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F*250-600mm on eBay
Posted By: G_Money, 05-18-2014, 08:35 AM

Pentax SMC Pentax F 1 5 6 Ed If 250 600mm Zoom Lens Filter PL Mount Case Kit Cap | eBay

<$5,000 seems very reasonable.
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08-21-2014, 11:38 AM   #16
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"IF" the wires are still inside the barrel it wouldn't be hard to solder them back on to another mount.

08-21-2014, 10:09 PM   #17
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Funny thing.
The arri mount has a registration distance of 52mm, K mount is 45.5mm.

I can't see where 6.5mm is missing from the back of it.
is it possible it's just an adaptor?
08-22-2014, 04:41 AM   #18
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QuoteOriginally posted by skunktail Quote
Funny thing.
The arri mount has a registration distance of 52mm, K mount is 45.5mm.

I can't see where 6.5mm is missing from the back of it.
is it possible it's just an adaptor?
Hmm, good point. I could see a few possibilities:

1) Adjustment of focus barrel position if there is enough extra play in the helical to bring it back to the proper position. Definitely a possibility that there is that much leeway in a lens this length.

2) Removal of internal shims to bring the internal optical elements further back in the lens. Whether this is possible depends on the internal design, which I am not familiar with.

3) Clever machining of multiple components of the rear mount to match original appearance while reducing length.

4) The lens doesn't focus to infinity, which would make a Super-tele a very odd choice.

Of these, only 3 would likely be irreparable. Looking closely at the pics on the listing, it appears that the Arri mount is secured by screws sunk into the sides of the barrel, so it looks like a custom job.
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