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Thread: 6-Bit coding old lenses via screw mount.

  1. #1
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    6-Bit coding old lenses via screw mount.

    Hi,

    Has anyone bought one of those metal adapter rings from eBay?
    I know millitch (typo) adapters were popular for a while, but I was curious if anyone has bought one of these: Roxsen Detachable 6 Bit Code Leica M Mount Lens Adapter 28 90 90mm 6 Hole M8 M9 | eBay

    Thinking of 6-bit coding an older Leica lens that I haven't used in years but have decided I wanna play with.

    Note: I know there are specific ones 28-90 etc etc.. Just curious about quality of this product, vs others out there.


    Best,
    Adam

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    Re: 6-Bit coding old lenses via screw mount.

    I have/use the ones from Rong Jin (ebay: "jinfinances"). Well made and works as it should, even with a Jupiter-3 5cm f/1.5 lens (coded as a Summilux 50).

    It is worth while doing this as there is a noticeable jump in contrast with the coded adapter.

  3. #3
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    Re: 6-Bit coding old lenses via screw mount.

    Thanks for the reply. I will check this guy out.

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    Re: 6-Bit coding old lenses via screw mount.

    I have a set for my 35mm Summicron, 50mm Summicron and 90mm Elmarit M and they work very well, no problems at all. Fitting them is easy but you do need to pay attention to centering the adapter on the lens, to do this you gradually tighten the screws opposite to opposite. If you find your lens has developed notchy focusing it is the centering that is off (this can also be the cause of notchy focusing on any Leica lens, so an easy fix). Use a matt black paint to code the lens, not a Sharpie.

    Steve

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    Re: 6-Bit coding old lenses via screw mount.

    I have one coming from RJ (the e bay contact mentioned by Vivek).
    He is an excellent seller, and produces a great selection of products.
    Looking forward to fitting it and seeing if there is a difference in the results.
    Gary

  6. #6
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    Re: 6-Bit coding old lenses via screw mount.

    Thanks for the tips, especially on the screw tightening. I think one or two of my lenses could do with an adjusting now that you mention it.

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