www.photomacrography.net :: View topic - Nikon CFW 10x eyepiece
www.photomacrography.net Forum Index
An online community dedicated to the practices of photomacrography, close-up and macro photography, and photomicrography.
Photomacrography Front Page Amateurmicrography Front Page
Old Forums/Galleries
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 
Nikon CFW 10x eyepiece

 
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Beginners Micro
View previous topic :: View next topic  
Author Message
dragonblade



Joined: 18 Oct 2014
Posts: 154

PostPosted: Fri Jan 26, 2018 11:01 pm    Post subject: Nikon CFW 10x eyepiece Reply with quote

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.
Back to top
View user's profile Send private message
Ichthyophthirius



Joined: 07 Mar 2013
Posts: 811

PostPosted: Sat Jan 27, 2018 5:14 am    Post subject: Reply with quote

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.
Back to top
View user's profile Send private message
dragonblade



Joined: 18 Oct 2014
Posts: 154

PostPosted: Sat Jan 27, 2018 5:39 am    Post subject: Reply with quote

Thankyou for those instructions. As previously mentioned, there are two rings on the eyepiece. Which would be the focusing ring - the one closest to the eye or the one further away?
Back to top
View user's profile Send private message
Ichthyophthirius



Joined: 07 Mar 2013
Posts: 811

PostPosted: Sat Jan 27, 2018 6:14 am    Post subject: Reply with quote

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/M7cAAOSwEzxYZbtg/s-l1600.jpg
Back to top
View user's profile Send private message
dragonblade



Joined: 18 Oct 2014
Posts: 154

PostPosted: Sat Jan 27, 2018 2:32 pm    Post subject: Reply with quote

Ichthyophthirius wrote:
Hi,

Not sure what you mean.


Well since it's a focusing eyepiece, I assume it would have a focus ring, just like a photographic / camera lens. I can't visualise any other way to focus the eyepiece other than rotating a ring.
Back to top
View user's profile Send private message
Ichthyophthirius



Joined: 07 Mar 2013
Posts: 811

PostPosted: Sat Jan 27, 2018 2:40 pm    Post subject: Reply with quote

Ah, I see. I was wondering why you had two focussing rings. I assume what you mean is: which of the two curdled rings is the focussing ring?

The one on top. It moves the entire upper part of the eyepiece as you can see in my first link.
Back to top
View user's profile Send private message
dragonblade



Joined: 18 Oct 2014
Posts: 154

PostPosted: Sat Jan 27, 2018 2:51 pm    Post subject: Reply with quote

Thanks again for clarifying. When I find the "0" position, I'll duct tape it in place.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    www.photomacrography.net Forum Index -> Beginners Micro All times are GMT - 7 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group