Group: Administrator
Post: 1,370 (301 liked)
Join date: February 2017
Status: Failed treatment for L.B.A. and G.A.S,
|
|
on Jul 10, 2020 21:33:01 GMT
Posted: Jul 10, 2020 21:33:01 GMT
alexx ... that looks to be in really great shape, in optics and cosmetics. I should do some test shots before I forget to. I might be missing out on a gem, and wouldn't even know. (So little time, and way too many lenses)
|
|
Group: Member
Post: 69 (2 liked)
Join date: October 2018
Status:
|
|
on Oct 4, 2020 12:47:09 GMT
Posted: Oct 4, 2020 12:47:09 GMT
alexx ... that looks to be in really great shape, in optics and cosmetics. I should do some test shots before I forget to. I might be missing out on a gem, and wouldn't even know. (So little time, and way too many lenses) yes, in a very good shape. could be barely used. added 5cm f2 m42 (tessar design), ml 21, ml 135, a couple of 50/1.9 - all like if not new lenses. I think I have to start selling some stuff (bodies, rangefinders, lenses ..), i cant use them all - all the time.
|
|
Group: Member
Post: 69 (2 liked)
Join date: October 2018
Status:
|
|
on Feb 14, 2021 0:01:34 GMT
Posted: Feb 14, 2021 0:01:34 GMT
i have to correct my self for the post above, its '5cm f2.8 pre-set' (no tessar in f2)
I dont see this lens in the list. what a killer lens is it ...
|
|
Group: Administrator
Post: 1,370 (301 liked)
Join date: February 2017
Status: Failed treatment for L.B.A. and G.A.S,
|
|
on Feb 14, 2021 7:34:33 GMT
Last Edit: Feb 14, 2021 7:37:25 GMT by lumiworx
i have to correct my self for the post above, its '5cm f2.8 pre-set' (no tessar in f2) I dont see this lens in the list. what a killer lens is it ... Is it this same lens? yashica.boards.net/post/4356/thread If it is, greyscale doesn't mention what mount it is in that post. I see that there is a "50mm 2.8" Yashinon in the draft lens list as an M42 version. Might this be the same lens - that's noted as 50mm and not 5cm - or are there two separate lenses, with one possibly being the pictured preset, and the other one is an 'auto' version? I personally don't have any 2.8 versions to check it/them myself. I can certainly add it into the draft lens spreadsheet once we figure out any corrections, and biggles3 or I can edit his original forum post that has the current list in that topic to add to it or correct the list.
|
|
Group: Member
Post: 69 (2 liked)
Join date: October 2018
Status:
|
|
on Feb 14, 2021 20:05:37 GMT
Posted: Feb 14, 2021 20:05:37 GMT
yes thats the model, and indeed in M42.
from what I found, the very first M42 series were just re-worked Penta mount to M42: 35/2.8, 50/2, 50/2.8, 100/2.8 and maybe 135 but not sure.
so, a bunch of M42 yashinon-r's (yeah that fancy "-r"!) could come from Tomioka as Yashica bought them in the end of '60, use them in Penta mount and later from the parts bin just re-worked on a lathe to fit M42. Typical Jap post ww2 war mass production approach.
I would not be surprised that the glass was made first for Nicca. Anyway German optical formulas, nothing new here, carry on ..
Note: all the info I found is from the net
|
|
Group: Member
Post: 69 (2 liked)
Join date: October 2018
Status:
|
|
on Feb 14, 2021 20:07:08 GMT
Posted: Feb 14, 2021 20:07:08 GMT
forgot
"Is it this same lens? yashica.boards.net/post/4356/thread "
you can see clearly: 5cm (and not 50mm)
|
|
Group: Administrator
Post: 1,370 (301 liked)
Join date: February 2017
Status: Failed treatment for L.B.A. and G.A.S,
|
|
on Jun 10, 2021 22:29:40 GMT
Last Edit: Jun 10, 2021 22:32:04 GMT by lumiworx
A question I had lead me to click on one of the Zeiss datasheet links in the Zeiss C/Y spreadsheet... and it lead to a blank page. Apparently Zeiss has made substantial changes to the historical resources they provide to visitors in the download center on zeiss.com. I've sent an inquiry via their site site to ask about hosting some copies of all the C/Y legacy lenses to keep them available for community access - IF - they could provide them.
It might take some time to get an answer, but I thought I might also ask if there are members who might have downloaded copies for their own use, and might be willing to share them. I'd like to host them all and rework the links in the spreadsheet to point to the new location. I think I have a few I've saved over the years, but I'm certain I don't have all of them.
In the event that Zeiss doesn't answer in the affirmative to my request, or not all of the datasheets are otherwise available to host them - I'll just remove the active links in the spreadsheet.
|
|
Group: Administrator
Post: 1,370 (301 liked)
Join date: February 2017
Status: Failed treatment for L.B.A. and G.A.S,
|
|
on Jun 11, 2021 19:49:26 GMT
Last Edit: Jun 11, 2021 19:49:53 GMT by lumiworx
To continue with the Zeiss C/Y datasheet changes in the spreadsheet, I've created a new thread to keep this one on-topic. It's posted here: yashica.boards.net/post/7666/thread
|
|
Group: Member
Post: 60 (7 liked)
Join date: November 2020
Status: My first SLR was an FX-2 in 1979. I’ve been shooting and collecting Yashica/Contax gear ever since.
|
|
on Jul 4, 2021 0:57:29 GMT
Posted: Jul 4, 2021 0:57:29 GMT
but I thought I might also ask if there are members who might have downloaded copies for their own use, and might be willing to share them. I'd like to host them all and rework the links in the spreadsheet to point to the new location. I think I have a few I've saved over the years, but I'm certain I don't have all of them. In the event that Zeiss doesn't answer in the affirmative to my request, or not all of the datasheets are otherwise available to host them - I'll just remove the active links in the spreadsheet. I downloaded all the data sheets last year because things have a habit of disappearing. Which ones do you need? Dale
|
|
Group: Administrator
Post: 770 (71 liked)
Join date: August 2016
Status:
|
|
on Sept 18, 2021 0:49:35 GMT
Last Edit: Sept 18, 2021 19:57:13 GMT by xkaes
I notice that some of the lenses on the LENS LIST are marked in CM and most in MM. I get that, but what if a lens was made/marked with both?
I also notice that some of the lenses on the LENS LIST are marked with a -R and most not. I get that, but what if a lens was made/marked with both?
I ask only because I just ran across this and the list only has it listed in MM, not CM. Does this mean it came with both designations -- or just CM?
Also, I've only seen this as SUPER YASHINON-R (meaning preset, I guess) and was never made in an AUTO YASHINON version. This one has a serial # that starts with R. Does this mean it came with both designations -- R in the serial # and after YASHINON?
I'm guessing this also applies to the 800mm version.
FYI, the owner claims it has a T-mount, but it's easy to confuse that with a M42 mount.
I know this is simply esoterica for most, but I know we like to have the LENS LIST as accurate as possible.
Here is a Super Yashinon-R 30cm. The R is not in the serial number, but it is marked in CM not MM:
|
|
Group: Administrator
Post: 1,370 (301 liked)
Join date: February 2017
Status: Failed treatment for L.B.A. and G.A.S,
|
|
on Sept 19, 2021 5:45:47 GMT
Posted: Sept 19, 2021 5:45:47 GMT
I notice that some of the lenses on the LENS LIST are marked in CM and most in MM. I get that, but what if a lens was made/marked with both?
I also notice that some of the lenses on the LENS LIST are marked with a -R and most not. I get that, but what if a lens was made/marked with both?
I ask only because I just ran across this and the list only has it listed in MM, not CM. Does this mean it came with both designations -- or just CM? I think it's safe to assume that any Yashica lens is designated uniquely in name/model/'family', and that even though some might seem to be the same lens at first glance, that's probably not the case. There certainly are some cosmetic differences - i.e., beveled 'chrome nose' edges vs square edged all-black barrel sections, and diamond vs pyramid grip rubber - that were incrementally updated over time within any given model... but I don't think the 'meat' of the lens ever shows up in more than one model designation. I haven't taken apart one of every lens to guarantee that's a 100% accurate statement, but optical formulas and/or coating formulations and numbers of layers don't seem to cross over into other models. And a CM lens may have an equivalent MM focal length sibling, but I doubt they are the same at the optical level. As far as I now, there were no "-R" Yashinon or Super Yashinon lenses made after the last of the M42 lenses were produced, and again, I have my doubts that later lenses of those same focal lengths shared the same internals or formulations. One note on preset lenses... the nature of the design and the control rods/levers used to set the apertures, meant that the internal 'throat' size had to be slightly smaller, and I presume that affected the optical design and layout. I wouldn't necessarily assume that to be entirely true when mount types were changing, though there may have been some upgrading when it happened to coatings or glass formulas. I'd think at those periods in lens production (from Y/P bayonet, to M42), designs were still based on mathematics via slide rules and pencil on paper, than crunched with computer models, and they had a lot of time and money invested in optical designs that were already proven to work. In those cases I can see some duplication of the optics in general, but obviously in an updated 'frame' and possibly with upgraded coatings, but not necessarily in the number of layers... just the application technique or their chemical makeup.
|
|
Group: Administrator
Post: 770 (71 liked)
Join date: August 2016
Status:
|
|
on Sept 19, 2021 13:39:28 GMT
Posted: Sept 19, 2021 13:39:28 GMT
I've got to assume that the lenses marked CM were produced before the "same" lens marked MM, and it's possible (probable?) that they were the same, but because they possibly could be different in important ways, doesn't it suggest different listings in the LENS LIST?
The same could be said for the lenses marked with "-R" as opposed to those with the "R" in the serial number. Are they different?
The lenses that were pre-set -- and later AUTO -- are listed separately because of the obvious change, but for lots of lenses all we have to go on is the inscription on the lens. There may or may not have been changes made, but if only one is listed in the LENS LIST, it might lead to some confusion.
I know it did for me when I ran across the 60CM Super Yashinon with the R in the serial number. They may or may not have made changes to the lens -- like offering it with different mounts??? -- but I've got to assume that this change probably happened to other Yashica lenses of the same period.
|
|
Group: Administrator
Post: 1,370 (301 liked)
Join date: February 2017
Status: Failed treatment for L.B.A. and G.A.S,
|
|
on Sept 19, 2021 18:37:52 GMT
Posted: Sept 19, 2021 18:37:52 GMT
xkaes ... I think these are questions that fall into the 'splitting hairs' end of the spectrum. I'm not suggesting that's good or bad, only that generally one draws a line that fits some common ground, or a choice is made where there's simply no longer any line at all, where the minutia of detail is the final goal. Personally, my perspective has been that I'll follow the 'official' releases of whatever piece of a particular item there might be, whether that's a body, lens, accessory, etcetera... and not delineate every part of any specification changes. I've taken the maker's position that if it wasn't significant enough in their eyes to change the results produced, the retail cost of the item, or public dissemination and/or updated documentation for feature changes... then whatever change was made likely made little difference from a user perspective for any affected items. Yes, collectors are more likely to want to identify the infinitesimal details, where users may not care one bit if they were modified in multiple ways. As stated before, my personal perspective is present in how I present data on my own sites -but- I'm not here as an admin to dictate what should or shouldn't be included, nor for what audience this site should cater to, or helps to inform. I think we all do a good job of discussing details valuable to every perspective represented in individual topics, but I think in this case, it might be better left to biggles3 on what does or doesn't get included in the list, as he is the original compiler and author. Compiling another list to suit a different purpose might also be valuable, when its intent is to detail those miniscule changes or minor upgrades within a given model where no name changes were made, or new specifications were published to announce them. Both lists could be used together to provide details to benefit both users and collectors, when they can be compared.
|
|
Group: Administrator
Post: 770 (71 liked)
Join date: August 2016
Status:
|
|
on Sept 19, 2021 19:03:38 GMT
Posted: Sept 19, 2021 19:03:38 GMT
I appreciate your perspective. As a user, more than a collector, I have little interest in how a lens is inscribed becasue, as you mention, the inscription can change even when the lens basics (optical formula, f-stops, etc.) don't. And to make things even messier, there are plenty of instances where there are important changes to a lens, but the inscription remains exactly the same!
But I was thrown off when I saw a Super Yashinon 60CM that wasn't marked "-R" -- even though it is a pre-set. My first thought, of course was that it was different somehow than the Super Yshinon-R 600MM -- especially when the owner claims it has a T-mount and not an M42 mount.
Anyway, if anyone happens to know where I could find some good pictures of the 600mm or 800mm Yashinon lenses, I would appreciate it. All of the ones I can find are way too small, too dark, low-res, etc. to be helpful.
|
|
Group: Administrator
Post: 1,370 (301 liked)
Join date: February 2017
Status: Failed treatment for L.B.A. and G.A.S,
|
|
on Sept 19, 2021 20:35:33 GMT
Last Edit: Sept 19, 2021 20:36:35 GMT by lumiworx
... Anyway, if anyone happens to know where I could find some good pictures of the 600mm or 800mm Yashinon lenses, I would appreciate it. All of the ones I can find are way too small, too dark, low-res, etc. to be helpful. The only place there's a clear picture (not necessarily a photo) of the whole 800mm - although small - is here: allphotolenses.com/lenses/item/c_3561.htmlThe 600mm is slightly easier to find as a true photo, but still not very large in pixel size... it's here: www.thecuckoofarm.com/cuckoo/photo/lens/tm/yash600sr/yash600sr.phpYou might be able to contact the site's owner about the 600mm, and see if s/he could help with questions or more photos. There's a 'Contact' link at the bottom of the page. Other than those 2 sources, the best I can offer is an original brochure copy that Ariel posted in the Brochures topic section with both the 600mm & 800mm shown, and one posted by biggles3 from the TL Electro line, that has both the 600 & 800 on the same page, and several of the 'Super' lenses as well. [ One hint on doing searches for photos... get familiar with the "Tools" menu available in Google's image search. You can select general sizes (Icon, MED, LRG) and by color and type where that might help. The main benefit is that it only shows images, and no textual content results beyond the site's name in thumbnail view, and it offers previews on the results with a slightly larger view when opened in the sidebar. ]
|
|