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09-13-2021, 09:15 AM   #1
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No lens diagram information for the Pentax-F zooms

II can't seem to find any lens diagrams for the Pentax-F zooms (except the 35-80 which is leaning towards the FA Design more anyway). Does anybody know a resource for them?

09-13-2021, 09:46 AM   #2
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If you look up each individual lens you can find diagram sometimes in the lens review section
09-13-2021, 09:50 AM   #3
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QuoteOriginally posted by Ronald Oakes Quote
If you look up each individual lens you can find diagram sometimes in the lens review section
For most of the primes, but only 2 of the zooms.
09-13-2021, 10:21 AM   #4
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Some are included here:

The K-Mount Page | Information about Pentax technology

Bojidar Dimitrov's Homepage

What a great resource

09-13-2021, 10:34 AM   #5
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Ok I have been able to find diagrams of the 35-70, 70-210 and 100-300(FA like) on Allphotolenses the 35-80 is over here as well as the 17-28mm Fisheye zoom and SMC Pentax-F 80-200mm F4.7-5.6 (another FA like one) and the 250-600 monster zoom.



Still missing 24-50,28-80,35-105,35-135 (same story for their a-series equivalents and most Pentax-a zooms as well)
09-13-2021, 10:50 AM   #6
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QuoteOriginally posted by D1N0 Quote
II can't seem to find any lens diagrams for the Pentax-F zooms (except the 35-80 which is leaning towards the FA Design more anyway). Does anybody know a resource for them?
What do you need the lens diagrams for?
Even in one of the latest F lens brochure (1988) there is only one diagram.
09-13-2021, 12:00 PM - 2 Likes   #7
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QuoteOriginally posted by angerdan Quote
What do you need the lens diagrams for?
Even in one of the latest F lens brochure (1988) there is only one diagram.
It is not a question of need, but one of curiosity.

09-14-2021, 12:36 PM   #8
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Why not look here : Pentax K-Mount Lenses and Lens Accessories | The K-Mount Page
09-14-2021, 05:41 PM   #9
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Is the F24-50 optically the same as the A24-50?
I seem to remember hearing that somewhere...

-Eric
4 Days Ago   #10
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QuoteOriginally posted by glasbak Quote
It wasn't entirely obvious to me the diagrams are hidden under links, but thanks
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