Komura 1.8/100

voytek · Joined: 24 Nov 2009 Posts: 891

Regarding size and weight it can compare to newer line of 2.8/135 lenses, a bit heavier then Pancolar1.8/50 zebra and a bit bigger then Vivitar 2.5/28. Smaller then Tamron 2.8/90 AD2. This is rather small lens. I do not know is this information valuable.
At the photo below with Tamron 2.8/90 AD2 - Komura with Uni mount and M42/PK, Tamron - "naked"

taunusreiter · Joined: 20 Mar 2007 Posts: 127

S/N 65506

Lens was discussed here before: http://www.rangefinderforum.com/forums/showthread.php?t=53934

I've found the results on my Spotmatics very pleasing, but the nearest distance isn't very close (1.4m/ 4.5ft). It's a very short and lightweight lens for a fast 100mm. It's about the size of the early postwar Biotar 75/1.5, which wasn't particular heavy.
Probably the 100/1.8 is an Ernostar design, like most fast telephotos made by Komura. I've just seen a diagram from the 100/2.0 which was made in 1964, some years before, but looks very similar to the 100/1.8 from outline.
All of them seem to be in small S/N range of about 65,xxx-66,xxxx. Probably production was ~ 1,000 or lower.

John Shriver · Joined: 24 Dec 2009 Posts: 193

My Komura 100/1.8 is serial number 68xxx, so there's probably more than 1000 made.

The rear element is really large, but far from the lens mount. I suspect that the Exakta Unidapter mount I have on it for use on my Topcon "constrains" the light somewhat, due to the small "throat" of the Exakta mount.

taunusreiter · Joined: 20 Mar 2007 Posts: 127

Phenix jc · Joined: 19 Dec 2009 Posts: 398 Location: France

One of my old dream ;
Miss this one on the bay :

Very rare

egidio · Joined: 02 Sep 2009 Posts: 222 Location: slovenia

very nice lens!

woodrim · Joined: 14 Jan 2010 Posts: 4060 Location: Charleston

Very interesting. Some might remember I recently purchased an INA 180mm lens that we knew very little about. I looked at another INA which was a 135mm and the seller said "twin KOMURA Sankyo KOHKI JAPAN , produced in the same factory". It has 12 blades to diaphragm if I counted right. Is there anything that might be unique to a Komura build?

woodrim · Joined: 14 Jan 2010 Posts: 4060 Location: Charleston

Attila: I saw from a couple of years ago you had a Komura 135mm. How was that lens? From the samples I've seen, the Komura bokeh looks exceptional.

luisalegria · Expire: 2018-01-18

I have two Komura 135's in M42, f/2.8 and 3.5

Bokeh is excellent, but the distinguishing feature is the handling of color.

Phenix jc · Joined: 19 Dec 2009 Posts: 398 Location: France

John Shriver · Joined: 24 Dec 2009 Posts: 193

Someone asked the weight -- a hefty 19 ounces.

It takes 62mm filters.

I got mine for $120 in 2004 on eBay. Came with M42 Unidapter mount, had to buy the 135/2.8 to get Exakta Unidapter mount. (That only cost $13.)

caspert79 · Joined: 31 Oct 2010 Posts: 2927 Location: The Netherlands

Seems to be a more than great lens, I'm very jealous!

spleenone · Joined: 26 Dec 2009 Posts: 1130 Location: Slovakia

Pics looks like from some cine lens. Amazing. Congrats.