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kuuan
Joined: 14 Jan 2008
Posts: 4569
Location: right now: Austria
Expire: 2014-12-26
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 Posted: Sat Jul 11, 2009 7:01 pm Post subject: |
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kuuan wrote:
thank you PBFACTS for the clarification.
piticu the spelling of the name Koki, Kohki or whatever seems to vary because of varying transcriptions from japanese, yet another version on camerapedia: http://www.camerapedia.org/wiki/Sanky%C5%8D_K%C5%8Dki
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koji
Joined: 21 Jul 2008
Posts: 2107
Location: Hiroshima, Japan
Expire: 2012-12-27
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| Posted: Sat Jul 11, 2009 7:35 pm Post subject: |
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koji wrote:
"Kohki" is Hepborn-style spelling used to be used, nowadays we drop "h".
HEPBURN (wikipedia) -> http://en.wikipedia.org/wiki/James_Curtis_Hepburn
This person is a relative of american actor "Katherine Hepburn".
"h" after a bowel indicates "o" to be pronounced long "o", so my name
should spell "kohji" in a colloquial sense, also should spell "kouji" in
japanese older writing way.
So "kouki" is closer to slow pronounciation, "kohki" is typical way we
occasionally spell. "koki" is a bit confusional, since it has different meanings.
This is the main reason we still spell "kohki" instead of modern "koki".
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piticu
Joined: 04 Aug 2008
Posts: 591
Location: Romania
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| Posted: Sat Jul 11, 2009 9:00 pm Post subject: |
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piticu wrote:
Kuuan and Koji, thank you very much for your explanations. What i was trying to ask PBFACTS is if he/she saw on the lens' rim that transliteration cause on mine says Kohki. I was just curious 
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Davidus
Joined: 07 Oct 2009
Posts: 190
Location: Prague, CZE
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| Posted: Tue Dec 01, 2009 7:29 pm Post subject: |
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Davidus wrote:
Hi.
I can buya Komura 300/5. Does anybody know this lens? I'm not sure, if it is good choice...
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Tue Dec 01, 2009 7:38 pm Post subject: |
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luisalegria wrote:
I have two Komura 5/300, both are very soft wide open, maybe the worst 300mm's I have. I got the other only to get the M39-M42 mount for my other "Visoflex" style Komuras.
The 300mm is the poorest of the Komura tele line I think.
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Davidus
Joined: 07 Oct 2009
Posts: 190
Location: Prague, CZE
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| Posted: Tue Dec 01, 2009 7:46 pm Post subject: |
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Davidus wrote:
Thanks.
I'll probably let it go. So any other recommendation in 300mm? But please resonable price. I'm not Rotchild 
M42, but not only...
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Tue Dec 01, 2009 7:53 pm Post subject: |
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luisalegria wrote:
There are many better 300mm
Some cheap ones -
Tokina automatic 5.5/300 sold as Soligor, Vivitar, Lentar, Hanimex, etc. Heavy but usually very good.
Tokina preset 5.5/300 sold as many different brands. Long minimum focus though.
Tamron Adaptamatic 5.6/300
Tamron preset 5.6/300 - Sold as Aetna Rokunar, Coligon, Soligor, etc. also.
Asahi Takumar 6.3/300 (maybe US $80+, so not that cheap)
There are also several made by Cosina and sold under many brands, including a Cosina-made 60-300 zoom that is very good.
All are probably much better than this Komura.
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Davidus
Joined: 07 Oct 2009
Posts: 190
Location: Prague, CZE
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| Posted: Tue Dec 01, 2009 10:34 pm Post subject: |
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Davidus wrote:
Thank you.
So my max is 100 euros. I think it is enough for some decent lens.
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Arkku
Joined: 28 Feb 2007
Posts: 1416
Location: Helsinki, Finland
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| Posted: Sun Dec 06, 2009 11:42 pm Post subject: |
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Arkku wrote:
I have the Komura 105mm f/2.5. Regarding the spelling, it reads “Sankyo Kohki” on the lens itself, so I guess that's the “official” transliteration. It's a funny lens; very thin, long, completely unusual filter thread sizes (two of them; the original hood mounts with a step-up ring), plenty of aperture blades.
In practice I find that it's somewhat soft wide open, but with a relatively pleasant soft glow. Bokeh can be very smooth, especially wide open, but it's somewhat swirly.
A couple of bokeh samples (wide open or thereabouts):
 
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Sun Dec 06, 2009 11:53 pm Post subject: |
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Attila wrote:
Looks a very nice lens to me. I had two of them 135mm f.5 and 200mm f4 none of them was sharpness or bokeh champion , but their color was better than most of my lenses. Congrats for this rare and nice piece!
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Arkku
Joined: 28 Feb 2007
Posts: 1416
Location: Helsinki, Finland
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| Posted: Mon Dec 07, 2009 11:30 am Post subject: |
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Arkku wrote:
| Relayer wrote: |
| nice, thank you. can you compare performance of this lens with Nikkor/Rokkor/Spiratone/Tamron 2.5/105 ? its very interesting for me, because I love and collect 100mm lenses :) |
The only other ~100mm lens I have is the MC Kaleinar-5N. The Kaleinar is sharper, especially wide open (though so are most other lenses), but less “smooth”. The coatings in my Kaleinar are damaged, which is probably why both are low in contrast. |
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Olivier
Joined: 18 Feb 2009
Posts: 5083
Location: France
Expire: 2015-08-06
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| Posted: Mon Dec 07, 2009 10:17 pm Post subject: |
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Olivier wrote:
Davidus, you should consider the Tair-3 4.5/300 very closely.
Some go for cheap.
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hinnerker
Joined: 17 Aug 2009
Posts: 929
Location: Germany near Kiel
Expire: 2015-08-09
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| Posted: Mon Dec 07, 2009 10:37 pm Post subject: |
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hinnerker wrote:
| Olivier wrote: |
Davidus, you should consider the Tair-3 4.5/300 very closely.
Some go for cheap. |
#1
Cheers
Henry
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Sculptur
Joined: 08 Feb 2010
Posts: 29
Location: Amsterdam
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| Posted: Wed Jun 23, 2010 3:32 pm Post subject: |
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Sculptur wrote:
[quote="Arkku"]I have the Komura 105mm f/2.5. Regarding the spelling, it reads “Sankyo Kohki” on the lens itself, so I guess that's the “official” transliteration. It's a funny lens; very thin, long, completely unusual filter thread sizes (two of them; the original hood mounts with a step-up ring), plenty of aperture blades.
In practice I find that it's somewhat soft wide open, but with a relatively pleasant soft glow. Bokeh can be very smooth, especially wide open, but it's somewhat swirly.
Somewhat late reply, I just ordered the same 105/2.5 lens for 27 pounds.
It looks like new with leather box and all.
Not so long ago I bought a Komura 135/3.5 in Leica mount with 12 blades.
It is quiet nice, not razorsharp but great bokeh.
Here are some samples.
In nr 3 you can see the starshaped lenblades.
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Isco- Göttingen: Berolina-Westromat 35/2.8 (Exakta mount), Isconar 50/2.8(Exakta mount),135/3.5 (Exakta mount),
Isconar 100/4 (Exakta mount)
Komura:135/3.5 (Leica Mount), 105/2.5 (M42 mount)
Konica Hexanon AR: 28/3.5, 40/1.8, 50/1.7, 50/1.4, 135/3.5, 135/3.2, 200/3.5
Leica R: Elmarit 90 /2.8, Elmarit 135 /2.8, APO Telyt 180/3.4
Meyer: Lydith 30 /3.5 (Exakta mount), Domiplan 50/2.8, Orestor (zebra)100 /2.8 (M42 mount), Orestor (zebra) 135/2.8 (M42 mount), Primotar 180/:3.5, Orestor (zebra) 200/4 (M42 mount), Orestor 300/(M42 mount), Telemegor 300/4.5
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Nikkon: Nikkor-P.C 105/2.5, Nikkor-H 50/2
Novoflex: Macro bellow (Canon FD mount, Macro 60/4 (Canon FD mount)
Olympus OM Zuiko: 24/2.8,28/2.8, 35/2.8, 50/1.8, 50/1.4, 100/2.8, 135/3.5, 200/4, 300/4.5
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Robotar: 35/2.8
Russian: Volna-3 85/2.8, Jupiter 9 85/2 (M42 mount), Industar-61 50/2.8 (M42 mount)
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Voigtländer: Super Wide Heliar 15/4.5 en Nokton 50/1.5
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D1N0
Joined: 07 Aug 2012
Posts: 2536
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| Posted: Sat Jan 15, 2022 2:38 pm Post subject: |
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D1N0 wrote:
The Komura 200mm F4.5 (Sankyo Kohki Japan) seems to be a triplet. Sharpness is nothing to really write home about but probably can be improved when shooting in good lighting. The weather is drab today so ISO 2500.
 Faded gold by The lens profile, on Flickr
I sharpened this one a bit, also a slight crop
 Hayfeverkeh by The lens profile, on Flickr
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Sat Jan 15, 2022 4:20 pm Post subject: |
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luisalegria wrote:
I also found the Komura 200mm F4.5 SLR lens to be rather a weak item in the Komura range.
Not as bad as the 300 f/5 but IMHO its just for collectors.
There is a very different Komura 200/4.5 made for Leica screw mount, with rangefinder coupling (a bit famous for being the longest rangefinder coupled lens), that is actually rather better. Its not a triplet, as far as I can tell, I only partially disassembled the optical block but it seems to have a cemented pair in there.
Anyway, its no world beater but not the same and not as bad.
http://forum.mflenses.com/komura-200-4-5-leica-screw-mount-on-mini-bellows-t11128,highlight,%2Bkomura.html
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D1N0
Joined: 07 Aug 2012
Posts: 2536
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| Posted: Sat Jan 15, 2022 4:52 pm Post subject: |
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D1N0 wrote:
It has a grand total of 16 aperture blades though.
 16 by The lens profile, on Flickr
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martinsmith99
Joined: 31 Aug 2008
Posts: 6950
Location: S Glos, UK
Expire: 2013-11-18
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| Posted: Mon Jan 17, 2022 10:53 am Post subject: |
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martinsmith99 wrote:
Do the RF & SLR lenses both have this many aperture blades?
Some of those old samples taken above look very good. Surprised Attila wasn't blown away.
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D1N0
Joined: 07 Aug 2012
Posts: 2536
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| Posted: Mon Jan 17, 2022 8:07 pm Post subject: |
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D1N0 wrote:
Got this from an Ebay post of the RF model. (Looks a bit different from the slr model, no preset aperture (or maybe a hidden one like with Meyer Optik Lenses) but same blade count. https://www.ebay.com/itm/114930232021?
Rangefinder version is much more expensive than the SLR version, but Ebay prices so who knows... Probably a different optical formula from the slr lens.
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