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cyberjunkie
Joined: 24 Mar 2010
Posts: 282
Location: Chiang Mai, Bologna, Amsterdam
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 Posted: Sun Jan 20, 2019 2:24 pm Post subject: |
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cyberjunkie wrote:
| fiftyonepointsix wrote: |
> Another issue I could not come up with is the existence of rebranded Komura-made optics.
(Cut from a post above)
I picked up a "Bitco Super Vemar" 135mm F3.5 in Leica mount, 46mm filter ring. It is identical to the 135/3.5 Super-Acall, so add another Komura Rebrand to the list. "Bitco"... this must be their brand designed for Digital Cameras.
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The kind of Komura lenses sold under Kyoei/Acall brand (and some other vendor brands as Bitco) seem to be more common in the latter versions than in the former.
The partly "silver" barrel (likely nickel plated brass) is not very common in Komura brand, at least from the (many) pictures I have seen.
Komura's LTM lenses are more common in all-black.
Considering the many iterations of barrel versions seen in other brands (like Enna and Isco for example), it's likely that the mostly plated barrel style predated the all-black one (which was followed in some brands by zebra versions).
It's not a rule though. Enna latest barrel style returned to (crinkled) all-black.
Would be interesting to have more catalogs spread over a longer period of time...
_________________
Pentax Bodies: 6x7, K2, MX, LX, Super A, Z-1, K-1, K-5 II, K-01, K10D, K200D
Other cameras: Leica CL, Leica M5, Rolleiflex, Mamiya Super 23, Horizont, and many bellows cameras from 4x5" to 8x10"
- Shooting only digital recently, FF and APS-C
- Collecting vintage large format lenses (plenty of them  )
- Looking for Pentax-A* 200mm Macro and Pentax-A* 1.8/135mm, Sigma 150mm or 180mm Macro PK, Sigma 50-500 AF PK, Enna 1.5/85mm M42; selling Pentacon Six/Pentax 67/Mamiya Press/Leica M/Rolleiflex/4x5"/Manfrotto stuff
MY BELOVED PK, M42 LENSES
Photographica sets
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fiftyonepointsix
Joined: 30 Apr 2017
Posts: 292
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| Posted: Sun Jan 20, 2019 11:37 pm Post subject: |
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fiftyonepointsix wrote:
I was able to get the 105mm F3.5 Komura apart: construction is the same as the chrome/black 135mm F3.5. The focus ring is on two parts, unscrewing them allows the outer helical to be unscrewed and accessed. Following lessons learned, I did not separate them. The old black grease was extermely thick, I used acetone to clean the helicals. Relubed with white lithium grease, very smooth now.
The focus is off, 4.5m RF reading when actual focus using a TTL viewer is 5m. The focus mount is the problem- it is too long and would have to be ground down to bring the optics in close-enough to the image plane to agree with the RF. I've done that on a 9cm F4 Elmar. I could also move the rear element in closer to the image plane using a secondary/homemade shim. OR- I will try adding a stand-off between the lens and an M-Mount adapter. This works as the RF calibration will change much faster than the actual focus. The RF calibration is a bit off- the actual target is much closer to what the TTL viewer indicates. All taps align with set screws, so the lens was not taken apart and re-assembled incorrectly. This came from the factory "a bit off". |
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kiddo
Joined: 29 Jun 2018
Posts: 1121
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| Posted: Mon Jan 21, 2019 5:29 pm Post subject: |
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kiddo wrote:
It is true that some good komura lens have been made around 60's , but it is amazing the quality of the mechanics,grease used in so many lenses ,like Septon DKL, Rokkor 55 1.7 ,komura etc. The few lenses i've got with stiff focus like Rokkor MD, helios ,do have better coatings but the smooth focus disapeared,so it is clear that there have been improvements between the 55-1975 in coatings (probably glass to), but weren't all positive though. |
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cyberjunkie
Joined: 24 Mar 2010
Posts: 282
Location: Chiang Mai, Bologna, Amsterdam
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| Posted: Wed Jan 23, 2019 11:13 am Post subject: |
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cyberjunkie wrote:
Found this Telesar 1:2.8 35mm in Exakta mount.
Could be a T-mount, which would probably rule out any affinity with Komura lenses, but there is something Komura-esque in the way it looks:-)
The "K" at the END of the serial number caught my attention.
What do you think?
Any of you owns anything similar?
_________________
Pentax Bodies: 6x7, K2, MX, LX, Super A, Z-1, K-1, K-5 II, K-01, K10D, K200D
Other cameras: Leica CL, Leica M5, Rolleiflex, Mamiya Super 23, Horizont, and many bellows cameras from 4x5" to 8x10"
- Shooting only digital recently, FF and APS-C
- Collecting vintage large format lenses (plenty of them )
- Looking for Pentax-A* 200mm Macro and Pentax-A* 1.8/135mm, Sigma 150mm or 180mm Macro PK, Sigma 50-500 AF PK, Enna 1.5/85mm M42; selling Pentacon Six/Pentax 67/Mamiya Press/Leica M/Rolleiflex/4x5"/Manfrotto stuff
MY BELOVED PK, M42 LENSES
Photographica sets
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kiddo
Joined: 29 Jun 2018
Posts: 1121
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| Posted: Wed Jan 23, 2019 7:36 pm Post subject: |
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kiddo wrote:
| cyberjunkie wrote: |
Found this Telesar 1:2.8 35mm in Exakta mount.
Could be a T-mount, which would probably rule out any affinity with Komura lenses, but there is something Komura-esque in the way it looks:-)
The "K" at the END of the serial number caught my attention.
What do you think?
Any of you owns anything similar?
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My komura 35mm 2.5 looks pretty much the same, it has maybe 10 blades? And of course double diafragm ring |
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kiddo
Joined: 29 Jun 2018
Posts: 1121
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| Posted: Fri Jan 25, 2019 8:48 am Post subject: |
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kiddo wrote:
SANKYO KOHKI JAPAN W-KOMURA f=35mm 1:2.5 it's got a longer focus barrel and different coloured numbers un barrel ,besides ,the3 same lens. Diameter 55mm. Mine is nikon mount,even though the mount can be changed |
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cyberjunkie
Joined: 24 Mar 2010
Posts: 282
Location: Chiang Mai, Bologna, Amsterdam
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| Posted: Sat Jan 26, 2019 7:34 am Post subject: |
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cyberjunkie wrote:
Another Komura rebrand:
Bittco Super Vemar 1:3.5 135mm LTM
Interestingly, more or less at the same time, another Bittco Super Vemar is clearly Sankor/Nissin made:
Bittco Super Vemar 1:3.5 135mm M42
P.S.
The last three lenses are no mine. I found the pictures online. Copyright belongs to the original poster.
I decided to post the photos because there are not many Komura rebrands. I find the matter interesting.
To add more uncertainty to the issue of Komura rebranding, I found this page (that deals with Nicca/Yashica rangefinder cameras):
http://www.yashicatlr.com/YE&YF.html
According to the author of the page, Kyoei was probably formed by former Komura employees. He also points to some minimal differences between Kyoei Acall and the almost identical variant sold as Komura. If Kyoei Optical really manufactured Acall lenses, they either copied Komura models or had some kind of cooperation agreement. IMHO the distance scale differences, with substantially identical barrel construction, are just minor details, that don't confirm the theory of the writer. If Acall and Bittco lenses were not rebrands, they were practically knock-off's (made under some kind of agreement/contract). Of course mine is just an hypothesis based on plain old common sense...
_________________
Pentax Bodies: 6x7, K2, MX, LX, Super A, Z-1, K-1, K-5 II, K-01, K10D, K200D
Other cameras: Leica CL, Leica M5, Rolleiflex, Mamiya Super 23, Horizont, and many bellows cameras from 4x5" to 8x10"
- Shooting only digital recently, FF and APS-C
- Collecting vintage large format lenses (plenty of them )
- Looking for Pentax-A* 200mm Macro and Pentax-A* 1.8/135mm, Sigma 150mm or 180mm Macro PK, Sigma 50-500 AF PK, Enna 1.5/85mm M42; selling Pentacon Six/Pentax 67/Mamiya Press/Leica M/Rolleiflex/4x5"/Manfrotto stuff
MY BELOVED PK, M42 LENSES
Photographica sets
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55
Joined: 13 May 2013
Posts: 709
Location: U.S.
Expire: 2022-06-15
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| Posted: Sun Jan 27, 2019 6:02 am Post subject: |
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55 wrote:
| cyberjunkie wrote: |
. . .
The other thing is the possible affinity between the UNI mount and the 47mm interchangeable screwmount used by Tokina. Both have the same diameter, but I have no idea if the register is the same. I have no lenses with Tokina M47 mount... so I'm asking for your help |
Based on two lenses I measured, the mounts are different.
My Komura 135 f/2.8's Uni. mount is approximately 48mm wide with a .75mm thread pitch.
And my (Tokina made) Vemar 135 f/2.8's mount is 47mm wide with a .8mm thread pitch.
My measuring tools aren't the best, but I believe they're essentially accurate. And just to be sure, I tried to fit the Vemar's 47mm adapter onto the Komura mount, but the Vemar adapter was too narrow. And, yes, the Uni. adapter was too wide for the Vemar/Tokina mount.
#1
Tim |
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cyberjunkie
Joined: 24 Mar 2010
Posts: 282
Location: Chiang Mai, Bologna, Amsterdam
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| Posted: Mon Jan 28, 2019 9:41 am Post subject: |
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cyberjunkie wrote:
| 55 wrote: |
| cyberjunkie wrote: |
. . .
The other thing is the possible affinity between the UNI mount and the 47mm interchangeable screwmount used by Tokina. Both have the same diameter, but I have no idea if the register is the same. I have no lenses with Tokina M47 mount... so I'm asking for your help |
Based on two lenses I measured, the mounts are different.
My Komura 135 f/2.8's Uni. mount is approximately 48mm wide with a .75mm thread pitch.
And my (Tokina made) Vemar 135 f/2.8's mount is 47mm wide with a .8mm thread pitch.
My measuring tools aren't the best, but I believe they're essentially accurate. And just to be sure, I tried to fit the Vemar's 47mm adapter onto the Komura mount, but the Vemar adapter was too narrow. And, yes, the Uni. adapter was too wide for the Vemar/Tokina mount. |
Very useful post.
Thanks.
It happens that I decided to put my posts on pause because of this issue.
Even non-UNI Komura lenses (those called fixed mount) seem to have a kind of removable ring.
For my own benefit, and to give correct information to other forum members, I decided to investigate if it's actually possible to exchange mounts.
Having found lenses from other makers that have interchangeable mounts that don't conform to the T-mount specs, I decided to order a cheap chinese instrument to measure the thread pitch. It's the metric one, so it won't work with british lenses. Maybe I have one Withworth pitch meter in Italy, I'll check in due time
By the way, I have a few preset lenses (not Komura) in the "right" mount (M42) that seem to have an adapter that does not look T-mount.
I didn't have screwdrivers under 1mm for some very small set screws. Now I got a set of watchmaker's screwdrivers, so I can check.
I am looking forward to share thread pitch and register of the few lenses I have with me.
Two more thing that are Komura specific:
I have seen UNI mounts with no set screws, that can be grabbed and unscrewed.
In picture I have seen what looks to be a UNI mount that has at least one radial set screw.
I also own myself a Komura 3.5/200mm in M42 mount that has a UNI mount with set screws on the flat part of the mount, facing the camera. No matter how much I force, the UNI mount doesn't come off, so I guess those screws need to be un-tightened to remove the mount.
I have also seen a nice Komura 2/105mm in Contax rangefinder mount. The mount itself is held by three set screws, so it might be removable. I am afraid the rangefinder coupling would get in the way, trying to adapt it to SLR cameras, but I'm still curious.
_________________
Pentax Bodies: 6x7, K2, MX, LX, Super A, Z-1, K-1, K-5 II, K-01, K10D, K200D
Other cameras: Leica CL, Leica M5, Rolleiflex, Mamiya Super 23, Horizont, and many bellows cameras from 4x5" to 8x10"
- Shooting only digital recently, FF and APS-C
- Collecting vintage large format lenses (plenty of them )
- Looking for Pentax-A* 200mm Macro and Pentax-A* 1.8/135mm, Sigma 150mm or 180mm Macro PK, Sigma 50-500 AF PK, Enna 1.5/85mm M42; selling Pentacon Six/Pentax 67/Mamiya Press/Leica M/Rolleiflex/4x5"/Manfrotto stuff
MY BELOVED PK, M42 LENSES
Photographica sets
On sale |
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cyberjunkie
Joined: 24 Mar 2010
Posts: 282
Location: Chiang Mai, Bologna, Amsterdam
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| Posted: Mon Jan 28, 2019 3:40 pm Post subject: |
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cyberjunkie wrote:
Talking of Kyoei Acall made by Komura = YES, Kyoei Acall made by Komura = NO,
I just won another Acall 3.5/135mm.
The other I have is a Super Acall in LTM mount, with original accessory finder.
The seller advertised the lens below as Leica mount, but I have serious doubts.
1) It has a preset ring
2) I don't see the rangefinder coupling
MAYBE it's M42. What do you think?
The bent filter ring that sits on top of the lens is not uncommon. I have seen it on other Acall lenses.
My best guess is that it could be a Series to regular filter adapter
_________________
Pentax Bodies: 6x7, K2, MX, LX, Super A, Z-1, K-1, K-5 II, K-01, K10D, K200D
Other cameras: Leica CL, Leica M5, Rolleiflex, Mamiya Super 23, Horizont, and many bellows cameras from 4x5" to 8x10"
- Shooting only digital recently, FF and APS-C
- Collecting vintage large format lenses (plenty of them )
- Looking for Pentax-A* 200mm Macro and Pentax-A* 1.8/135mm, Sigma 150mm or 180mm Macro PK, Sigma 50-500 AF PK, Enna 1.5/85mm M42; selling Pentacon Six/Pentax 67/Mamiya Press/Leica M/Rolleiflex/4x5"/Manfrotto stuff
MY BELOVED PK, M42 LENSES
Photographica sets
On sale |
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fiftyonepointsix
Joined: 30 Apr 2017
Posts: 292
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| Posted: Mon Jan 28, 2019 5:06 pm Post subject: |
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fiftyonepointsix wrote:
It is not Leica mount- the rear element is too close to the mount. Probably M42 mount. |
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55
Joined: 13 May 2013
Posts: 709
Location: U.S.
Expire: 2022-06-15
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| Posted: Mon Jan 28, 2019 6:52 pm Post subject: |
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55 wrote:
| cyberjunkie wrote: |
Very useful post.
Thanks. |
You're welcome.
| cyberjunkie wrote: |
It happens that I decided to put my posts on pause because of this issue. . .
. . .I decided to order a cheap chinese instrument to measure the thread pitch. |
I just recently bought my own thread pitch gauge. And I've found I need a magnifying glass to get close enough to see clearly because the differences in pitch can be so subtle.
| cyberjunkie wrote: |
| I am looking forward to share thread pitch and register of the few lenses I have with me. . . |
Yes, I'd be interested to hear what you discover.
Tim |
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Oldhand
Joined: 01 Apr 2013
Posts: 6009
Location: Mid North Coast NSW - Australia
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| Posted: Wed Dec 02, 2020 9:22 am Post subject: |
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Oldhand wrote:
Not mentioned so far in this thread:
Sankyo Koki Komura 105mm f2.8
Shorter than the 105mm f2.5
T
#1
#2
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liveactionhero
Joined: 02 Sep 2017
Posts: 2
Location: Japan
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| Posted: Sat Jan 29, 2022 10:25 am Post subject: |
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liveactionhero wrote:
| Quote: |
>Not mentioned so far in this thread:
>Sankyo Koki Komura 105mm f2.8
>Shorter than the 105mm f2.5
>T |
Hi there!
Some time has passed since this thread has last received any post...
Any new interesting contribution to the topic? I have been collecting info on the Komura 105mm f2.8 to write a little 'homework' about it. And I have been collecting and sorting out serials and characteristics of each one of them I stumbled upon on the net and around (I own three of them). The 105mm for SRL cameras is a short lived model which survives in not many copies. Can I ask the serial of the model posted above?
Cheers.
Michele |
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Oldhand
Joined: 01 Apr 2013
Posts: 6009
Location: Mid North Coast NSW - Australia
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| Posted: Sat Jan 29, 2022 11:16 am Post subject: |
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Oldhand wrote:
| liveactionhero wrote: |
| Quote: |
>Not mentioned so far in this thread:
>Sankyo Koki Komura 105mm f2.8
>Shorter than the 105mm f2.5
>T |
Hi there!
Some time has passed since this thread has last received any post...
Any new interesting contribution to the topic? I have been collecting info on the Komura 105mm f2.8 to write a little 'homework' about it. And I have been collecting and sorting out serials and characteristics of each one of them I stumbled upon on the net and around (I own three of them). The 105mm for SRL cameras is a short lived model which survives in not many copies. Can I ask the serial of the model posted above?
Cheers.
Michele |
Hi Michele,
yes the serial number is 3432093
#1
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Oldhand
Joined: 01 Apr 2013
Posts: 6009
Location: Mid North Coast NSW - Australia
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| Posted: Thu Mar 24, 2022 9:12 am Post subject: |
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Oldhand wrote:
Sankyo Kohki Komura 105mm f2.5
#1
#2
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D1N0
Joined: 07 Aug 2012
Posts: 2494
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| Posted: Fri Apr 08, 2022 2:57 pm Post subject: |
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D1N0 wrote:
Found a pdf with all of the earlier Komura's and what systems they will fit
https://www.pacificrimcamera.com/rl/01662/01662.pdf
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Doc Sharptail
Joined: 23 Nov 2020
Posts: 993
Location: Winnipeg Canada
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| Posted: Fri Apr 08, 2022 4:36 pm Post subject: |
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Doc Sharptail wrote:
Interesting link!
It looks as if Komura sure wanted to compete, and win...
-D.S.
_________________
D-810, F2, FTN.
35mm f2 O.C. nikkor
50 f2 H nikkor, 50 f 1.4 AI-s, 135 f3.5 Q,
50 f2 K nikkor 2x, 28-85mm f3.5-4.5 A/I-s, 35-105 3.5-4.5 A/I-s, 200mm f4 Micro A/I, partial list.
"Ain't no half-way" -S.R.V.
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D1N0
Joined: 07 Aug 2012
Posts: 2494
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| Posted: Fri Apr 08, 2022 4:59 pm Post subject: |
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D1N0 wrote:
They didn't survive though. Tokina, Tamron and Sigma did but they made good stuff.
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Phalbert
Joined: 17 May 2009
Posts: 359
Location: Namibia
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| Posted: Sun Apr 10, 2022 11:06 am Post subject: |
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Phalbert wrote:
Excellent info. It's missing the 80 and the 100mm f1,8 though. They must have come later.
_________________
🙋 My wishlist: Titan or Idaho 135/1,8 Nikon Df Nikkor 105/1,8 35/1,4 85/1,4
My dream lenses: Zuiko 180/2 Prototype Zuiko 85/1,4
Zeiss CY: 55/1,2 85/1,2
Astro Berlin 250/2 Canon EF 50/1,0 85/1,2
Nikkor 105/1,4 28/1,4
My stolen stuff: Zuiko 24/2 #106874; Zuiko 35-80/2,8 #102180; Zuiko 35/2 #119168; Zuiko 90/2 macro #102858; Zuiko x1,4 converter #102019; Tamron 17/3,5 #400567; Tamron 400/4 #80407; Soligor 135/2 #17506600 Sigma 28/1,8 #1001124 |
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Phalbert
Joined: 17 May 2009
Posts: 359
Location: Namibia
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| Posted: Sun Apr 10, 2022 11:18 am Post subject: |
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Phalbert wrote:
There seems to be a 36mm f1,8
https://m.facebook.com/j2camera/photos/%E5%B9%BB%E3%81%AE%E3%83%AC%E3%83%B3%E3%82%BA%E3%82%AF%E3%83%A9%E3%82%B9%E3%81%A7%E3%81%99%E3%81%8B%E3%81%AD%E3%83%A9%E3%82%A4%E3%82%ABl%E3%83%9E%E3%82%A6%E3%83%B3%E3%83%88%E3%82%B3%E3%83%A0%E3%83%A9%E3%83%BC36mm-f18%E3%81%A7%E3%81%99/1581251921914286/
The viewfinder seems to indicate a use with RF cameras.
_________________
🙋 My wishlist: Titan or Idaho 135/1,8 Nikon Df Nikkor 105/1,8 35/1,4 85/1,4
My dream lenses: Zuiko 180/2 Prototype Zuiko 85/1,4
Zeiss CY: 55/1,2 85/1,2
Astro Berlin 250/2 Canon EF 50/1,0 85/1,2
Nikkor 105/1,4 28/1,4
My stolen stuff: Zuiko 24/2 #106874; Zuiko 35-80/2,8 #102180; Zuiko 35/2 #119168; Zuiko 90/2 macro #102858; Zuiko x1,4 converter #102019; Tamron 17/3,5 #400567; Tamron 400/4 #80407; Soligor 135/2 #17506600 Sigma 28/1,8 #1001124 |
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calvin83
Joined: 12 Apr 2009
Posts: 7554
Location: Hong Kong
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| Posted: Sun Apr 10, 2022 2:20 pm Post subject: |
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calvin83 wrote:
I almost won a 36mm many years ago. Sadly, I never see another copy of affordable price afterward. 
BTW, there is one on ebay now.
Click here to see on Ebay
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https://www.instagram.com/_lens_fever/
The best lens is the one you have with you. |
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calvin83
Joined: 12 Apr 2009
Posts: 7554
Location: Hong Kong
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| Posted: Sun Apr 10, 2022 2:39 pm Post subject: |
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calvin83 wrote:
| Phalbert wrote: |
Excellent info. It's missing the 80 and the 100mm f1,8 though. They must have come later. |
I belive both of them are made in the 1950s. Some of them have 6-digit serial number. The Konica FP on the pdf is announced in 1963 which indicate the PDF is from the mid 1960s.
This is an ads in Feb 1960 Modern Photography.
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https://www.instagram.com/_lens_fever/
The best lens is the one you have with you. |
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jmkmva
Joined: 25 Nov 2010
Posts: 78
Location: MidAtlantic US
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| Posted: Sun Apr 10, 2022 4:29 pm Post subject: |
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jmkmva wrote:
http://forum.mflenses.com/userpix/20224/big_1380_1960_1.jpg
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.
Komura is not included on most lists of radioactive lenses. This - despite the large number of high speed lenses they produced. IMO, Komura is not likely the only omission.
Anyway, I prefer my thorium in Asahi and Canon. |
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D1N0
Joined: 07 Aug 2012
Posts: 2494
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| Posted: Sun Apr 10, 2022 9:22 pm Post subject: |
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D1N0 wrote:
The 80 and 100 had probably already been discontinued when the dealer flyer was made. The newer super-komuras aren't on there either.
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pentaxian |
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