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09-13-2018, 07:36 PM   #1
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What mount is this?

Can anyone tell what mount this is? There's no screw threads on the outside, I only see them on the inside. This is a Soligor 180mm f3.5 preset lens.

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09-13-2018, 08:21 PM - 1 Like   #2
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Looks like the inner ring of a T-mount adapter. T-mount adapters consist of an inner ring that screws onto the lens, and an outer ring with flanges for whatever mount it is. The inner ring should screw off the lens, leaving 42mm threads - but they are a different pitch from M42 screw mount. T-to-K mount adapters are widely available.
09-13-2018, 09:40 PM   #3
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Oh, you're right! That inner ring was really stuck on there. I had to use a jar opener/ grip to turn it.

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