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08-05-2019, 04:47 PM   #1
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k mount lense to screwbase spotmatic adaptor

I see adaptors for old screw mount lenses to mount on k mount cameras. I haven't seen the reverse. Are they out there? I would like to use my old spotmatic with some of my newer lenses. I'm assuming the AF or manual issue would not be a problem as long as I shoot manual

08-05-2019, 04:53 PM - 1 Like   #2
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Hello,

No, That is not possible due to physical dimensions and registration (distance from the lens to the film plane). K mount s bigger than M42. That's why you can adapt M42 screwmount to K mount while keeping registration.

Thanks,
08-05-2019, 05:15 PM   #3
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You night be able to rig up a Bellow or make an extension tube for macro work but that's about it I think...even then you'll have to make something yourself.

08-05-2019, 05:18 PM   #4
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Thanks, guess I will keep my eye out for some bargain nice lenses

08-05-2019, 05:44 PM   #5
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QuoteOriginally posted by jdn Quote
Thanks, guess I will keep my eye out for some bargain nice lenses
Look for one of the 55mm Super Takumars...or a SMC Takumar...The F1.8 and F2 are optically the same, the F2 is mechanically restricted to F2.
08-06-2019, 12:57 AM   #6
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QuoteOriginally posted by jdn Quote
I see adaptors for old screw mount lenses to mount on k mount cameras. I haven't seen the reverse. Are they out there? I would like to use my old spotmatic with some of my newer lenses. I'm assuming the AF or manual issue would not be a problem as long as I shoot manual
I have not seen any IQ differens between m 42 and equivalent k bayonet lenses
08-06-2019, 06:04 AM   #7
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QuoteOriginally posted by jdn Quote
Thanks, guess I will keep my eye out for some bargain nice lenses
The wonderful (and often cheap) Takumars are one of the great reasons to use a Spotmatic. Embrace the M42
08-06-2019, 06:43 AM   #8
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QuoteOriginally posted by tonyzoc Quote
You night be able to rig up a Bellow or make an extension tube for macro work but that's about it I think...even then you'll have to make something yourself.
There is a company PrecisionParts that makes custom telescope adapters to order. A K-mount to M42 screwmount adapter needs to have a minimum of 15.5mm of extension (to accommodate the K bayonet) and run a minimum of $199.00 USD.

So basically you'll have an expensive extension tube with no aperture lever and your K-mount lenses will only be good for close-up and macro work.

You can buy some nice screwmount lenses with $199 USD.

08-07-2019, 05:55 PM   #9
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Not so cheap anymore... since the Canon/Sony crew figured out how great this glass is and how easy it was to adapt to their cameras

QuoteOriginally posted by nickthetasmaniac Quote
The wonderful (and often cheap) Takumars are one of the great reasons to use a Spotmatic. Embrace the M42
08-07-2019, 09:03 PM - 1 Like   #10
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QuoteOriginally posted by titrisol Quote
Not so cheap anymore... since the Canon/Sony crew figured out how great this glass is and how easy it was to adapt to their cameras
I know what you mean, but just going off the front page classifieds on PF today, you could build a three lens Super Takumar kit (35, 55, 200) for ~$150... In the grand scheme of things, that's still pretty 'cheap'.
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