Hi
Just wondering if I can link my Takumar lens to the Altair 183c to capture in Sharpcap
♦ Altair 183c > Takumar SMC 300mm F/4 [M42]
1. Can it be done? what adapter is required?
2. What about backfocus?
thanks
m42 > Altair 183c [cooled]
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Jean-Francois
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Re: m42 > Altair 183c [cooled]
Hello,
Yes you can connect any M42 objective to any camera with M42 interface.
What you need is to search the back-focus of the Takumar objective (if full format objective, it should be near 44 mm).
And then to have a look in the datasheet of your camera.
The rest is easy ... you do a subtraction.
After that you need to search one or several M42 adapter ring for the calculated distance.
You can use a little shorter ring and do the focus with the camera objective focus ring.
I can help you for the subtraction
Regards,
Jean-Francois
Yes you can connect any M42 objective to any camera with M42 interface.
What you need is to search the back-focus of the Takumar objective (if full format objective, it should be near 44 mm).
And then to have a look in the datasheet of your camera.
The rest is easy ... you do a subtraction.
After that you need to search one or several M42 adapter ring for the calculated distance.
You can use a little shorter ring and do the focus with the camera objective focus ring.
I can help you for the subtraction
Regards,
Jean-Francois
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admin
- Site Admin
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- Location: Vale of the White Horse, UK
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Re: m42 > Altair 183c [cooled]
Hi,
yes, if I was going to do this I would be looking for a T thread to M42 adaptor (make sure the threads are the right way round - male for the T thread to go into the camera and female at the lens side). Also some T thread spacers of various lengths so you can build up the correct spacing. One thing I managed to buy once was a set of plastic T thread 'washers' in 0.5mm, 1mm, etc, which can be used to fine-tune the length.
cheers,
Robin
yes, if I was going to do this I would be looking for a T thread to M42 adaptor (make sure the threads are the right way round - male for the T thread to go into the camera and female at the lens side). Also some T thread spacers of various lengths so you can build up the correct spacing. One thing I managed to buy once was a set of plastic T thread 'washers' in 0.5mm, 1mm, etc, which can be used to fine-tune the length.
cheers,
Robin