MicrobeHunter.com Microscopy Forum

sleekdigital wrote: ↑

Tue Jul 28, 2020 2:19 pm

I tried to do that,

By "do that" do you mean with the whole tube in place,
or does it break down into shorter parts ? (to allow the dslr sensor to get closer to where the usb sensor would sit.)

Thanks I am looking up the NDPL any moment now , , ,

45x 3.75mm Flourite NA 0.95 Oil PH It is interesting that your scope has a fluorite objective. That would have been very unique for it's day. and it most likely is a very good objective. Lots more to investigate if/when I get up to speed ! I wonder what particular advantage was desired when the flu...

Excellent, facinating, thanks for showing ! Charming little creature :) May I ask what lighting you used ? **[edit after seeing 75RR's reply:- or how you did the polarized] And perhaps how/where you found it, was it in rehydrated moss or something else ? I am full of questions :) and when I get my/a...

Fascinating, yes the 0 corresponds to the larger of the three clears, I'll document the others later, the 95 confused me, never heard of one of those. At first glance, two of the objectives have a dull patina (of age?) and two are silvery, which made me think that they were a mixed bunch, (not easy ...

Hello @Fred , superb images of the sycamore lace bug and others on your web site, were they all with the 380 ? and @garstro, @sleekdigital I am thinking of buying one of these microscopes ( or its twin, the 350 ) and wonder if one of you could please tell me a bit about the construction of the trino...

BramHuntingNematodes wrote: ↑

Mon Jul 27, 2020 9:11 pm

If you don't mind being non-plan there might be no need to get newer.

Yes, deffo happy with achro in my present state of understanding,

Would anyone like to educate me on what those numbers and the red symbol appearing in the little window mean, in my post #4

If , the Nikon will go in the bin. Oh, dont do that, I have a perfect bin here and I am not far south of you, in a little corner of land that stops you lot from bumping into France LOL! good luck with the experiment. I am watching the non-eyeball/dslr bit with interest, but I am a stage or few behi...

Thanks Bram, noted on the cleaning

The fork is a two-tined fork actually connected to the rest of the stand-- its screws are the largish, silver flat-heads. Thank you @Bram, well done, I see where you are, it turned out to be a sliding fit as-is, and now I see what is going on with the disk, has three clear apertures and the rest (a...

MichaelG. wrote: ↑

Mon Jul 27, 2020 5:11 pm

Here’s that patent, to get you started:

thank you but totally above my pay-grade, sorry.

apochronaut wrote: ↑

Mon Jul 27, 2020 3:35 pm

You also have a camera adapter.

It took me some time to figure out what it was! At first an inspection revealed nothing through it, till I found that the side arm (eyepiece tube ? presumably) was just very stiff but could be slid out of the way.

Aww c'mon, it's not that old! I think loosening the two screws on the sides of the fork :) ! maybe just me feeling old then ! which two screws and what fork :( I used a flat panel LED + diffuser propped up in front of the mirror, I have some other 3W star that I can try later. Below is more info on...

Hello, I have been given a very old microscope to play with and am looking for advice/suggestions how I should use &/or refurbish it. I dont know what is in the disk assembly, it looks to be a plain hole and assorted (dimming?) filters. I though to remove the complex substage gubbins to leave only t...

I bought a 185 objective by mistake once and had to buy an adapter to make it parfocal with the rest of the objectives on the turret. It was physically shorter So that would suggest a JIS PD (36mm) ? Have you still got it, can you measure its PD, or is there yet another variable out there ? I reali...

My op was about the compatibility of thread and was well answered by @75RR, so that's ok :) Thank you. regarding 185/195, 1year ago : http://www.microbehunter.com/microscopy-forum/viewtopic.php?p=68606#p68562 EDIT Yep, there is another variable - 'Chinese Student' (as well as 'DIN' & 'JIS') accordin...

To add to my confusion - objectives are not marked with 185 or 195, so how does one keep track of which is which if one's purchases get mixed up in a box ? If ebay sellers are to be believed ( ? ! ) the 185vs195 is not a DIN/JIS matter : one that I looked at lists both 185 and 195 for 160 tube. Spec...

This is a convenient reference: https://www.edmundoptics.co.uk/knowledge-center/application-notes/microscopy/understanding-microscopes-and-objectives/ Good ref, thanks. So MTL =160mm in DIN and 170mm in JIS Except I am still confused ! it describes what "conjugate distance" is in a finite system ( ...

This is a convenient reference: https://www.edmundoptics.co.uk/knowledge-center/application-notes/microscopy/understanding-microscopes-and-objectives/ Good ref, thanks. So MTL =160mm in DIN and 170mm in JIS Except I am still confused ! it describes what "conjugate distance" is in a finite system ( ...

It is something I have been meaning to try but didnt get the rountuit! till I saw your post and I have just ordered (on ebay) a cheap replacement iphone polarizing film to try. I have no idea if it is linear or circular even* ! Did you fix the heat problem from your lamp? because one film should go ...

MichaelG. wrote: ↑

Sun Jul 05, 2020 5:22 am

http://doriclenses.com/optical-componen ... enses.html

and have a lot to still to learn.

Thanks for the link,
fascinating stuff. I had no idea that balls were in such widespread use, other than in seances and futurology !

It can be removed by careful abrasion intended to put the lamp filament at 2f, Yes, thought of grinding but may involve too much polishing, depending. Wouldnt caustic soda be easier, the surface must be reasonably optical already for it to be a mirror. Yes I presumed 2f also, can you not do that wi...

MichaelG. wrote: ↑

Tue Jun 30, 2020 6:39 am

They are 3/4 balls, with the flat surface mirrored [aluminised]
and [used ‘sideways’]

Might it be undone with sodium hydroxide perhaps ?
Then you would have a planosuperconvex lens ? !

Thanks H. "depends on how the slide is next used" or by whom** it is next viewed :) :) ! I do have the means to use distilled water but not yet needed to**. Once upon a time I had access to RO but no longer, unless I buy some kit (which is a lot less expensive than it was ) My tap water was very har...

An interesting topic, I am not as experienced as you all and I am wondering if, or why, I should wipe dry ? I only ever stand my reused washed** slides and cover slips on edge over absorbent paper to air dry. What am I missing, what should I be looking for ? I assumed that by wiping with something I...

On an initial quick read** through it didnt seem to me that the ball lens was a big claim ? More to do with the mobility of the direction of the (converging) light, or lights if more than one are [s]required[/s] to be experimented with. I put converging in brackets cos they dont seem to be specifica...

MichaelG. wrote: ↑

Mon Jun 29, 2020 7:26 pm

three vertical dots near the top-right of the page and follow your nose.

Well done, got it now thanks, I followed your trail of white pebbles

75RR wrote: ↑

Mon Jun 29, 2020 6:27 pm

Yes, thread is the same. Parfocality is at 45mm

Thanks.

I have just discovered an interesting Zeiss patent from 1933 https://worldwide.espacenet.com/patent/search?q=pn%3DGB396325A This surely begs to be converted to LED .... another ‘project’ for the list. Yes, and yes ! I have LEDs but no optical marbles ! Other than calling up van Leeuwenhoek's spirit...

I asked this in another place but on second thoughts it would prob be best asked here (this way it will not take the other thread (on 60x objectives) off topic) ! Many ebay adverts for objectives show "DIN", I think this is the same thread as the RMS 0.8" thread which I have on my old (UK 60 - 70's)...

Here is photo of micrometer scale at 60X Objective with 10X Eyepiece. 600X total magnification. Photograph by using smart Phone S10E. The scale of micrometer slide is 10 micron per 1 scale. Thank you for showing your results with the 60x objective, very interesting and useful. I am new to the forum...