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11-13-2017, 03:13 PM   #1
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What's an "RT Flange" ?

Name:  rt flange.jpg
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(Link to expired ebay listing.)

Can anyone tell me what this piece is for? It looks like it could be a PK lens to M42 body adapter?

I couldn't find the answer by googling and the ebay listing has expired so I thought I'd ask here.

11-13-2017, 03:25 PM   #2
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"Reverse T" mount adapter, so 42mm but with a different thread pitch than m42. The application for this would be to mount a lens with a proprietary mount onto a T mount macro bellows (which Spiratone sold).

You can get to m42 by using this in conjunction with a T to m42 ring, but it would only be usable for macro photography.
11-13-2017, 03:33 PM   #3
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QuoteOriginally posted by dcshooter Quote
"Reverse T" mount adapter. . .

Ah, that makes sense. Thank you for the quick reply, dcshooter!
11-13-2017, 08:13 PM   #4
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I would love to have one. It would make my m42 bellows that much more useful.

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