Yashica vintage lenses on mirrorless cameras

When I bought my first digital camera (a Fuji X-E1) I was looking to get some vintage lens (ie. lens I could afford) and came across a set of Yashica lens that had been collecting dust in my father's garage for ages.

Yashica ML 50mm

The ML 5o

The set has three lenses: a wide angle (Yashica DBS 28mm F/2.8) a standard lens (Yashica ML 50mm F/1.9) and a telephoto zoom (MC Busch auto zoom 70-140 F/3.8) plus a 2x teleconverter.
So I purchased a C/Y to FX adapter and started taking photos.

Yashica DSB 28mm

The DSB 28

For some reason the 28mm used with the adapter is very hard to focus with, I rarely use that. The 70-140 is a bit soft, even if I stop the lens down, and only gets worse with the teleconverter, but considering that is used on a crop sensor camera I have an effective range of 105-210 or a massive 210-420 with the 2x on!

70-140mm with teleconverter and adpaterThe 70-140, a quite big lens, especially for a mirrorless!

On the other side the 50mm is optically perfect and has super smooth focus and aperture ring!

A tired supermodel cat
The 50mm is the real superstar

But, obviously it had a problem. The aperture blades wouldn't move, no matter how much you'd play with the ring.

bokeh

Stuck open. Not a problem right?

After a while I ended up opening the lens and, to my surprise, moving the aperture control from the inside actually opened and closed the blades! Apparently the years of inactivity had taken a toll on the ring, so just resitting the ring and lever made the trick.

the 50mm without back cover and bayonet, lens porn!

I really opened it!

I really liked the lens even when it was stuck, but now that is fully functional again it is often attached to my X-T20!
Here's a little gallery with some shots taken with the 50mm!