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What is this objective adapter?
Posted: Sat Aug 20, 2022 1:54 am
by Sure Squintsalot
I picked up an old Nikon M Plan 40 objective and it had this adapter on it:
- Screenshot 2022-08-19 194612.jpg (25.96 KiB) Viewed 1076 times
Anyone know what it is? The identical knurling to the objective makes me think it's a Nikon part. The outer diameter of the adapter threads is 26.0mm:
- Screenshot 2022-08-19 194554.jpg (48.19 KiB) Viewed 1076 times
Re: What is this objective adapter?
Posted: Sat Aug 20, 2022 3:33 am
by Greg Howald
Looks to me like an adaptor ring used to make a 20 mm objective fit a 25 mm nose piece. I'd like to find a source for such things at a reasonable price.
Re: What is this objective adapter?
Posted: Sat Aug 20, 2022 6:08 am
by PeteM
Greg Howald wrote: ↑Sat Aug 20, 2022 3:33 am
Looks to me like an adaptor ring used to make a 20 mm objective fit a 25 mm nose piece. I'd like to find a source for such things at a reasonable price.
Greg - eBay is one source:
https://www.ebay.com/sch/i.html?_from=R ... =2&_sop=15
Re: What is this objective adapter?
Posted: Sat Aug 20, 2022 11:35 am
by blekenbleu
I have accumulated a couple of them and suppose that they are from Nikon
specifically for using 210 M Plan objectives parfocally in BD Plan nosepieces.
- M26-RMS.jpg (32.07 KiB) Viewed 995 times
Re: What is this objective adapter?
Posted: Sat Aug 20, 2022 1:11 pm
by Greg Howald
Thanks Pete.
