Tim, The duel-adjustable eyepiece vs the single adjustable one, I believe has to do with the type of prism that is used.
Mis-matched eyepieces can be a problem, especially if from different manufacturers or even magnification. Magnification differences would be somewhat obvious as you will never get them to focus for two eyes. In order to use a binocular telescope (really cool instrument, once had the chance to use one of those) you need, not only matched eyepieces, but ideally from the same lot #. However, focusing two ten-inch telescopes to the same focal plane is a bit touchier than a microscope. Its one of the reasons you don't see too many of them. Have you tried simply swapping them (left to right/right to left)? -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Morken, Timothy Sent: Tuesday, July 10, 2012 1:49 PM To: Lee & Peggy Wenk; Histonet Subject: RE: [Histonet] microscope ocular questions Thanks Peggy, That is clear. I used microscopes for years with one fixed ocular and one focusable ocular. I was wondering about why now both oculars are "focusable" yet one has more usability than the other. Maybe to accomodate greater variation? Or maybe is due to the advent of parfocal microscopes I found some instructions on parfocal adjustment that refers to setting both oculars to zero when doing the initial focus at high magnification, then setting the ocular adjustment for each eye at low magnification. So that makes sense for individualistic adjustment. However, I was asked why one ocular has easier use and more graduations that the other and I didn't have a good answer to that...The person thought the oculars were not the same so there was some problem with the microscope. Tim -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Lee & Peggy Wenk Sent: Tuesday, July 10, 2012 11:27 AM To: Histonet Subject: RE: [Histonet] microscope ocular questions Tim, etal: This is easily understood: focusing and setup work the same on binoculars, one eyepiece is focused with the main focusing system, the other is used to match focusing with both eyes. First focus the scope (binoculars or microscope) thru the simple (non focusing) eyepiece, then use the focusing eyepiece to fine tune focus for the other eye. Once you've determined the setting on the focusing eyepiece, you can return the scope to this setting with ease and you should be able to use the scope for hours at a time without fatigue. Each microscope or binoculars is different. The setting for each person will be different (everybody's eyes are different). Each of our eyes are different, thus the need for independent focusing for one eye. Try defocusing the focusing eyepiece and using scope for a period. Your eyes will have to work overtime to keep the image in focus (if you are young you might last longer than I would at 65) and you could get a headache or suffer fatigue. Lee Wenk (Peggy's husband) -----Original Message----- From: Morken, Timothy Sent: Tuesday, July 10, 2012 1:39 PM To: Histonet Subject: [Histonet] microscope ocular questions Histonet gurus, Why is each microscope ocular marked and operated differently? For instance the right one has a knurled focusing ring, is easily focused and has detailed graduations while the left one is not really set up to focus quickly and has only minimal graduations? Always wondered about this but can't find anything about it! Thanks for your insights! Tim Morken Supervisor, Electron Microscopy/Neuromuscular Special Studies Department of Pathology UC San Francisco Medical Center 505 Parnassus Ave, Box 1656 Room S570 San Francisco, CA 94143 (415) 353-1266 (ph) (415) 514-3403 (fax) [email protected] _______________________________________________ Histonet mailing list [email protected] http://lists.utsouthwestern.edu/mailman/listinfo/histonet _______________________________________________ Histonet mailing list [email protected] http://lists.utsouthwestern.edu/mailman/listinfo/histonet _______________________________________________ Histonet mailing list [email protected] http://lists.utsouthwestern.edu/mailman/listinfo/histonet This electronic mail and any attached documents are intended solely for the named addressee(s) and contain confidential information. If you are not an addressee, or responsible for delivering this email to an addressee, you have received this email in error and are notified that reading, copying, or disclosing this email is prohibited. If you received this email in error, immediately reply to the sender and delete the message completely from your computer system. _______________________________________________ Histonet mailing list [email protected] http://lists.utsouthwestern.edu/mailman/listinfo/histonet
