Search found 4 matches

by dawsonmic
Tue Nov 26, 2019 6:57 am
Forum: Microscopes and optics
Topic: Ortholux tube lens
Replies: 5
Views: 1598

Re: Ortholux tube lens

Hello, There are a number of 'vintages' of the Ortholux I, and one of the things that differed the most during its almost 40 years of production (~1937 to 1976) was the design of the viewing tube. More recent instruments tended to have either the FS or FSA trinocular tubes, both designed for optimal...
by dawsonmic
Tue Nov 26, 2019 5:09 am
Forum: My microscope
Topic: Manufacturer of this petrographic scope?
Replies: 8
Views: 4508

Re: Manufacturer of this petrographic scope?

Interesting that Kyowa used to manufacture the Unitron microscopes - never knew that! In the meantime, I did look up the literature and the Unitron model was 'MPS'. And I was incorrect about it being absolutely identical - I note three differences comparing it to the literature. The biggest differen...
by dawsonmic
Tue Nov 26, 2019 4:52 am
Forum: My microscope
Topic: Manufacturer of this petrographic scope?
Replies: 8
Views: 4508

Re: Manufacturer of this petrographic scope?

Hi, I am almost certain that you have a Unitron petrographic. It is identical in every respect to the catalog illustrations I have from the late 1960's, but it is curious that it is lacking the Unitron logo on the tube. One oddity on this particular model instrument is the means of focusing the cond...
by dawsonmic
Tue Nov 26, 2019 4:07 am
Forum: My microscope
Topic: Newbie Needs Help Identifying Microscope.....please.
Replies: 11
Views: 5326

Re: Newbie Needs Help Identifying Microscope.....please.

Hi Bob, Joined the forum so I could respond to your inquiry although someone else did correctly identify your instrument (Leitz Miniload hardness tester). Your instrument has a more recent illuminator (and socket) than that used on the earlier instrument that was pictured. The older instrument uses ...