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05-28-2021, 09:13 PM   #1
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Auto-Takumar 55mm f1.8 (version 2, late)

this jewel arrived this week and I noticed that it was missing from the Photo Archive

mine is the late-edition of the second version, according to this review:

SMC/S-M-C/Super-/Auto-/Takumar 55mm F1.8 Reviews - M42 Screwmount Normal Primes - Pentax Lens Reviews & Lens Database

it looks like a Super Takumar, but isn't; my Super Takumar 55/18 is on the right:



reversed aperture ring:



and six blades:



05-28-2021, 09:14 PM   #2
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05-28-2021, 09:15 PM   #3
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05-28-2021, 09:15 PM - 1 Like   #4
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05-28-2021, 09:16 PM   #5
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05-29-2021, 03:28 AM   #6
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Ooooooh that is lovely. What a nice render
05-29-2021, 05:24 AM   #7
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QuoteOriginally posted by Cerebum Quote
Ooooooh that is lovely. What a nice render

thank you - I wonder if the 10-bladed aperture would have been any smoother (not likely, I think)

05-29-2021, 07:41 AM - 1 Like   #8
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Do these two 55's have differences in optical design?
05-29-2021, 02:28 PM - 1 Like   #9
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Cookies for scale, I've never seen that before, but I like it
05-29-2021, 04:07 PM   #10
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QuoteOriginally posted by pres589 Quote
Do these two 55's have differences in optical design?
yes, they do...

according to the review page:

QuoteQuote:
This fast 55mm screwmount lens existed in several versions all with the same optical diagram. From the 1965 version, at least one of the glass elements is made from radioactive glass which yellows over time. While the optical diagram remained unchanged, tweaks to the optics (surface curvature, distance between elements) can't be precluded when Pentax switched glass type.
SMC/S-M-C/Super-/Auto-/Takumar 55mm F1.8 Reviews - M42 Screwmount Normal Primes - Pentax Lens Reviews & Lens Database
05-30-2021, 06:17 AM   #11
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07-06-2021, 07:30 AM   #12
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