SLOW!


answer simply.  Have you had experience comparing the two lens - 17mm f1.8 and 20mm F1.7?

Which one is faster to focus?

Which one does focuses similarly fast under ALL conditions? Not conditions YOU stipulate in YOUR controlled test?

Can't answer that? Or will you still extrapolate from your findings?

The OP here had the 17mm f1.8; his statement comes from HIS direct experience using both lens, and stating he feels misled that the 20mm f1.7 would be fast enough.

YOUR picture shows a general condition that any point and shoot can take.  Your controlled tests help you identify 'conditions' in which this lovely lens of yours will focus 'comparably' with other lens.

Maybe Panasonic should hire you to promote their lens.  Do remember to tell them to place a sticker on the box stating 'AF works as fast as similar lens under 'set' conditions.  Or to 'not expect' fast AF when focusing from close range to infinity or vice versa.

Seriously and you still think you are not misinforming others as regards the strengths and weaknesses of this lens.

You state you are a scientist.  If you so want to continue claiming what you claim, do go and buy or loan a 17mm f1.8 or even the 25mm f1.8 and redo all your tests.  EVEN then state clearly under what specific conditions the 20mm f1.7 works equal to them, and what conditions do not.  Be holistic please.

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