YASHICA 10cm(100mm) F2.8 TOMINON SUPER YASHINON-R

bkwphoto · Joined: 29 Jul 2013 Posts: 8 Location: usa

Just bought this lens in a thrift store with leather case and front cap. Us $20 After google search it appears rare anybody know more about it. Think it is a pentax rangefinder mount but not sure. Any info would be appreciated.

Brian

luisalegria · Expire: 2018-01-18

There is no Pentax rangefinder that I know of.

Yashinons like this would likely have been made in -

Screwmount Leica (M39); either for Yashicas own rather rare (ex-Nicca) M39 rangefinder; this would be in the later 1950's
Yashica-specific SLR bayonet (Pentamatic) for the earliest Yashica SLR's - @1959-62
M42 screw mount - 1961-62 to 1978 or so.

No doubt other mounts are possible, but would be true rarities.

Tomioka made many lenses sold as Yashinons. There was a 100/2.8 lens made for the Pentamatic (the early bayonet), so this may be yours. Not easy to adapt so I doubt there is much experience with it.

This is Butkus' manual for the Pentamatic - scroll down and you will see the accessory lenses supplied for that mount. As far as I know these may have been the only lenses made natively for that camera. Check out the 100/2.8, it may be yours.

http://www.cameramanuals.org/yashica_pdf/yashica_pentamatic.pdf

Attila · Expire: 2025-11-18

Never seen never heard lens by me, congrats!

Lightshow · Joined: 04 Nov 2011 Posts: 3669 Location: Calgary

I have the Pentamatic 35/2.8 preset.

Very nicely built, quite sharp, but suffers from CA and veiling flare.
If yours is a Pentamatic lens, there is no adapter available, you can make an adapter to use it on NEX or other body,
All you need is an A-mount to NEX(or what ever mount) adapter, the front face of the adapter needs to be shaved down enough that the lens mounts and is snug, then the adapters mount that you just worked on needs to be removed so the body of the adapter can be shortened to permit infinity, I don't have the measurements handy, but I can provide them later.

bkwphoto · Joined: 29 Jul 2013 Posts: 8 Location: usa

Thanks for the replies! Lightshow thanks for the photos! It appears to be the pentamatic mount like yours. To bad to here about the adaptability. Probably just try to sell the lens.

Thanks again,
Brian

Lightshow · Joined: 04 Nov 2011 Posts: 3669 Location: Calgary

Lightshow · Joined: 04 Nov 2011 Posts: 3669 Location: Calgary

Just bought one a month ago... I should have some pics soon, top notch build quality.

jodtard · Joined: 22 Nov 2014 Posts: 13

The only 13.5 version with the pentamatic has removable mount via three tiny screws, just an FYI but not sure if the same maker for I have not found much info for it and does not have the "tominion" on its ring.
Have a very few ugly samples in this forum.

Lightshow · Joined: 04 Nov 2011 Posts: 3669 Location: Calgary

Here's a useful link for Yashica lenses.
http://www.captainchaoz.talktalk.net/yashica%20lenses2.htm
"Pentamatic Bayonet Fitting
Yashinon-R 1:2.8 f=3.5cm

Super Yashinon-R 1:2.8 f=3.5cm Tominon

Auto Yashinon 1:1.8 f=5.5cm

Auto Yashinon 1:1.7 f=5.8cm

Super Yashinon-R 1:2.8 f=10cm

Super Yashinon-R 1:2.8 f=10cm Tominon

Super Yashinon-R 1:2.8 f=13.5cm

Yashinon (180mm 1:3.5)"
To clarify, I have both Tominon lenses.

jodtard · Joined: 22 Nov 2014 Posts: 13

Lightshow,

There is Super yashinon-r 13.5cm f3.5 meant for pentamatic that exist, that I just saw today.
https://yashicasailorboy.com/2016/11/09/yashica-super-yashinon-r-lens-by-tomioka-optical/

vivaldibow · Expire: 2021-03-09

jamaeolus · Expire: 2015-08-20

Lightshow · Joined: 04 Nov 2011 Posts: 3669 Location: Calgary

vivaldibow · Expire: 2021-03-09

vivaldibow · Expire: 2021-03-09

Lightshow · Joined: 04 Nov 2011 Posts: 3669 Location: Calgary

Yes, Pentamatic is relatively obscure, Konica F seems about as obscure, Topcon R was more common, well, in my experience, someone in Europe or Japan would likely have different experiences for how common different mounts were.
I came across my 3.5cm by chance, was immediately drawn to its build quality and after adapting it, its rendering. So happy it found me.