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Samyang 135 not enough back focus

Phillyo
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Phillyo

Phillyo

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I'm curious. 

I'd like to maybe add a rotator into the mix to allow better framing and I have seen that RVO make a couple of them, either M42 or M48 fitting. Do you think I'll be able to fit this onto my camera, then onto the filter drawer then a small extender (2mm?) onto the samyang lens?

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Budgie1
Budgie1

Your sensor if further back into the camera than where you're taking the measurement from: See if this helps:

woldsman
woldsman

You should be able to achieve back focus as I have the same adapter and a filter wheel in the image train. Could you post a picture of your setup? Possibly you have not removed the 11mm extender if th

Budgie1
Budgie1

So, you need 44mm back focus between the adaptor and the camera sensor. If you replace the 11mm spacer on the front of the camera with the 16.5mm spacer then you should be at the required 44mm.

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