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Thread: Any reviews of MS Optical C/T mount adapter?

  1. #1
    Ranger 9
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    Any reviews of MS Optical C/T mount adapter?

    Now that using Leica M-mount lenses on a G1 has become old hat, and all the cool kids have moved on to using C-mount cine lenses, I want to look into playing that game.

    Besides, there's a local camera show coming up next month where, in the past, scads of ugly old C-mount lenses have been available at junk-box prices; you know, "Anything in this box $1" -- and I want to be able to scoop up some bargains before word begins getting around about the kinds of results Peter Mc and Vivek and Monza et al have been getting.

    So the question becomes "What C-mount adapter should I buy?" and I wondered if anyone knew about this one newly announced by Japan Exposures:



    I'm sure Dirk wouldn't be selling it if it were too junky, and I like the idea of having the T-mount thread to double my craziness opportunities.

    However, I've been reading posts here about mechanical-interference issues when mounting some C-mount lenses on some adapters, and wonder if the addition of the T thread would make this one more likely to have problems. Also, this info on the product page makes it sound as if the screws that secure the inner insert are somewhat delicate.

    Does anyone here have experience with this adapter to give me a read on whether it works well? Or would I be better off waiting for my new best pal Ronn Jin (who seems like a stand-up guy even if his OEMs can't read a micrometer for beans) to pull a C-mount adapter out of his Chinese magic hat? Or something else?

  2. #2
    Super Duper
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    Re: Any reviews of MS Optical C/T mount adapter?

    It just became available a couple of days ago. I have one en route...will be happy to report when it arrives.

  3. #3
    butterdada
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    Re: Any reviews of MS Optical C/T mount adapter?

    Mr. Hawk'c adaptor made from from Taiwan is more cheaper.
    Function is OK.
    http://cgi.ebay.com.hk/ws/eBayISAPI....3A1|240%3A1318

  4. #4
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    Re: Any reviews of MS Optical C/T mount adapter?

    Quote Originally Posted by butterdada View Post
    Mr. Hawk'c adaptor made from from Taiwan is more cheaper.
    Function is OK.
    http://cgi.ebay.com.hk/ws/eBayISAPI....3A1|240%3A1318
    Thank you for this info. Is this the adapter you used for the excellent pictures in your other thread?

  5. #5
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    Re: Any reviews of MS Optical C/T mount adapter?

    Speaking of C-mount adapters, I see that RJ ("jinfinance" on eBay) also has his C-mount adapter out.



    He claims no mechanical interference with lenses having a base diameter up to 37.2mm, which is a bit larger than permitted by Mr. Hawk's adapter (36.5mm.) I will be interested to see how this compares to the Japan Exposures adapter and am looking forward to Monza's review of it.

    Incidentally, it seems lucky that such a variety of adapters is already available and most of the prices seem moderate. Since mounting the adapter in the camera and then interchanging threaded C-mount lenses would be slow compared to a bayonet mount, I can imagine using one or two favorite C-mount lenses by buying adapters for them and leaving the adapter on the lens.

  6. #6
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    Re: Any reviews of MS Optical C/T mount adapter?

    Unfortunately many lenses are in the 39 to 40mm range...requiring the back of the lenses to be shaved:


  7. #7
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    Re: Any reviews of MS Optical C/T mount adapter?

    Wow, that's pretty impressive. Are you turning down the rear rings yourself, or do you have a machine shop that can do it?

    (I'll bet that we'll find a lot of modern C-mount lenses intended for TV use are going to have these large base diameters that require modification like Monza is doing. Old cine camera lenses seem likely to be smaller at the base because they had to fit on the three- or four-lens turrets that many of these cameras had.)

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    Re: Any reviews of MS Optical C/T mount adapter?

    Quote Originally Posted by monza View Post
    Unfortunately many lenses are in the 39 to 40mm range...requiring the back of the lenses to be shaved:
    That's a nice line of small lenses... I don't see the Pentax 25/1.4 though. Any news on that one?

  9. #9
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    Re: Any reviews of MS Optical C/T mount adapter?

    The Pentax is 2nd from the right. It's about the same size as a roll of 35mm film. Both the doggie shots in the other thread were taken with it.


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    Re: Any reviews of MS Optical C/T mount adapter?

    Quote Originally Posted by monza View Post
    The Pentax is 2nd from the right. It's about the same size as a roll of 35mm film. Both the doggie shots in the other thread were taken with it.
    Now I see it!

    Aha. Well, that was better than I expected. How is the lens on the camera? Too small to operate? I guess you had to remove the stop screws - does that mean the aperture and focusing ring are too little damped?

    From what I can see this far the lens is interesting as a possible working option, so any comments on it are welcome.

  11. #11
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    Re: Any reviews of MS Optical C/T mount adapter?

    I haven't had much time with these lenses yet, so I'll have a better report later. BTW, the two shots here were taken with the 25/1.4 Tevidon and the 25/1.4 Pentax, 16:9 format. These are not cropped.

  12. #12
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    Re: Any reviews of MS Optical C/T mount adapter?

    What are the other lenses in the photos?

    I can read the maximum apertures off the rings, and I can see the focal length of the lens on the right; otherwise...?

  13. #13
    wblynch
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    Re: Any reviews of MS Optical C/T mount adapter?

    Quote Originally Posted by monza View Post
    I haven't had much time with these lenses yet, so I'll have a better report later. BTW, the two shots here were taken with the 25/1.4 Tevidon and the 25/1.4 Pentax, 16:9 format. These are not cropped.

    The Pentax seems warmer and I don't see any corner vignetting

  14. #14
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    Re: Any reviews of MS Optical C/T mount adapter?

    First photo left to right:

    8.5/1.5 Cosmicar, 12.5/1.4 Cosmicar, 25/1.4 Tevidon, 12.5/1.3 Computar

    Second photo swaps the Pentax 25/1.4 for the Tevidon.

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    Re: Any reviews of MS Optical C/T mount adapter?

    Quote Originally Posted by monza View Post
    I haven't had much time with these lenses yet, so I'll have a better report later. BTW, the two shots here were taken with the 25/1.4 Tevidon and the 25/1.4 Pentax, 16:9 format. These are not cropped.
    First impression is OK then I guess, or at least not a disaster. I'm looking forward to anything more on the Pentax whenever you got the time.

  16. #16
    butterdada
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    Re: Any reviews of MS Optical C/T mount adapter?

    Quote Originally Posted by Ranger 9 View Post
    Thank you for this info. Is this the adapter you used for the excellent pictures in your other thread?
    I bought four C to M4/3 adaptor from him.
    Photos from such as Angenieux 25/1.4 was used with his adaptor.

  17. #17
    Senior Member m3photo's Avatar
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    Re: Tevidon in 16:9 format

    Quote Originally Posted by monza View Post
    ... the two shots here were taken with the 25/1.4 Tevidon and the 25/1.4 Pentax, 16:9 format. These are not cropped.
    G1 in 16:9 format (thank you Monza for the tip) + Carl Zeiss Jena DDR Tevidon 1.4 25mm lens @ 1/1000 f/4 ISO 100
    This lens is as yet unmodified so only short range focus possible - about a couple of metres at infinity setting from a couple of stops down - f/2.8-f/4.
    The image is a little oversharpened to better show on the web at 930 pixels wide what this little lens can do.

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    Re: Any reviews of MS Optical C/T mount adapter?

    So, the Tevidon needs machining--bummer--I'm still waiting for mine and the adapter too. I do have the Kern Switar 25/1.4. Nice chunk of a lens. Does this one need machining too? I hope not.

    Monza--have you posted pictures from the Cosmicars yet, and who makes them?

  19. #19
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    Re: Any reviews of MS Optical C/T mount adapter?

    Bill, the Cosmicar line was apparently bought by Pentax, I don't think that name is used anymore. The 8.5mm and 12.5mm do not cover the sensor. The 8.5mm actually extends a bit too far into the G1, it will conflict with the black baffle inside the sensor chamber. If you look at the 8.5 on the left, you can see there is a retaining ring that extends beyond the c-mount threads. Any lens that extends that far is a no-go, I think I can get the 8.5 to work by shaving a tiny bit off the retaining ring.

    If you send me your Tevidon and adapter I can machine them for you and align things so the focus scale is up.

    The Tevidons have apparently been snapped up and are no longer available for $40. Someone else has them for $100 now.

  20. #20
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    Re: Tevidon in 16:9 format

    Quote Originally Posted by m3photo View Post
    G1 in 16:9 format (thank you Monza for the tip) + Carl Zeiss Jena DDR Tevidon 1.4 25mm lens @ 1/1000 f/4 ISO 100
    This lens is as yet unmodified so only short range focus possible - about a couple of metres at infinity setting from a couple of stops down - f/2.8-f/4.
    The image is a little oversharpened to better show on the web at 930 pixels wide what this little lens can do.
    There have certainly been a lot of beautiful photos made with C-mount lenses in this forum lately. Makes me want to try out some C-mount lenses myself... the problem is that some of you are evidently such talented shooters that I suspect you could get beautiful photos through the bottom of a Coke bottle!

    (Anybody seen a bottom-of-a-Coke-bottle adapter for Micro Four Thirds yet?)
    Last edited by Ranger 9; 25th February 2009 at 09:01.

  21. #21
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    Re: Any reviews of MS Optical C/T mount adapter?

    I think Jinfinance is working on an adapter.

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    Senior Member m3photo's Avatar
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    Re: Coke Bottle Bottom-Adapter

    Quote Originally Posted by Ranger 9 View Post
    (Anybody seen a bottom-of-a-Coke-bottle for Micro Four Thirds yet?)
    Coke Bottle Bottom. Sounds quite rude this way, doesn't it?

    On a more serious note - I can confirm that Jinfinance (or Ron Jin to his friends) told me today that he's putting a Nikon F to m4/3 adapter on the market next month too.
    Last edited by m3photo; 25th February 2009 at 09:09.

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    Re: Any reviews of MS Optical C/T mount adapter?

    Quote Originally Posted by monza View Post
    Bill, the Cosmicar line was apparently bought by Pentax, I don't think that name is used anymore. The 8.5mm and 12.5mm do not cover the sensor. The 8.5mm actually extends a bit too far into the G1, it will conflict with the black baffle inside the sensor chamber. If you look at the 8.5 on the left, you can see there is a retaining ring that extends beyond the c-mount threads. Any lens that extends that far is a no-go, I think I can get the 8.5 to work by shaving a tiny bit off the retaining ring.

    If you send me your Tevidon and adapter I can machine them for you and align things so the focus scale is up.

    The Tevidons have apparently been snapped up and are no longer available for $40. Someone else has them for $100 now.
    I got my Tevidon when prices were still less than $100. When it arrives, and the adapter, I'll send them to you.

    Regarding the 12.5--how much of the sensor does it cover? Using Google ( imagine that! ) I found out who Cosmicar is

    Thanx!

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    Re: Any reviews of MS Optical C/T mount adapter?

    Hmm...I'll send you a photo later today...I'd say it covers enough of the sensor that if you crop it, it's actually more like an 18mm lens.

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    Re: Pentax 1" C-Mount 25mm f/1.4

    Has anyone ventured to buy this one:
    http://www.bhphotovideo.com/c/produc...1_C_Mount.html
    and if so, how does it perform on the G1? By the looks of it, it seems narrow enough for the adapter hence there being no need to machine it for infinity focus. Is this the dream lens we've been wanting instead of the $1000 PanaLeica weight?

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    Re: Any reviews of MS Optical C/T mount adapter?


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    Re: Pentax C-Mount 25mm

    [QUOTE=monza;79180]Venture earlier in the thread.QUOTE]
    Ah, so Bella and Cooper on the little Pentax. What's your overall opinion of this lens, then - worth a bite? (pun intended)
    I realise I must seem thick as I'd seen the picture of the 4 lenses already of course. The thing is, there seem to be more than one lens by the same name out there that are radically different to each other - namely, your Cosmicar 8.5mm f/1.5 isn't my Cosmicar 8.5mm f/1.5! So I was just making doubly sure.

  28. #28
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    Re: Any reviews of MS Optical C/T mount adapter?

    Well, I've frankly not had the time to shoot much with it at all, since it arrived a couple of days ago. My initial impressions, subject to change upon further review:

    1. It's extremely tiny, to the point of compromising ergonomics. Given time I could get used to the tiny aperture and focus rings. And being tiny has advantages. It's probably 1/10th the volume of the Pana-Leica 25/1.4, maybe less. Hey it's also about 1/10th the price. It's the same size as a 35mm roll of film. I thought Pen F lenses were small.

    2. It seems to be extremely sharp in the center, even wide open. Click on the photo below for 100% crop at f/1.4. (This is RAW converted to DNG and opened in PS CS3, no sharpening or other adjustments other than white balance.)

    3. It doesn't cover the sensor in 4:3, but it does in 16:9. I don't find this a problem as I like 16:9. Doesn't appear to have corner smearing except on 4:3 which is really a coverage issue, not the typical rangefinder lens smearing.

    4. No machining, its 30mm rear diameter will work on any c-mount adapter.

    5. Some barrel distortion, but not as much as the Tevidon.




    16:9, no cropping:


  29. #29
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    Re: Any reviews of MS Optical C/T mount adapter?

    I liked to see the size of the lens side by side more. Here are two pics with the G1 and without. Second with a few of my tiny lenses--left to right, 14-45 kit lens, 5cm/1.4 Millennium Nikkor, Leica 3.5cm/3.5 Summaron, and Kern Switar 25mm/1.4. I was surprised how heavy the Switar was, but even more surprised at how tiny it was. The film canister lid on the rear of the Mill Nikkor fits perfectly as a lenscap for the Switar

    Anyone know where i can find C mount rear caps?

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    Re: Any reviews of MS Optical C/T mount adapter?

    Quote Originally Posted by monza View Post
    1. It's extremely tiny,
    (...)
    3. It doesn't cover the sensor in 4:3, but it does in 16:9. I don't find this a problem as I like 16:9. Doesn't appear to have corner smearing except on 4:3 which is really a coverage issue, not the typical rangefinder lens smearing.
    I went ahead and ordered the Pentax 25/1.4 from B&H the other day. As you say, the prize and size are both a tenth of the monstrous Panasonic 25/1.4. I expect it to be of lesser quality but not down to a tenth...

    I also have a lens hood and a couple of filters on their way.

    But wth... it doesn't cover the sensor in 4/3 format? Lol, there is always something. Well, most of my images end up square anyway and there isn't alot of money involved in this tiny little CCTV lens.

    More to follow, /Jonas

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    Re: Any reviews of MS Optical C/T mount adapter?

    Quote Originally Posted by wjlapier View Post
    The film canister lid...fits perfectly as a lenscap for the Switar
    The Pentax nearly fits inside a film canister.

    Looking forwards to seeing more photos taken with the Switar.

    Don't know about rear caps...

  32. #32
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    Re: Any reviews of MS Optical C/T mount adapter?

    Quote Originally Posted by monza View Post
    It just became available a couple of days ago. I have one en route...will be happy to report when it arrives.
    Monza, have you recieved the adapter? How do you like it?
    Where is the T-Mount. I can't spot it on the photo.

    I'm looking for a short mFT to T-mount adapter. That's the only one I've found so far.

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    Re: Any reviews of MS Optical C/T mount adapter?

    I always wonder that should I have a Pentax 25mm f1.4.
    I have a Canon TV lens already and almost perform the same with similar specification.
    However, the minimum focus distance of Canon is 0.5m not as close as Pentax, which
    is 0.3m. But I think Pentax has a better build lens body and a less losen focus ring.

    But I got it just 1/3rd of the price of Pentax from ebay. It is a compromise.

  34. #34
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    Re: Any reviews of MS Optical C/T mount adapter?

    I'm not sure why MS Optical says it has a T-mount, it doesn't. It simply has a removable center ring so the lens can be oriented properly so the focus scale is up.

  35. #35
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    Re: Any reviews of MS Optical C/T mount adapter?

    Thanks, I will ask Japan Exposures how it is meant.
    Maybe one can mount a T2 dovetail ring to it. But I'm
    not sure there is a standard size for these.

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