Lens adapters
Jul 16, 2014 11:41:03 #
I'm trying to find a way to adapt DSLR camera bodies to a Questar which requires old Pentax SLR lens thread. Any ideas?
Jul 16, 2014 11:47:39 #
Jul 16, 2014 12:03:57 #
jhkpilot wrote:
I'm trying to find a way to adapt DSLR camera bodies to a Questar which requires old Pentax SLR lens thread. Any ideas?
I know Celestron and Meade sell adapters for other cameras, are you sure Questar doesn't?
Jul 16, 2014 13:48:08 #
Jul 17, 2014 00:05:20 #
jhkpilot wrote:
I'm trying to find a way to adapt DSLR camera bodies to a Questar which requires old Pentax SLR lens thread. Any ideas?
The old pentax thread is called the M42 thread mount. Search for "M42 to (your cameras mount) adapter"
Jul 17, 2014 02:16:39 #
jhkpilot wrote:
I'm trying to find a way to adapt DSLR camera bodies to a Questar which requires old Pentax SLR lens thread. Any ideas?
Are you SURE it's a Pentax thread and not a T-mount? If it's a T-mount, you can buy any adapter in any of hundreds or thousands of locations?
Jul 17, 2014 05:56:21 #
My Sony Alpha lens adapter to M-42 will require "manual" setting of the camera. Many of these old glass are excellent. Several years ago, perhaps before adapters became easy to find and cheap, M-42s were very low cost. Now the price has come up because the M-42 will, with adapter, fit any camera.
You can travel to China and go to markets, or you can order off of E-Bay. Surprising the low cost, free shipping, and rapid shipping.
Note: Some Sony Alpha adapters have electronics that will fool the camera, others require manual and ignoring the "no lens" screen protest.
It may be helpful if you camera bodies you are using.
You can travel to China and go to markets, or you can order off of E-Bay. Surprising the low cost, free shipping, and rapid shipping.
Note: Some Sony Alpha adapters have electronics that will fool the camera, others require manual and ignoring the "no lens" screen protest.
It may be helpful if you camera bodies you are using.
Jul 17, 2014 06:56:25 #
shagbat
Loc: London
Mogul wrote:
Are you SURE it's a Pentax thread and not a T-mount? If it's a T-mount, you can buy any adapter in any of hundreds or thousands of locations?
Good point Mogal, both dia. 42mm, they have different pitches. Incidently, NO screw thread associated with cameras should be designated 'M'. This indicates a metric standard coarse thread, which would never fit.
Jul 17, 2014 08:05:03 #
Thread pitch for T mount is .75 & for M42 is 1.0 although both are 42mm diameter.... They are not interchangeable...
Jul 17, 2014 08:20:39 #
shagbat
Loc: London
Screamin Scott wrote:
Thread pitch for T mount is .75 & for M42 is 1.0 although both are 42mm diameter.... They are not interchangeable...
The pitch for threads designated M42, is 4.5 mm.
Both pentax and T mount are called special fine threads,
in engineering circles.
Mind you, I appreciate it may be different across the pond.
Jul 17, 2014 08:27:12 #
I looked it up after you posted this & this is what Wiki has to say about M42 thread pitch... Maybe it is different "across the pond", but this originated on your side of the pond...
http://en.wikipedia.org/wiki/M42_lens_mount
http://en.wikipedia.org/wiki/M42_lens_mount
shagbat wrote:
The pitch for threads designated M42, is 4.5 mm.
Both pentax and T mount are called special fine threads,
in engineering circles.
Mind you, I appreciate it may be different across the pond.
Both pentax and T mount are called special fine threads,
in engineering circles.
Mind you, I appreciate it may be different across the pond.
Jul 17, 2014 08:36:13 #
shagbat
Loc: London
Screamin Scott wrote:
I looked it up after you posted this & this is what Wiki has to say about M42 thread pitch... Maybe it is different "across the pond", but this originated on your side of the pond...
http://en.wikipedia.org/wiki/M42_lens_mount
http://en.wikipedia.org/wiki/M42_lens_mount
Snap!
Jul 17, 2014 13:19:37 #
jhkpilot wrote:
I'm trying to find a way to adapt DSLR camera bodies to a Questar which requires old Pentax SLR lens thread. Any ideas?
Just get an M-42 lens adapter.
Jul 17, 2014 14:30:56 #
Screamin Scott wrote:
Thread pitch for T mount is .75 & for M42 is 1.0 although both are 42mm diameter.... They are not interchangeable...
Obviously not, but the OP would not be the first person to make an error in identification.
Jul 17, 2014 16:12:15 #
mechengvic wrote:
The old pentax thread is called the M42 thread mount. Search for "M42 to (your cameras mount) adapter"
There's also the Pentax P/PK mount with tabs.
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