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marking meanings (Leitz PL FLUOTAR 40/0.70 *160/0.17)
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Pau
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Joined: 20 Jan 2010
Posts: 5030
Location: Valencia, Spain

PostPosted: Thu Feb 25, 2016 10:45 am    Post subject: Reply with quote

Generic safety caveats aside, I think that a halogen lamp powered at its rated voltage is in fact more dangerous because it emits UV while white LEDs don't. Their major danger will be high intensity in the blue peak. I have a good collection of ND filters to deal with.

I've used 10W LEDs (matrix of 6 points) at Kölher for fluorescence with good results, although I only can fit four of the points at the back focal plane.

Quote:
as long as your example isn't delaminated...

Yes, this is why I said fingers crossed
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Rorschach



Joined: 08 Mar 2019
Posts: 112
Location: Finland

PostPosted: Thu Apr 02, 2020 4:02 am    Post subject: Reply with quote

Yes. I am at it again...thread necromancy.

But I thought it might be of interest that I recently received a 'for parts' Orthoplan from Germany that is actually in much better condition than I expected. Condenser vertical movement is stuck, as are trinocular interpupillary adjustment and the left/right movement of the XY stage (forward/backward adjustment works fine). Everything else works, including field diaphragm, filter slide, coarse/fine focus and both lens flips.

The interest for this thread, however, is that it came with a Leitz Pl 80x/0.95 * infinity, no cover slip objective. So an asterisk lens different from those that have been discussed in this thread.

The scope is an Orthoplan but is intended for reflected light, no coverslip work. The nosepiece has the infinity symbol marked and 0.8x

Here's the data on all the lenses in the nosepiece (all of them infinity, no cover slip):

Pl 8x/0.18 C 107038
Pl 32x/0.50 C 107455
Pl 80x/0.95 * C 114779
Pl 160x/0.95 C 78704
C 484

The last one is a hardness testing apparatus which does actually have a lens too. There's a level which one can use to swivel 90 degrees between the lens and the diamond head.
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Ichthyophthirius



Joined: 07 Mar 2013
Posts: 993

PostPosted: Thu Apr 02, 2020 4:20 am    Post subject: Reply with quote

Hi,

Does it look like this https://spectraservices.com/product/leitz-pl-80x.html with the 1980s external design?

I suspect that has the same meaning, in this case suitability for epi-DIC https://www.microscopyu.com/techniques/dic/reflected-light-dic-microscopy, without having any proof of this.

Regards, Ichty
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Rorschach



Joined: 08 Mar 2019
Posts: 112
Location: Finland

PostPosted: Thu Apr 02, 2020 4:59 am    Post subject: Reply with quote

Ichthyophthirius wrote:
Hi,

Does it look like this https://spectraservices.com/product/leitz-pl-80x.html with the 1980s external design?

I suspect that has the same meaning, in this case suitability for epi-DIC https://www.microscopyu.com/techniques/dic/reflected-light-dic-microscopy, without having any proof of this.

Regards, Ichty


Wow, that is pricey! Although, Spectra prices are usually "asking prices". I would expect a much lower selling price, maybe 400-500 USD.

But mine looks a bit different, the asterisk is alone, below other markings. And it does not have that grooved "grip ring" in the middle: it is on the upmost part of the lens.


I'll attach pics later in the evening!
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Ichthyophthirius



Joined: 07 Mar 2013
Posts: 993

PostPosted: Thu Apr 02, 2020 7:06 am    Post subject: Reply with quote

Hi,

Yes, the price is nonsense. These would cost around $40-50 on Ebay if anyone would buy them. There is practically no market for them other than being dustcaps. However, I like linking to them because links to Spectra are stable for years as no-one will buy these Very Happy Very Happy

Please post a picture and maybe we can identify it.
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Rorschach



Joined: 08 Mar 2019
Posts: 112
Location: Finland

PostPosted: Thu Apr 02, 2020 10:16 am    Post subject: Reply with quote

Ok, here's pics of the objective from both sides. Sorry for the terribly missed focus. Was in a hurry and using the "magnificent" camera interface of a cell phone...


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Ichthyophthirius



Joined: 07 Mar 2013
Posts: 993

PostPosted: Thu Apr 02, 2020 1:05 pm    Post subject: Reply with quote

Thanks! No word on the asterisk, but here is at least a bit of information on the Metalloplan optical outfit you have (just in case you haven't seen this brochure yet): https://www.leitz-ortholux.de/pdf/metalloplan_6x6.pdf
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