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Thread: The China-made Leica M -> m4/3 Adapter

  1. #1
    wslam
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    The China-made Leica M -> m4/3 Adapter

    http://photos.lam.ws/gallery/7271130_NtHGF

    Very very fun. A cheap way to use my leica lenses in the digital era.
    I also have the Jap adapter on order. But the China-made one seems to be very ok.

  2. #2
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    Re: The China-made Leica M -> m4/3 Adapter

    Does actual focus distance match the indicated distance on the lens?

  3. #3
    wslam
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    Re: The China-made Leica M -> m4/3 Adapter

    Yah, I think so... I dont have the right instruments to accurately verify the distance right now, but it looks to be right...

    and FYI, you can leave the adaptor on the camera and change lens.
    Last edited by wslam; 3rd February 2009 at 22:43. Reason: Extra info

  4. #4
    wslam
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    Re: The China-made Leica M -> m4/3 Adapter

    Quick Question.
    When one uses Leica M lenses on the G1, I have the camera set to Aperture Priority, focus... now is there anyway for me to control the shutter speed?

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    Re: The China-made Leica M -> m4/3 Adapter

    Use +/- compensation for exposure.

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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by wslam View Post
    Quick Question.
    When one uses Leica M lenses on the G1, I have the camera set to Aperture Priority, focus... now is there anyway for me to control the shutter speed?
    The question is a bit strange...

    In classic photography the answer would be no... If you have set the aperture value to anything you would like the light and film speed would determine the shutter speed...

    Now we can set the aperture value to anything we like and then we can have the camera set the shutter time according to the ISO and the light, but we can also change the ISO value while keeping the aperture value and change the shutter time accordingly.

    Pressing the front wheel will let you set exposure compensation, is that it?

    But all this you know. What is it I don't understand with your question?

  7. #7
    wslam
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    Re: The China-made Leica M -> m4/3 Adapter

    Sorry, yes idiotic question! I am totally embarassed... what happened was that I had it on Auto ISO and ISO was changing behind the scene... so I thought the shutter speed was stuck at 1/30! haha... Pls ignore! I was about to come back to the forum to delete my question! but you caught me! haha

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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by wslam View Post
    Sorry, yes idiotic question! I am totally embarassed... what happened was that I had it on Auto ISO and ISO was changing behind the scene... so I thought the shutter speed was stuck at 1/30! haha... Pls ignore! I was about to come back to the forum to delete my question! but you caught me! haha
    Ah, so that's what happened... happened with what? I don't remember... not what, where, how or even who...

  9. #9
    wslam
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    Re: The China-made Leica M -> m4/3 Adapter

    =))

    Ok, I have done some more testing.
    The adapter is very reasonably machined.
    I only have 2 comments.
    1) The 'button' that you push down to release the lens 'wobbles' when no lens is attached. It is actually ok solid, but because it moves, it just seems a bit fragile.
    2) The lens can be mounted 'beyond' the click... if you hold down the lens release button, you can keep turning the lens...Again, this is no big deal. You wont run into the problem unless you *try*.

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    Senior Member petermcwerner's Avatar
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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by wslam View Post
    =))
    1) The 'button' that you push down to release the lens 'wobbles' when no lens is attached. It is actually ok solid, but because it moves, it just seems a bit fragile.
    I received mine today. It is well machined and does not have this problem.
    It is also much nicer to mount on the G1 than the Novoflex, it turns in place with the smoothness of butter and then stays well in place, reminding me of the precision engineering of the Alpa Reflex.
    Finally, the main advantage has already been mentioned: you can leave the adapter in place on the camera while changing lenses. No need to machine away anything.
    Peter Werner
    Leica M8, R9+DMR & Digilux 2; Nikon D700; Panasonic FX01, FX150 & G1; Samsung TL350 (WB 2000)

  11. #11
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    Re: The China-made Leica M -> m4/3 Adapter

    This new adapter seems to be well-executed. Hopefully there will be additional confirmations of precise infinity focus.

    I sent my Novoflex back, and told them I wanted to exchange it for one of their other adapters.

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    Administrator, Instructor Guy Mancuso's Avatar
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    Re: The China-made Leica M -> m4/3 Adapter

    Ordering info please
    Photography is all about experimentation and without it you will never learn art.

    www.guymancusophotography.com

  13. #13
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    Re: The China-made Leica M -> m4/3 Adapter

    http://doiop.com/g1adapters, look for 'jinfinance (ebay)'

  14. #14
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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by wslam View Post
    =))

    Ok, I have done some more testing.
    The adapter is very reasonably machined.
    I only have 2 comments.
    1) The 'button' that you push down to release the lens 'wobbles' when no lens is attached. It is actually ok solid, but because it moves, it just seems a bit fragile.
    To expand a bit for anyone who might be put off by this: The button doesn't wobble in the sense of being loose. What happens is that the latch (the part that engages the slot in the M mount to lock the lens in place) is a cylindrical pin. The button you push is attached rigidly to this pin at a right angle, and sticks out the side of the adapter through a slot. There's a slight amount of clearance in this slot to allow the button to move when you press it. Because the pin is cylindrical, it can rotate in its hole if you push the button sidewise, and naturally the button rotates along with it. This causes the button to appear to rock from side to side. It's not sloppy, though; it simply is rotating smoothly around the latching pin.

    I don't have the RayQual adapter for comparison, but it appears from the pictures that they've used a square latch pin instead of a round one, which would eliminate this rocking motion. But there's nothing wrong mechanically with the round pin.

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    Re: The China-made Leica M -> m4/3 Adapter

    It (the pin and the lens release button) is the same design as the Leitz's own OUFRO adapter. No worries.

  16. #16
    wslam
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    Re: The China-made Leica M -> m4/3 Adapter

    Thanks Ranger 9 for clarifying. yes, Wobbling is probably not the right word to describe it.
    So far, functionally, I cannot find any thing wrong with it, and the price is about half that of the others.

    I also ordered the Rayqual and it's supposed to arrive this week...

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    Re: The China-made Leica M -> m4/3 Adapter

    Is everyone getting infinity focus with the jinfinance adapter? I think mine may be just short of reaching it.

    Thanks

  18. #18
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    Re: The China-made Leica M -> m4/3 Adapter

    hmm....going past is one thing (Novoflex) but not reaching infinity is another. Have you tested with a long(ish) lens?

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    Re: The China-made Leica M -> m4/3 Adapter

    I have to do more testing - but I did check it with a 90 Summicron. A shot of the moon wide open was very soft but as I stopped down it seemed to get pretty sharp.

  20. #20
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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by GDI View Post
    Is everyone getting infinity focus with the jinfinance adapter? I think mine may be just short of reaching it.
    Finally bought a G1 today (yes, I bought the adapter first and then the camera!) so just now had a chance to test infinity focus with my jinfinance adapter.

    My adapter was too thick and would not reach infinity.

    Rather than sending it back and waiting to see if jinfinance can sort this out with his OEM, I did the following:


    -- Remove the M lens flange by removing the four Phillips-head screws. Don't worry, there are no loose parts to fly out.

    -- Place the flange lens-side-down on a sheet of wet #600 abrasive paper on a flat surface.

    -- Rub the flange against the paper in a circular pattern, changing grip frequently. (Warning to renters and married people: This is a messy operation.)

    -- Rinse and dry the flange, then re-assemble to test infinity.

    --Lather, rinse, and repeat.

    Before doing this, I had measured the total thickness of the adapter with a digital caliper, getting a nominal thickness of 8.67mm. By the time I had thinned the flange enough to get good infinity focus, the total thickness was 8.57mm. In other words, I had to remove 0.1mm from the face of the adapter. Your millimeterage may vary.

    More words to the wise based on my experience:


    -- The screws that hold the flange to the adapter body are of somewhat indifferent quality. It's easy to damage the screw head when trying to tighten it securely, even if you're using the correct-size screwdriver and exercising normal care (ask me how I know this.) If you really mung up the screw head you'll be in deep tapioca, because you won't be able to remove the screw again! (Fortunately, I avoided this fate.) Suggestion: instead of relying on firm tightening to hold the screws in place, use some sealer on the threads and tighten just enough to be secure. Apparently that's what the factory does too, as I found evidence of whitish sealer on the threads.

    -- Because the screws are small and there are only four of them, you might want to keep one hand under the lens at all times if you are using your new $10,000 f/0.95 Noctilux on your G1 via this adapter. (Or, if you really are using your new f/0.95 Noctilux, have one of your entourage or a servant lie on the ground under the camera to absorb the impact if the lens falls off.)

    -- When thinning down the flange as described above, you shouldn't have to worry about the lens still fitting tightly against it; the "leaf springs" that are cut into the flange's bayonet lugs are supposed to pull the lens firmly against the face of the flange However, I noticed that the top "spring" seems to fatigue easily, and most of my lenses developed a bit of play at the top after even slight use. I tried spreading the "leaf" with the tip of a screwdriver, which helped a bit, but it seems likely that it will fatigue again soon. Supporting the weight of the lens with your free hand should help work around this problem.

    This experience hasn't left me totally disappointed in the jinfinance adapter -- it does seem to work well as long as I keep a hand under the lens barrel, and I intend to keep using it until I can afford a house call from Doctor RayQual. But it does seem to suggest that you get what you pay for with these adapters.

  21. #21
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    Re: The China-made Leica M -> m4/3 Adapter

    Leica lenses deserve Rayqual. The best go together.

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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by monza View Post
    Leica lenses deserve Rayqual. The best go together.
    They are hard to get right now, unfortunately.

  23. #23
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    Re: The China-made Leica M -> m4/3 Adapter

    JapanExposures.com...that's where I'm getting mine.

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    Re: The China-made Leica M -> m4/3 Adapter

    Mine doesn't work at all yet! I ordered it 3 weeks ago and it's still not here! I keep checking the mail box expectantly every day.....

  25. #25
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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by jklotz View Post
    Mine doesn't work at all yet! I ordered it 3 weeks ago and it's still not here! I keep checking the mail box expectantly every day.....
    No, yours works fine... your postman told me he's getting great results with it... :-)

  26. #26
    wslam
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    Re: The China-made Leica M -> m4/3 Adapter

    I have also received the Rayqual. Yes, a little nicer quality, but to think the China-made one isn't good enough for your precious leica m lenses, is nothing but a matter of 'attitude misalignment' =)

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    Re: The China-made Leica M -> m4/3 Adapter

    Just picked mine up this morning, woohoo. Been playing with a Jupiter 8 and CV 40 1.4. So far so good. BTW, how do you check infinity focus?

  28. #28
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    Re: The China-made Leica M -> m4/3 Adapter

    Put a telephoto lens (preferably) on infinity using the focus scale and see if far away objects are in focus, or if you have to turn the lens to get them sharp.

  29. #29
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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by wslam View Post
    I have also received the Rayqual. Yes, a little nicer quality, but to think the China-made one isn't good enough for your precious leica m lenses, is nothing but a matter of 'attitude misalignment' =)
    Heh. I just see people spend thousands on Leica lenses only to try to save a few dollars on what appears to be a less than adequate adapter. Not to say that they won't get it right eventually (Novoflex is in the same category with regards to focus inaccuracy) but I just find it curious.

    This would be of concern to me...

    'I noticed that the top "spring" seems to fatigue easily, and most of my lenses developed a bit of play at the top after even slight use. I tried spreading the "leaf" with the tip of a screwdriver, which helped a bit, but it seems likely that it will fatigue again soon. Supporting the weight of the lens with your free hand should help work around this problem.'

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    good news and bad

    well, I've got good news and bad. Good news is my adaptor arrived from China today, 3 weeks to the day. Bad news is doesn't reach infinity focus. These are 100% crops, 1st is with adaptor and 75 summarit, 2nd is pani tele zoom. I tried several lenses, same result.

    What now? I'll contact the shipper, we'll see.....

  31. #31
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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by monza View Post
    'I noticed that the top "spring" seems to fatigue easily, and most of my lenses developed a bit of play at the top after even slight use. I tried spreading the "leaf" with the tip of a screwdriver, which helped a bit, but it seems likely that it will fatigue again soon. Supporting the weight of the lens with your free hand should help work around this problem.'
    That's my quote, and it concerns me a bit too. What concerns me even more is that the front flange is held into the body of the adapter by only four rather small screws. (I notice from the pictures that RayQual uses five screws.)

    Now maybe it will be fine; in fact I'm assuming it will be fine, since as I write this I've got a hefty 85/1.5 Canon lens hanging off the thing. But while some Leica M-mount optics are nice and petite, there are others that are quite hefty, and you'd be asking a lot of those four little screws to support them, such as if you mounted the camera on a tripod via the camera socket. (Fortunately, some of the beefier L-mount lenses such as the original 90/2 Summicron and the 105/2.5 Nikkor have tripod sockets on the lens.)

    I'm not saying the adapter is crap; as noted, I'm using it. But I think Monza is right to be warning people to be a bit careful. For that matter, Stephen Gandy has warned people on his website that the Micro Four Thirds body mount may not be up to the demands of some lenses people might want to hang off the front of it, adapter or no adapter.

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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by monza View Post
    Heh. I just see people spend thousands on Leica lenses only to try to save a few dollars on what appears to be a less than adequate adapter. Not to say that they won't get it right eventually (Novoflex is in the same category with regards to focus inaccuracy) but I just find it curious.
    I don't think it is curious, due to the lack of availability of the better adapters. Saving the money was going to be a bonus. But, of course, all it means now is a hassle! I am still on the waiting list for a rayqual, so eventually....

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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by Ranger 9 View Post

    I'm not saying the adapter is crap; as noted, I'm using it.
    Well, infinity focus happens to be my personal litmus test for crap!

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    Re: The China-made Leica M -> m4/3 Adapter

    I might mention that the Cameraquest (we assume Rayqual) adaptors are shipping. My FD adaptor shipped yesterday so I'm sure the M mounts are also. The first shipment of Ms were sold out and the second shipment is 3/1. Its cheaper than buying from the source I saw for the Rayquals (not a lot though LOL).

    Diane

  35. #35
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    Re: The China-made Leica M -> m4/3 Adapter

    Rayqual are shipping from Japan Exposures, Dirk told me he's got more going out next week, if you don't want to wait til March.

  36. #36
    ajuett
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    Re: The China-made Leica M -> m4/3 Adapter

    I ordered a Rayqual FD to m4/3 under a week ago. It took 3 days to get to Vancouver and cleared customs Friday but, didn't make the regular mail route. It should arrive tomorrow (Monday). There is a FD 50mm f/1.2 N waiting on my desk for it

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    Re: The China-made Leica M -> m4/3 Adapter

    When testing for infinity, how far should I checking? Meaning, I took a picture of a stop sign 100ft+ away, is that good enough? I'm using a 90mm lens.

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    Administrator Bob's Avatar
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    Re: The China-made Leica M -> m4/3 Adapter

    Infinity is a bit further than that.
    Assuming an f/2 90mm lens on a 4/3 sensor focused on an object 100 feet away, the calculated DOF for a circle of confusion of 0.015mm is from 89' 10" to 112' 9"
    Since the hyperfocal distance for that stop is 885', I think that a focus target of at least 1000 ft would be much more accurate.
    I use the moon, which is a little farther off.
    -bob
    Last edited by Bob; 9th February 2009 at 08:44.

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    Re: The China-made Leica M -> m4/3 Adapter

    I will see if the moon is available tonight. Thanks.

  40. #40
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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by Airtimid View Post
    When testing for infinity, how far should I checking? Meaning, I took a picture of a stop sign 100ft+ away, is that good enough? I'm using a 90mm lens.
    A factoid of unknown origin found in the musty corners of my brain says that a good formula value for "photographic infinity" is 10,000 x the focal length.

    In your case that would be 900 meters, or just a bit short of 1 km... a bit over half a mile... or about 7 city blocks.

    I like to use TV/radio towers handy for this purpose, as there are several at about the right distance where I live, and they've got lots of fine details for checking. Of course the moon is more photogenic...

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    Re: good news and bad

    Quote Originally Posted by jklotz View Post
    (...) Bad news is doesn't reach infinity focus. (...)
    What now? I'll contact the shipper, we'll see.....
    Hi James, it would be very interesting to know what Jinfinance (Rong Jin) answered you ... ?

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    Re: good news and bad

    Quote Originally Posted by bondo View Post
    Hi James, it would be very interesting to know what Jinfinance (Rong Jin) answered you ... ?
    He emailed me back. He said

    "there has been some similar reports about this... so we've already looked into this... seems most likely it's a simple mis-calculation."

    He is going to send me another one from the 2nd batch, with the problem corrected. He did not want me to return the original. Seems like a stand up guy to me, we'll see.

    In the mean time, I may try the sanding trick mentioned earlier in this thread, knowing that if my mechanically dis-inclined hands muck it up, there's another one on the way....

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    Re: good news and bad

    Quote Originally Posted by jklotz View Post
    He emailed me back. He said

    "there has been some similar reports about this... so we've already looked into this... seems most likely it's a simple mis-calculation."

    He is going to send me another one from the 2nd batch, with the problem corrected. He did not want me to return the original. Seems like a stand up guy to me, we'll see.

    In the mean time, I may try the sanding trick mentioned earlier in this thread, knowing that if my mechanically dis-inclined hands muck it up, there's another one on the way....

    My Cameraquest adapter arrived and I have received a refund from jinfinance, so all is well - he is a good seller.

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    Re: The China-made Leica M -> m4/3 Adapter

    Thanks a lot, James !

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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by Ranger 9 View Post
    My adapter was too thick and would not reach infinity.

    Rather than sending it back and waiting to see if jinfinance can sort this out with his OEM, I did the following:...
    Great instructions! Sadly, when I took the metal flange off a Praktica bayonet mount -> m/43 adapter, I discovered the flange is held by both a lip and an inner floor.



    Don't know how to sand that.

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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by Charles2 View Post
    Don't know how to sand that.
    You don't. You sand the piece you took off. You can either sand it off the bottom so the top surface sinks a bit more into the groove you uncovered, or you sand the top surface where the lens mounts - whichever's flattest. I'm not sure of on that adapter the mount piece rests on the outer lip of the adapter well or not. If it does, you'll need to grind the top surface because the bottom won't do anything.

    Do it very slowly and on a very flat surface with a fine-grain sanding paper sheet, and measure often to see when you've achieved your infinity goal. For the adapters I've had to sand down it wasn't much. Proceed at your own risk.
    -Dragos
    Panasonic GH1/G1, Canon FTb(n)/F-1, Mamiya C330F/RB67 Pro SD, Chamonix 45N-2, Nikon F5 + Assorted Lenses

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    Re: The China-made Leica M -> m4/3 Adapter

    Quote Originally Posted by photoSmart42 View Post
    You don't. You sand the piece you took off. ...
    Thank you for your patience. Maybe some day I will learn to read. The original instructions, I now see, clearly said sand the flange. Guess that's why I never became President of the U.S. "Let's see, to abort the nuclear launch, press the black button ... or was it the red button?"

    I'm off to buy abrasive paper.

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    Sanding works!

    Quote Originally Posted by Ranger 9 View Post

    My adapter was too thick and would not reach infinity.

    Rather than sending it back and waiting to see if jinfinance can sort this out with his OEM, I did the following:
    Followed Ranger 9's instructions for sanding an adapter that is too thick and therefore unable to focus to infinity. They work.

    This link goes to a sample of the best focus possible on some brickwork and roof shingles before sanding:

    http://www.flickr.com/photos/[email protected]/4883074902/

    And after:

    http://www.flickr.com/photos/[email protected]/4883074904/

    The improvement is clear in these 100% crops (and more dramatic in the entire image). The comparison is not exact: my distance was perhaps 10% different, and the light was different (sunlit before, overcast after). Still, I believe the point is made. Both images were shot at f/8.

    The lens is a Carl Zeiss Jena 28mm f/2.8. I do not know what its best performance should be.

    The instructions stress the need to sand a bit, test, and repeat as needed. Things are at the point where I don't see further improvement after a round of sanding, but the focus ring does not yet go past infinity.

    Of course, I spent a couple of hours on one adapter and might not be finished. The Chinese manufacturer cannot or will not machine the part correctly in the first place. Looking around the Web, all merchants who sell adapters for Praktica bayonet mount to m4/3 seem to have the same product.

    Anyone who might ever use an adapter should copy and save Ranger 9's instructions.

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