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Anyone recognize this Vivitar 55mm f2.8 ?
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PostPosted: Wed Oct 12, 2011 1:31 am    Post subject: Anyone recognize this Vivitar 55mm f2.8 ? Reply with quote

https://picasaweb.google.com/110443462489359406148/GearAug2010?authkey=Gv1sRgCKKy5JST4aW5vAE#5662378323602368338

Would appreciate any info you might have on it. My Google-Fu is failing.


PostPosted: Wed Oct 12, 2011 1:50 am    Post subject: Reply with quote

OK. I think this is a 55mm F2.8 Rikenon. The auto aperture scale one direction and the manual the other direction seems to be the dead giveaway.

Mentioned in the Ricoh Singlex TLS manual.

I was hoping it might be a macro, but it appears it isn't. Crying or Very sad Confused Laughing


PostPosted: Wed Oct 12, 2011 2:32 am    Post subject: Reply with quote

I hear its a Cosina made camera and lens. Very Happy.

The 9 prefix on the lens and this page


PostPosted: Wed Oct 12, 2011 3:33 am    Post subject: Reply with quote

Thanks, Kathmandu.
It appears to have been sold under a number of labels:
Porst Color Reflex Auto 55mm f2.8
Super Carenar 55mm f2.8, the Vivitar and the Rikenon (as well as the Cosinon).


PostPosted: Sat Oct 30, 2021 7:23 pm    Post subject: Tessar Formula? Reply with quote

OK, I am raising the dead rather than start a new thread on this lens.

These 55mm f/2.8 lenses were in fact made by Cosina. Mine is a Vivitar and the serial number is 95500651, the leading 9 indicates that Cosina made it. Mine is a 1975ish version and it originally came with a 70's series Vivitar SLR (220/SL, 250/SL)). The optical construction of the lens is pictured in the 1975 owner's manual for the Vivitar 220/SL:




As I am not very knowledgeable on optical design, I will ask here. Is this a Tessar design?


Thanks!


PostPosted: Sat Oct 30, 2021 8:05 pm    Post subject: Re: Tessar Formula? Reply with quote

aoresteen wrote:
OK, I am raising the dead rather than start a new thread on this lens.

These 55mm f/2.8 lenses were in fact made by Cosina. Mine is a Vivitar and the serial number is 95500651, the leading 9 indicates that Cosina made it. Mine is a 1975ish version and it originally came with a 70's series Vivitar SLR (220/SL, 250/SL)). The optical construction of the lens is pictured in the 1975 owner's manual for the Vivitar 220/SL:




As I am not very knowledgeable on optical design, I will ask here. Is this a Tessar design?


Thanks!


Just like Kathmandu mentioned ten years ago.
Kathmandu wrote:
I hear its a Cosina made camera and lens. Very Happy.

The 9 prefix on the lens and this page


It is a 4/3 design so it could be a Tessar https://lens-db.com/ricoh-auto-rikenon-55mm-f28/

Here's a wide open shot
Ricatnon by The lens profile, on Flickr


PostPosted: Sat Oct 30, 2021 9:07 pm    Post subject: Re: Tessar Formula? Reply with quote

aoresteen wrote:
...


PostPosted: Sun Oct 31, 2021 10:41 am    Post subject: Reply with quote

The image I posted won't show due to an issue with my SSL certificate. My ISP is working on it. Sorry!


PostPosted: Mon Nov 01, 2021 3:10 pm    Post subject: Reply with quote

Images should now work per my ISP. If not please let me know. Thanks!


PostPosted: Mon Nov 01, 2021 5:37 pm    Post subject: Reply with quote

That is a Tessar indeed