100X objective tests

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Olympusman
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100X objective tests

Post by Olympusman »

Testing 100X objectives on a metallurgical scope.

First a baseline 40X stack

Image

100X dry objective

Image

And the big surprise - 100X oil objective

Image
Michael Reese Much FRMS EMS Bethlehem, Pennsylvania, USA

rjlittlefield
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Post by rjlittlefield »

Is the oil objective used dry here?

--Rik

Lou Jost
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Post by Lou Jost »

Can you be more specific about which objectives/tube lenses you are testing? Thanks.

Olympusman
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Objective test

Post by Olympusman »

I should have put the specs of the objectives in the original post, which I will do from now on. The objectives are:

NIKON MPlan 40 0.65 210/0

The dry 100x objective may have come with an Amscope kit.

100/1.25
160/0.17

The 100X oil is a SWIFT objective that I have previously tested against my other oil objectives in transmitted light microscopy. This was the first time I tried it on a metallurgical scope with immersion oil and am very impressed by its performance.

SWIFT S-MICRO
100 1.25 Oil
160/0.17
Michael Reese Much FRMS EMS Bethlehem, Pennsylvania, USA

Pau
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Post by Pau »

The dry 100x objective may have come with an Amscope kit.
100/1.25
160/0.17
NA 1.25 is an oil immersion objective for sure. The maximum NA attainable in air is 0.95 (and with water immersion 1.2, I think).
Not surprising the bad results without oil
Pau

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