They seem like good objectives, and defenitely good value for money. The lower powers will do ok with probably most oculars; the high power will likely need a...
Howdy, Thanks for the explanation and instruction. These are the ones that I bought. http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2550926861 I guess I...
The green filter will improve the resolution of the image on film. I need to get a bigger monitor so I can see what the spell checker is putting in. Gordon ......
Looking for information/identification on microscope/ I just purchased a B&L microscope, serial KD 4739, I have learned was likely manufactured in 1951, but...
Goat, Had a look at the pics on ebay, you have done very well! The x63 APOplan is a wonderful piece of glass, and is a high dry, hence the NA 0.95, the maximum...
Hello, I am new to this group and I am seeking some information on a Leitz Orthoplan 2 I recently bought at auction. From what I've been told it has come from...
Ok, anyone know approximately when the Invertascope D was discontinued? This ID03 has modern large black lettering on the stand. Any comments about the "D"...
I have a Leitz objective that has the following identification: 170/- L 10/0.22 P UT 16/0.38 It also has a built in iris. The objective is new. I believe the...
i have the oppuertunity to buy a used lecia BMe for about 255-275 plus shipiing the owner says everything works and is in good condition is this a good price ?...
Howdy Merv, You are right, they are are Met. (at least the 20 and the 63). I was wondering why they didn't have a cover glass thickness on them. The .95 na was...
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Don H
morningstar@...
Sep 2, 2003 1:15 am
... Very well then, I have a question: is this the same as "dispersion staining?" I learned dispersion staining techniques in class, but can find very little...
The UT designation indicates it was designed to be used with a "universal" stage. This is a stage that rotates in either 3 or 4 axis and is primarily used for...
Hi ya'll :-) I've been experimenting with cross-polarizing crystals under the microscope and need some advice. I cannot get the background to go black. The...
I think that a better result can be obtained by placin a polaroid filter (analyzer)just after the objective lenses and another (polarizer) just below the...
Yes, Salvatore is right. Very often with older bino's, the prisms cause depolarisation, although that is also dependant on the direction of polarization....
... background ... watt ... achromatic ... project ... fits ... use ... standard ... would ... ...
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morningstar@...
Sep 2, 2003 11:58 am
That answer doesn't help. It sounds to me like the same techniques and the exact same optics, just a different name. If anyone has a *useful* answer I would...
9241
morningstar@...
Sep 2, 2003 12:09 pm
... Hi, If I'm not mistaken, camera polarizers *are* circular polarizers. If they weren't, you could rotate them to full extinction. However, if you notice,...
Hi Jonathan, Take a look at www.irem.it This firm made (and still makes) the powersupplies for the Osram HBO-lamps. Kind regards, Fred Hess / Phenix...
Hi Don, Full extinction you will get with fully polarized light (like from another filter). On a camera it is ment to extinguish annoying reflections, which...
Thank you all for your responses! :-) I should have been more clear- minded when I posted my request for help last night! The polarizing filters I am using are...
Sorry, didn't want to joke-you-down. Please go to one of the excellent microscopy websites that are always mentioned on this list and look for the explanation...
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morningstar@...
Sep 2, 2003 2:40 pm
Indeed, but camera polarizers are sold as "circular polarizers." It is quite possible that the two pieces of glass are only partially linearly polarized so ...
9247
morningstar@...
Sep 2, 2003 2:55 pm
Aha! Then it is not the same. I think DIC is much closer. Dispersion staining is another useful tool in optical mineralogy, along with Becke line tests, the...
Hi ya' Don :-) Polarizing filters used on cameras are composed of a single sheet of polarizing material mounted in a rotatable mount. These filters are not...
9249
morningstar@...
Sep 2, 2003 3:05 pm
Aha! That answers that question. I was quite convinced that there were two plates of glass in my Tiffen filter, so I will take a look when I get home from...
David, I think you're probably right, it's the quality of the polarizer. I know with my setup I used a camera linear polarizer for the polarizing filter, and...
