Yes, I have already checked then database here at Pentax Forums

The following is a partial list is from a site that claims certain patents correspond to Pentax brand lenses.

Before accepting a patent as corresponding to a lens I match the patent optical prescription against the manufacturer lens construction diagram.

Clearly, to do that I need a diagram!

If you're curious to see some of the matches already available you can visit the PhotonsToPhotos

Optical Bench Hub
(which in turn opens the

Optical Bench with the selected lens.)

Here's my wish list:

SMC Pentax-Q O3 Fisheye 3.24mm f4.8

SMC Pentax-Q O4 Standard zoom 5-15mm f2.8-4.5 (8:7)

SMC Pentax-Q O1 Standard prime 8.5mm f1.9

SMC Pentax-DA 12-45mm f3.5-f4.5 APS-C

SMC Pentax 20mm f1.4

SMC Pentax 24mm or 28mm (8:7 or 9:8)

SMC Pentax 24mm or 28mm f1.4 (9:7)

SMC Pentax-F 35-105mm f4-5.6

SMC Pentax-M 35-135mm (12:9)

SMC Pentax-DA 35mm f4 (8:6)

SMC Pentax-A645 45mm f2.8

SMC Pentax-F 60mm f2.8 or f4 SOFT (4:2)

SMC Pentax-FA 100mm f2.8 (6:6 or 7:7)

SMC Pentax-A 100mm f2.8 macro (9:8, 8:7 or 7:6)

SMC Pentax-A 200 f4 (6:6)

Thanks!

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Last edited by bclaff; 06-28-2020 at 08:35 PM.
Reason: Updating the list
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