MicrobeHunter.com Microscopy Forum

Great tutorial, John ... but unfortunately [for me at least] your final 'image' displays the dreaded grey no-entry sign.

MichaelG.

I can claim absolutely no credit for these !!

http://www.microscopy-uk.org.uk/mag/ind ... exmag.html

...but they are wonderful.

MichaelG.

MicroBob wrote:... as finely engraved as if it were a measuring tool.

Which is what it is, of course

MichaelG.

MicroBob wrote:... It is intended for the microscope table with the stated number and was sold together with it. By using it you can quickly center the stage when necessary. "Nonius" means vernier scale with 0,1mm resolution.

... and "Tisch", I have just learned, means Table.

Thanks, Bob.

MichaelG.

- my non-collectable one was: Carl Zeiss Cross Hair Slide A cross hair slide used for centring circular rotating stages and ensuring flatness of the stage. Complete with original case and ion very good condition. Labelled in ink with batch number and QC authority. Price £20.83 + vat not sure where ...

I have just looked on Brunel's site, and they have a similar item from Jena 'Collectible' and priced accordingly. The descriptive text states We have included this Zeiss Jena item here because of its rarity value. Dating from about 1920 this is a numbered cross hair slide used for centring the rotat...

Michael, do I correctly understand that the "mission" is an afocal alternative to the complete Zeiss adapter, that will have the following features: [ ... ] Basically ... Yes Doing the job this way means that a single adapter should be useable with any matched set of optics ... regardless of where ...

The conclusion is that the 63mm lens is not really up to the performance of today's digital sensors. It was designed in a time when documentary photography in b/w it was sufficient. A quick question, Bob Is it presumed [or known] that the lens in the 45 60 29 adapter is the same one as in the MC63 ...

There was a very interesting thread about this photo adapter in the german mikroskopie-forum.de: https://www.mikroskopie-forum.de/index.php?topic=23644.0 The conclusion is that the 63mm lens is not really up to the performance of today's digital sensors. It was designed in a time when documentary p...

This adapter was mentioned on a recent topic: http://www.microbehunter.com/microscopy-forum/viewtopic.php?f=24&t=7835&sid=a7173c21eb7d5e75101c94066f2612af#p69111 ... but I thought it better to keep that discussion Olympus orientated. 45 60 29 is an afocal photo adapter which fits the Zeiss 40mm tube...

Chris Dee wrote: Conformal testing is beyond my resources. If simple comparative shots show anything worthwhile I'll post the results.

Thanks Chris ... That's what we need.

MichaelG.

Very informative post, John
Glad to see it's all worked-out very nicely

MichaelG.

MicroBob wrote:Hi Michael,
the middle two materials offer quite regular mesh sizes.

Bob

Sorry ... Yes, I should have been more specific

MichaelG.

What an interesting comparison, Bob ... Thanks for sharing the photos

All are O.K.for the purpose, I guess; but they wouldn't make very good 'grading sieves'

MichaelG.

Greetings, Tim

What are you interested in viewing ?

MichaelG

Michael: Thanks and noted. I was hoping there would be an obvious choice but think I'll have to compare both LEDs. I'll do some tests time permitting. I assume a DSLR might be able to do some comparative shots for CRI? Custom WB? Here's some bedtime reading for you, Chris: https://www.tandfonline.c...

It's rather short on technical detail, Bob ... but here is the PERSPEX page: https://perspex.com/product-ranges/perspex-illumination/perspex-spectrum-led/ The material I used is 'Colour 1TL2' ... it looks just like the material on X-Ray viewing boxes, but is allegedly optimised for white LED sources...

... In my NF I replaced the coarse frosted glass with a disc I made from a special acrylic glas that offers less light loss and better smoothness. This material is unfortunately not readily available, but other materials are worth a try. I don't know if this is the acrylic that you used,Bob ... but...

Hello, Chris The declared Colour Rendering Index will only be valid when running the LED at its rated current anyway ... So, taking Bob's advice into account, the right choice for you will be the one that looks right to you, using your 'scope. The perceived/equivalent Colour Temperature and CRI migh...

I've never considered myself an amateur. I am not a professional researcher, but I have several publications including one in biology. I came here because I am researching what microscope to buy to pursue my scientific interests, but then I might again publish a paper later which puts me outside of...

It's interesting how people here are concerned about not harming creatures that they observe. The author of the opening post made his position very clear: I am a devout Buddhist and harming other beings for recreational purposes does not sit well with me personally. and perhaps caused us all to ref...

Thank You

That appears to be uncommonly 'accessible' and very well produced.

I'm sure I will find it both fascinating and educational.
[one tends to lead to the other]

MichaelG.

Great images, Bob

I particularly like the little (Cocconeis?), which I don't thinkI have ever seen before.

MichaelG.

... Probably you could even take a landscape picture with it when used off the microscope. I tried it early this evening, Bob ... a very quick test, from the doorstep [it was raining] With a Chinese m4/3 to T2 adapter, the focus is at about 4 metres, I think ... When we have some better weather, I ...

... And here a cheap 39,5mm: https://www.edunikum.de/sehen-licht-und-farbe/glaslinsen/opti-media-achromat-2-linser-f-39-5-mm/a-5710/ In principle, Bob, I think that should work very nicely on Micro 4/3 ... and it's certainly an attractive price !! Note: the one on AliExpress is 500mm focal length ....

Now I see why it was said that the original Zeiss approach was "afocal": the 63mm "objective" (lens between the eyepiece and camera) in their adapter is used with an eyepiece, just as an "ordinary" 63mm camera objective (from the camera firm or compatible, and the closest available focal length) wo...

MicroBob wrote: ... On the other hand side I was just a couple of days told that a complicated 8-lens camera lens would be just right - by someone who should know it and has a lot of experience.

Likewise ... a Rolls Royce might be 'just right' if you want to kill a pig

MichaelG.

MicroBob wrote:Hi Michael,
from the 160mm system I remember that this Zeiss 63mm thing does the same job as a camera lens (=objective) in an afocal setup. Probably you could even take a landscape picture with it when used off the microscope. ...

Exactly

MichaelG.

There are different opinions how important the quality of the camera lens is. Zeiss used a simple 60mm achromat (two lenses!) and this was deemed good enough at the time. 60mm camera lenses are quite rare. Please forgive my pedantry, Bob ... The Zeiss attachment incorporates an objective [ sic ] of...

Its been a fun few days setting up this new (to me) microscope. It is an Olympus BHS BH2 with Phase and DIC. I don't have any Phase objectives (yet) so I haven't had a chance to try that part. I have been playing with the DIC quite a bit. [ ... ] I'm having a blast :D What a tremendous start !! Tha...