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Cosinon 50mm 1.7 M42 bokeh
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PostPosted: Tue Dec 22, 2015 7:41 pm    Post subject: Cosinon 50mm 1.7 M42 bokeh Reply with quote

Just got this lens and love it.
I think it's a combination between helios 40 and trioplan

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PostPosted: Tue Dec 22, 2015 7:52 pm    Post subject: Reply with quote

Makes me thirst for a good Champagne. Laugh 1


PostPosted: Tue Dec 22, 2015 9:07 pm    Post subject: Reply with quote

Like 1 Whoo Turtle

Yoda says: Cosinon 50 1.7 shop you must Idea


PostPosted: Sun Dec 27, 2015 12:37 pm    Post subject: Reply with quote

Not the sharpest lens...
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PostPosted: Mon Dec 28, 2015 12:40 am    Post subject: Re: Cosinon 50mm 1.7 M42 bokeh Reply with quote

mutusorin wrote:
Just got this lens and love it.
I think it's a combination between helios 40 and trioplan

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One glance at this and I can hear the sound of the cash register.
I sure wish those were gold thalers. Smile


PostPosted: Fri Jan 29, 2016 8:22 am    Post subject: Reply with quote

My images are not bokeh-rich......... sorry.
I have this lens and went to use t this afternoon.
I hope you don't mind me adding to yours.
I was gifted one of these in non working condition. It is now fully functioning thanks to my son.
I was trying it out on the lemon bush when some king parrots appeared at the feeder. It is amazing how close these birds will allow an unthreatening approach.
Even so, I have cropped the images of the parrots by almost half.
Here are the images.
OH


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PostPosted: Tue Feb 09, 2016 3:22 pm    Post subject: Reply with quote

I set myself this year not to buy other lenses only if I need a certain lens (... I left a door of escape Wink ).
A Cosinn 50 1.7 lens is on the way because I had read and view images on this topic Twisted Evil It is K mount, I hope to be the same optical formula with M42 version.


PostPosted: Tue Feb 09, 2016 8:26 pm    Post subject: Reply with quote

Any pictures of the lens? I can't find it on ebay..


PostPosted: Tue Feb 09, 2016 8:55 pm    Post subject: Reply with quote

vroger wrote:
Any pictures of the lens? I can't find it on ebay..


Here is mine Roger.
Not sure if they all look the same.
OH


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PostPosted: Wed Feb 10, 2016 2:04 am    Post subject: Reply with quote

edri wrote:
I set myself this year not to buy other lenses only if I need a certain lens (... I left a door of escape Wink ).
A Cosinn 50 1.7 lens is on the way because I had read and view images on this topic Twisted Evil It is K mount, I hope to be the same optical formula with M42 version.


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These are excellent sample photos! Unfamiliar with this lens as well. So, thanks to OP and Oldhand for posting....I think. Wink
(Another lens I didn't know I needed!)

Aside:
Other than the bubble machine that it is, as evident in the evening shots, the rest seemed oddly reminiscent of a M42 Auto Rikenon 50 f/1.7.
Always assumed it was made by Tomioka, but the swirly bokeh doesn't fit the pattern of known Tomioka-made 50 f/1.7 models, namely Yashinon. Those have the smooth melt away bokeh and are center sharp. The Rikenon is also a bit soft at f/1.7 like the above samples.

Now I wonder if it's a Cosina-made lens!
There is also a nearly identical 'EE' Rikenon except for that rear pin. That one seems to perform a bit sharper wide open.





PostPosted: Wed Feb 10, 2016 6:11 am    Post subject: Reply with quote

Yes it does look a little like the Auto Rikenon, however it is smaller overall and has a smaller filter thread - 49mm vs 52mm.
Here are some comparisons.
OH


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PostPosted: Wed Feb 10, 2016 3:17 pm    Post subject: Reply with quote

Thank you Thomas!
Definitive side by side comparison.


PostPosted: Wed Feb 10, 2016 4:28 pm    Post subject: Reply with quote

Looks like a nice lens! I think I'll have to buy it now heh Smile It will nicely complement my Cosinon 55/1.4 (which is also a very nice lens and I love it!)


PostPosted: Wed Feb 10, 2016 5:41 pm    Post subject: Reply with quote

Sweet looking bokeh and nice pics, not very sharp however...

The Topcor 50/1.4 seems to have a similar very bubbly bokeh like this lens .. so does the Fujinon 55mm f/2.2 and those lenses might be sharper

--mike


PostPosted: Thu Feb 11, 2016 10:41 am    Post subject: Reply with quote

leemik wrote:
Sweet looking bokeh and nice pics, not very sharp however...

The Topcor 50/1.4 seems to have a similar very bubbly bokeh like this lens .. so does the Fujinon 55mm f/2.2 and those lenses might be sharper

--mike


You might be right about sharpness (I have the Fujinon 50/2.2), but what makes this lens interesting is the fact that the bokeh looks like a mix of those soap bubble ones with the swirl effect of an Helios.


PostPosted: Sat Oct 24, 2020 2:55 am    Post subject: Reply with quote

Hello, good evening. I liked the sample photos that were posted. Do any of you know if the Cosinon F/1.8 50mm has the same rendering as this F/1.7 version? Both are M42 mount. These screenshots are the only information I could find about both lenses.

https://www.dropbox.com/s/dmd45019jf160tq/Screenshot_20201021-105146_Samsung%20Internet.jpg?dl=0

https://www.dropbox.com/s/iloe9mj9hei3hyk/Screenshot_20201021-103559_Samsung%20Internet.jpg?dl=0


PostPosted: Sat Oct 24, 2020 8:36 am    Post subject: Reply with quote

Most likely very similar. The 1.8 is as swirly as a helios

cosinon by The lens profile, on Flickr


PostPosted: Sun Oct 25, 2020 1:28 pm    Post subject: Reply with quote

D1N0 wrote:
Most likely very similar. The 1.8 is as swirly as a helios

cosinon by The lens profile, on Flickr


I own a Helios 44 and recently purchased the Cosinon 50mm F/1.8. Which will be arriving tomorrow. I was debating on whether I should purchase the Cosinon F/1.7 version. Since that is the one OP posted sample photos of. Just wish I knew if both have identical rendering. I don't want to waste my money if they do. Also, the Cosinon F/1.7 seems rare to find on Ebay. I take it they weren't mass produced?


PostPosted: Sun Oct 25, 2020 2:59 pm    Post subject: Reply with quote

Prince-Harbinger wrote:

D1N0 wrote:
Most likely very similar. The 1.8 is as swirly as a helios



I own a Helios 44 and recently purchased the Cosinon 50mm F/1.8. Which will be arriving tomorrow. I was debating on whether I should purchase the Cosinon F/1.7 version. Since that is the one OP posted sample photos of. Just wish I knew if both have identical rendering. I don't want to waste my money if they do. Also, the Cosinon F/1.7 seems rare to find on Ebay. I take it they weren't mass produced?


I am pretty sure there is not much difference between them. I think the Helios is a better lens on all counts except swirl which is near identical. Cosina wasn't a big brand but they did make a lot of third party. You can find the 50mm 1.7 in different guises.
http://m42lens.com/m42-lens-database/1368-exaktar-auto-50mm-f-1-7-16
http://m42lens.com/m42-lens-database/238-carenar-super-carenar-50mm-f-1-7-16
Some version of the Rikenon 50mm 1.7 also look just like it: https://www.ebay.com/itm/Ricoh-Auto-Rikenon-50mm-f-1-7-M42-Screw-Mount-Prime-Lens/264805531806?hash=item3da7a3c09e:g:hh4AAOSw~xFfGbKg

And there were 2 different 50mm 1.7's from Cosina. I just have the 1.8 so I wouldn't know if there is a difference
http://m42lens.com/m42-lens-database/1257-cosinon-auto-mc-50mm-f-1-7-16
http://m42lens.com/m42-lens-database/1413-cosina-cosinon-auto-mc-50mm-f-1-7-16-zebra


PostPosted: Sun Oct 25, 2020 4:08 pm    Post subject: Reply with quote

D1N0 wrote:
Prince-Harbinger wrote:

D1N0 wrote:
Most likely very similar. The 1.8 is as swirly as a helios



I own a Helios 44 and recently purchased the Cosinon 50mm F/1.8. Which will be arriving tomorrow. I was debating on whether I should purchase the Cosinon F/1.7 version. Since that is the one OP posted sample photos of. Just wish I knew if both have identical rendering. I don't want to waste my money if they do. Also, the Cosinon F/1.7 seems rare to find on Ebay. I take it they weren't mass produced?


I am pretty sure there is not much difference between them. I think the Helios is a better lens on all counts except swirl which is near identical. Cosina wasn't a big brand but they did make a lot of third party. You can find the 50mm 1.7 in different guises.
http://m42lens.com/m42-lens-database/1368-exaktar-auto-50mm-f-1-7-16
http://m42lens.com/m42-lens-database/238-carenar-super-carenar-50mm-f-1-7-16
Some version of the Rikenon 50mm 1.7 also look just like it: https://www.ebay.com/itm/Ricoh-Auto-Rikenon-50mm-f-1-7-M42-Screw-Mount-Prime-Lens/264805531806?hash=item3da7a3c09e:g:hh4AAOSw~xFfGbKg

And there were 2 different 50mm 1.7's from Cosina. I just have the 1.8 so I wouldn't know if there is a difference
http://m42lens.com/m42-lens-database/1257-cosinon-auto-mc-50mm-f-1-7-16
http://m42lens.com/m42-lens-database/1413-cosina-cosinon-auto-mc-50mm-f-1-7-16-zebra



Thanks for all the information. I appreciate it. You're right about the helios and I actually prefer it's build quality. Something about those silver lenses. I wasn't able to find the Carenar version on Ebay. I did check out that F/1.7 listing yesterday, but I didn't like the sellers reviews. I did read that Cosinon made lenses for the bigger brands. They didn't make many for themselves. Guess I'll take some test shots tomorrow, and see if I can reproduce the bokeh highlights the OP did with his shots. If it looks the same than I'll likely grab the Auto Rikenon 50mm F/1.7. As I really think it renders beautifully.