Olympus Plan Apo 40x 0.95NA 0.11-0.23 coverslip - correction collar screw?

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mneium
Posts: 38
Joined: Fri Mar 13, 2020 7:15 pm

Olympus Plan Apo 40x 0.95NA 0.11-0.23 coverslip - correction collar screw?

#1 Post by mneium » Wed Mar 25, 2020 6:27 pm

https://i.imgur.com/f7Tb5qG.jpg

Heyo. I recently bought one of these objectives and was reading about the correction collar. Mine doesn't turn. I noticed this screw that isn't present on the other objectives (left: Splan Apo 40X Dry, right: Splan Apo 100X Oil) and it has a correction collar nit pointing to it. Am I right in thinking you have to rotate this screw to allow the collar to turn? Couldn't find anything about this online and I don't want to ruin an ancient piece of optics by screwing around (pun intended.)

MichaelG.
Posts: 2208
Joined: Mon Apr 10, 2017 8:24 am
Location: NorthWest England

Re: Olympus Plan Apo 40x 0.95NA 0.11-0.23 coverslip - correction collar screw?

#2 Post by MichaelG. » Wed Mar 25, 2020 8:04 pm

The little screw probably just fixes the chrome sleeve onto the [seized with old grease] helicoid adjuster.

MichaelG.
.

Have a look at the sectional view on this [Nikon] page:
https://www.microscopyu.com/microscopy- ... correction
Too many 'projects'

mneium
Posts: 38
Joined: Fri Mar 13, 2020 7:15 pm

Re: Olympus Plan Apo 40x 0.95NA 0.11-0.23 coverslip - correction collar screw?

#3 Post by mneium » Wed Mar 25, 2020 9:01 pm

MichaelG. wrote:
Wed Mar 25, 2020 8:04 pm
The little screw probably just fixes the chrome sleeve onto the [seized with old grease] helicoid adjuster.

MichaelG.
.

Have a look at the sectional view on this [Nikon] page:
https://www.microscopyu.com/microscopy- ... correction
I see, it's unrelated and the mechanism is just seized. I'll have to take it up with eBay. Thanks!

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