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Yashica 50mm f/1.9 M42
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PostPosted: Wed Mar 26, 2014 5:43 pm    Post subject: Yashica 50mm f/1.9 M42 Reply with quote
Is it any good? Can it be used on my Pentax K-5?






PostPosted: Wed Mar 26, 2014 5:46 pm    Post subject: Reply with quote
I had one for a while, works fine on the K-5 and is a pretty decent lens. The only problem you'll run into is the lack of auto/manual switch for the aperture. You either need a special adapter that presses in the aperture pin or you need to find some other way to hold it down.

I ended up just gluing the pin down on mine.


PostPosted: Wed Mar 26, 2014 5:58 pm    Post subject: Reply with quote
Thanks. Might give it a try then. Will the focus work from close to infinity too?

Would this be a good adapter?

http://www.ebay.com/itm/Focus-Infinity-M42-Lens-Mount-Adapter-For-PK-Pentax-K10D-K20D-KM-K7-K200D-TR-/310728079180?pt=AU_FILM_CAMERAS&hash=item4858d6374c


PostPosted: Wed Mar 26, 2014 6:06 pm    Post subject: Reply with quote
Mimik wrote:
Thanks. Might give it a try then. Will the focus work from close to infinity too?

Yes, all M42 lenses will focus to infinity with the right adapter.

Mimik wrote:

Would this be a good adapter?

If you are OK with gluing the pin down it will work, if you don't hold the aperture pin down the lens will stay wide open. I prefer to remove the clip on those cheap ones because they have a tendency get get stuck in the body.

To have full aperture control without modifying the lens you'd need an adapter like this Kipon one.
http://www.kipon-usa.com/kipon-m42-lens-to-pentax-p-k-camera-body-adapter-with-inner-ring.html


PostPosted: Wed Mar 26, 2014 6:18 pm    Post subject: Reply with quote
Thanks. Then I might just glue it down like you did.

I also have a Helios 44-2 with M42 mount. Should be fun to play with.


PostPosted: Wed Mar 26, 2014 10:07 pm    Post subject: Reply with quote
It is a very good, and under-rated lens I think.
Usually can be found very cheaply.
Produces results very similar to other good quality 50mm lenses of the period.
Here are some samples taken on K-10D
OH







PostPosted: Wed Mar 26, 2014 10:52 pm    Post subject: Reply with quote
For overall image quality I definitely couldn't fault mine, it was a pretty solid performer even wide open, it was just lacking character. It just didn't have anything that made it stand out against my other 50s.
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