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Mounting Reichert infinity corr objectives, 28mm thread?

 
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jmc



Joined: 17 Apr 2020
Posts: 53

PostPosted: Sat May 02, 2020 1:57 am    Post subject: Mounting Reichert infinity corr objectives, 28mm thread? Reply with quote

Need some advice please folks.

I recently bought some Reichert infinity corrected objectives off ebay with the idea of using them in front of a camera lens for photomacrography, and when they arrived I discovered that they weren't RMS thread, but a larger one - just under 28mm as measured with micrometer.

Before I spend more money on an adapter suitable for attaching these to the front of a lens, would I be right in thinking that the thread would be M28x0.75 (I see Raf camera does a range of suitable adapters with this thread)?

Sorry, one additional question. I was planning on using these in front of either a Canon EOS 100mm macro lens, or Rayfact 105mm f4.5 (Nikon fit) lens. Would these be suitable, or do I need something with a longer focal length?
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Adalbert



Joined: 30 Nov 2015
Posts: 1040

PostPosted: Sat May 02, 2020 3:08 am    Post subject: Reply with quote

Hi,
I use a cheap step-down ring 52mm->28mm for my Reichert Plan Fluor 100x / 0.95.
If you use 105mm you will get ½ of the magn (so, better 200mm).
BR, ADi
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jmc



Joined: 17 Apr 2020
Posts: 53

PostPosted: Sat May 02, 2020 3:33 am    Post subject: Reply with quote

Ah right, thanks Adalbert. Time to order an adapter then.

I do have a 200mm f4 micro-Nikkor I could use, which is also a 52mm filter thread.
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Adalbert



Joined: 30 Nov 2015
Posts: 1040

PostPosted: Sat May 02, 2020 4:17 am    Post subject: Reply with quote

Yes, 200mm f4 micro-Nikkor would be perfect :-)
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