Why no 3rd party Pentax 67-645 adapters?

[Dave Gurtcheff]

I have a 645D and a bunch of 645 lenses. I cannot find a Pentax 67-645 adapter. Said adapter would allow me more choices in the used lens market. With the popularity of the 645D and a run on 645 used glass, it would seem benificial (and profitable) for a 3rd party to make such an adapter, such as Photodiox. Is the 645 mount still under patent?

Thanks

Dave

[ErikKaffehr]

Hi!

Pentax is making one that is said to be available in Japan.

Best regards
Erik

I have a 645D and a bunch of 645 lenses. I cannot find a Pentax 67-645 adapter. Said adapter would allow me more choices in the used lens market. With the popularity of the 645D and a run on 645 used glass, it would seem benificial (and profitable) for a 3rd party to make such an adapter, such as Photodiox. Is the 645 mount still under patent?

Thanks

Dave

[Leping]

The Pentax adapter used to be widely available only a while ago - KEH used to have multiple copies in EX condition for $185.  So probably the 3rd party makers did not see the needs / market.

Of course now the situation is totally different, but from time to time it does show up on eBay and craiglists, sometimes offered with 67 lenses.

[Dave Gurtcheff]

Hi Lepig: I know adapters used to be inexpensive, and plentiful. Used 645 lens prices have gone out of site, but 67 lens prices are still reasonable.
Dave