Nikon CFW 10x eyepiece
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- dragonblade
- Posts: 200
- Joined: Sat Oct 18, 2014 11:16 pm
Nikon CFW 10x eyepiece
Ive just received a Nikon CFW 10x eyepiece which is supposedly high eyepoint. It is also a focusing eyepiece. It was suggested that you can get away with not focusing it by setting the diopter to 0. However, I'm not sure which ring is for diopter adjustment (there are two manual rotating rings.) The ring that is closest to the eye is considerably thicker. Also, I don't see any numbers on either of the rings so not sure how I could set the diopter to 0.
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- Posts: 1152
- Joined: Thu Mar 07, 2013 5:24 am
Hi,
You can find the "0" in several ways.
- Use a non-focussing DIN eyepiece as a reference or:
- On a properly set-up microscope, find the eyepiece position in which all objectives are parfocal (from low to high magnification, e.g. 4-40).
To do this, use the objective 40 to focus (stage) on an object, then go back to the 4 and focus the eyepiece until the object is in focus again. Go back to the 40, focus using the stage again, go back to 4 and focus with eyepiece again. All objectives should now be parfocal and the eyepiece should be in 0 position.
You can find the "0" in several ways.
- Use a non-focussing DIN eyepiece as a reference or:
- On a properly set-up microscope, find the eyepiece position in which all objectives are parfocal (from low to high magnification, e.g. 4-40).
To do this, use the objective 40 to focus (stage) on an object, then go back to the 4 and focus the eyepiece until the object is in focus again. Go back to the 40, focus using the stage again, go back to 4 and focus with eyepiece again. All objectives should now be parfocal and the eyepiece should be in 0 position.
- dragonblade
- Posts: 200
- Joined: Sat Oct 18, 2014 11:16 pm
-
- Posts: 1152
- Joined: Thu Mar 07, 2013 5:24 am
Hi,
Not sure what you mean. The lower ring might possibly be part of the lower eyepiece tube. It might come off eventually.
The correct ring moves the top of the eyepiece containing the optics. It opens a gap below the "CFW 10x" lettering, as seen here:
http://www.prc68.com/I/Images/NikonCFW10xs.jpg
There is also a white line being exposed when you turn it. This could possibly mark the "0" position:
https://ssli.ebayimg.com/images/g/M7cAA ... -l1600.jpg
Not sure what you mean. The lower ring might possibly be part of the lower eyepiece tube. It might come off eventually.
The correct ring moves the top of the eyepiece containing the optics. It opens a gap below the "CFW 10x" lettering, as seen here:
http://www.prc68.com/I/Images/NikonCFW10xs.jpg
There is also a white line being exposed when you turn it. This could possibly mark the "0" position:
https://ssli.ebayimg.com/images/g/M7cAA ... -l1600.jpg
- dragonblade
- Posts: 200
- Joined: Sat Oct 18, 2014 11:16 pm
-
- Posts: 1152
- Joined: Thu Mar 07, 2013 5:24 am
- dragonblade
- Posts: 200
- Joined: Sat Oct 18, 2014 11:16 pm