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Pentax K 15mm f1:3.5 AS at KEH US $819.00
Posted By: aoeu, 09-24-2014, 11:54 AM

Asahi Pentax 15mm f/3.5 SMC Lens With Built-In Hood

Asahi Pentax 15mm F 3 5 SMC Lens with Built in Hood | eBay

K 15/3.5 AL Bojidar Dimitrov's Pentax K-Mount Page

In late 2005 I received a very interesting e-mail from Conrad Eckhardt, who had made the following observation: the image that I was displaying on this page at that time showed a lens whose distance-scale in feet is ... 7 4 2 1.5 ... and the "standard" SMC and SMC-A lenses have a distance-scale sequence of ... 7 3 2 1.5 ... Indeed!!! Although this is no proof, it fits very well with the research by Dario, so I consider it likely that when Pentax redesigned the optical construction of the lens, they also "recalculated" the distance-scale. In other words, it is my opinion that lenses with the name SMC PENTAX 1:3.5/15 and a distance-scale that includes a 4-foot-mark have one aspherical element.

Last edited by aoeu; 09-24-2014 at 12:35 PM. Reason: Added text.
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09-25-2014, 12:23 PM   #2
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With a nonstandard case according to Dmitrov

Pentax SMC A 15mm F3 5 MF Lens with Case Caps | eBay

It costs more. If I was investing in history I would have already bought the lens in the root post.

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