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Status: Long, long time Contax and Yashica user; glad to be here and hope to contribute.
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on Feb 20, 2021 16:16:22 GMT
Posted: Feb 20, 2021 16:16:22 GMT
Here we can see the use of one of Yashica's enlarger lenses - the pin-sharp 50mm f2.8 - being used on a Contax RTSIII as a macro lens.  Yashica 50mm f2.8I prefer Yashica's 75mm f4.5 as it affords better separation from the subject but I can detect no difference in the qualities of the final images; both are evenly illuminated and very sharp. The 50mm has an aperture range of f2.8 to f16; I have no idea as to its optical formula. One interesting note: while Yashica's 75mm f4.5 carries a serial number and a minimum aperture of f22, the Tominon 75mm f4.5 carries no serial number and offers a minimum aperture of f32. |
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on Feb 20, 2021 22:19:31 GMT
Last Edit: Feb 20, 2021 23:06:54 GMT by xkaes
Are the Yashica and the Tominon otherwise the same? Enlarging lenses do make great macro lenses for sure. Since most are asymmetrical, most are best used reversed. I assume that the Yashica enlarging lenses have front filter threads (some don't) in which case, reversal is straight-forward. Interesting that Yashica did not indicate that this is an enlarging lens, such as "E-", "EL-", "EP-", "EX-", "C.E.", etc. like other brands.
Yashica's 40mm f3.5 enlarging lens is not marked with a "E", although the Osawa/Tominon and Hoya 40mm lenses -- which are both the same lens as the Yashica 40mm -- are both marked "EL-".
However, Yashica's 21mm enlarging lens for the Atoron is marked "E-Yashinon-DX". |
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Group: Moderator
Post: 2,040 (563 liked)
Join date: April 2014
Status: Long, long time Contax and Yashica user; glad to be here and hope to contribute.
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on Feb 21, 2021 1:17:05 GMT
Posted: Feb 21, 2021 1:17:05 GMT
They are physically very different lenses but I can't state whether they have the same optical formulae - they produce identical images. Both the Yashica and Tominon lenses have front filter threads. Are the Yashica and the Tominon otherwise the same? I assume that the Yashica enlarging lenses have front filter threads (some don't) in which case, reversal is straight-forward.
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on Mar 6, 2022 23:51:39 GMT
Posted: Mar 6, 2022 23:51:39 GMT
They are physically very different lenses but I can't state whether they have the same optical formulae - they produce identical images. Both the Yashica and Tominon lenses have front filter threads. Are the Yashica and the Tominon otherwise the same? I assume that the Yashica enlarging lenses have front filter threads (some don't) in which case, reversal is straight-forward.
Because this thread is over a year old it's quite possible, that you're already aware of everything I can contribute here, but there actually is an "Osawa Tominon EL 75 mm f/4.5" and as far as I know that's the one which should be the same as the "Yashica Lens 75 mm f/4.5" - both being 6/4 designs. The "Tominon 75 mm f/4.5" is a 4/3 Tessar macro lens (for Polaroid MP4), if my information is correct. |
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