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The Big Sankyo Kohki/Komura Thread
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PostPosted: Sun Apr 10, 2022 10:48 pm    Post subject: Reply with quote

jmkmva wrote:

Clearly no one was worried about thorium used in lenses in 1960. So much so it was a selling point! Not http://forum.mflenses.com/userpix/20224/big_1380_1960_1.jpg a secret. Smile


They mentioin "rare-earth" glass (usually lanthanum back then), not thorium!

S


PostPosted: Sun Apr 10, 2022 11:40 pm    Post subject: Reply with quote

There's a Super-Komura 100mm Prime F2.5 Nikkon NF from the seller conect2020 on ebay US, 150$ in new shape in case someone is interested.
Wonder is there's really any difference between the f1.8, f2 and f2.5 optics of komura


PostPosted: Mon Apr 11, 2022 11:56 am    Post subject: Reply with quote

kiddo wrote:
There's a Super-Komura 100mm Prime F2.5 Nikkon NF from the seller conect2020 on ebay US, 150$ in new shape in case someone is interested.
Wonder is there's really any difference between the f1.8, f2 and f2.5 optics of komura

All of them are 5 elements Ernostar. Which should behave similarly.

I had a copy 105mm F2.0. Pretty good performer.


PostPosted: Wed Apr 13, 2022 6:10 am    Post subject: Reply with quote

Sankyo Kohki Komura 105mm f2.5

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PostPosted: Wed Apr 13, 2022 12:54 pm    Post subject: Reply with quote

The 1.8 that i have seems no coated at all. Maybe the versions 2.0 and 2.5 have some kind of coatings?


PostPosted: Wed Apr 13, 2022 9:47 pm    Post subject: Reply with quote

Although slow to post in this thread, I thought I might have been one of the earliest posters of Komura lenses but I see Luis started back in 2008 while it took me until 2010 to discover them. I like the lenses, although I don't use them very much mostly due to having way too many other lenses. I like the 2.5/105 very much but will usually pick up my Nikkor P 2.5/105 instead. However, the Komura has the benefit of a more interesting iris when stopped down.

When I start wondering which lenses I like the best, I look at my usage as an indication. My Komura lenses are listed here, followed by the number of images taken with them.

4/24 (378)
2.5/105 (708)
2.8/135 (341)
3.5/135 (237)
3.5/200 (721)

I've found the 200mm to be more challenging but reasonably sharp at f/3.5 when the focus is nailed. The bokeh is the most pleasing.

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PostPosted: Wed Apr 13, 2022 11:46 pm    Post subject: Reply with quote

All 200mm lenses have pleasing bokeh if the background isn't close to the subject.


PostPosted: Fri May 20, 2022 9:28 pm    Post subject: My Komura Collection Reply with quote

Just ran into this long running topic on Komura lenses. Thought I'd send a pic of my collection, all in LTM which I
have accumulated over a 15 yr period. Obviously, the rarest piece is the 36MM/F1.8 which I search for many yrs
and ever since buying one about 5 ys ago, have only ever seen two offered for sale on Ebay.
I think the very first Komura I purchased was a Mint in the box, 100MM/F2 which was a super lens but I found it
much to large to use effectively on LTM cameras. It was every bit as good as a Canon 100mm/F2 which I also bought
and sold for the same reason. The 105mm/F2.5 is much easier to handle and only ever so slightly slower.


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