Adaptors from 50 to 500$..how is it possible ?

[Marco68]

Hi All,

I have been searching adaptors for my Fuji xw2 mirrorless camera and i found :

https://www.microscopeworld.com/p-172-m ... ensor.aspx
450$

https://www.srb-photographic.co.uk/fuji ... 0633-p.asp
70$

http://vi.raptor.ebaydesc.com/ws/eBayIS ... spheader=1
60$

How is possible ???

Thanks from a beginner !

[Hobbyst46]

Price comparison set aside for a moment, I try to understand the products. E.G. the middle link, SRB. Citation (for Canon camera in this case, but it is the same principles as for the Fugi):
"The Canon EOS Microscope Set enables the use of a Canon EOS DSLR camera on a Microscope.
This set uses the principle of eyepiece projection, whereby the eyepiece is used to project the image onto the sensor of the camera.
The extension tubes that are included in this set can be used individually or together in order to increase and decrease magnification. The longer the length of the extension tubes the, the greater the magnification and image size.
Viewing and focusing will have to be controlled through the camera unit as it will not the par-focal with the eyepiece."

Now:
1) eyepiece projection is meaningful if an eyepiece is being used. But the adaptor is supposed to fit directly into the eye tube. Or photo tube. So no space for an eyepiece.
2) So it is direct projection from the objective, not eyepiece. It will work correctly if it is an infinity corrected microscope, but likely to produce aberrations if on a typical finite optics microscope (e.g. 160mm tube).
3) It is unlikely to give good results with finite optics microscope because of another reason: as cited, focusing on the sensor is not parfocal with the eyepiece.
Or I am completely wrong...

[MicroBob]

Hi Marco,
with all these adapters it is questionable what quality can be acheived. They are not offered for a specific microscope so the results will vary depending on the microscope it is actually used. For your future infinity microscope the projection optics should have no CVD correction. For an finity, like 160mm, microscope it should have a CVD correction in most (but not all ) cases. So this univversal solution can in average only be mediocre, perhaps good enough for web images in the less perfect cases. Any photo adapter that is far from parfocal with the eyepieces will lead to a deterioration of the image as the objectives are not used as intended.

Your new microscope will probably have very nice high eyepoint eyepieces. If you take a pancake camera objective and a couple of step down rings and a turned part you will probably be able to get a perfect photo setup.

Bob

[Marco68]

Thanks Hobbyst, Microbob,

I could theorically try both to make a bit of practise considering the adapter 2&3 is quite unexpensive.

Hi Microbob,

Just to understand better. Yes..you remember right..i am about to get a infinity microscope . Furthemore I have already a Fuji pancake 18mm f/2 with diameter 52 mm and the eyepieces are 10x/22 (i guess 30mm diameter).

I do not really know what CVD correction is, but if understand right, you suggest to connnect the following rings (from.52 to 30) to my above pancake ?

https://www.amazon.it/Concept-Stepping- ... B00JL4KRD6

Can you pls explain better what kind of "turned part" should i use ? How to connect and where to buy ?

Thanks

Marco

[MicroBob]

Hi Marco,
your eyepieces will offer a wonderful image that just has to be picked up by a camera objective. "Pancake" is used to be able to put the exit pupil of the eyepiece it the same place as the entrance pupil of the objective. "Pupil" is an optics term I won't be able to describe properly. The exit putil is where the eyepiece projects a sharp image (check with paper). The entrance pupil of the objective is about in the middle of the lens stack of the objective. They should fall round about in the same place. You've found it when closing down the camera objectives aperture leads to a dimmer image without vignetting. For your camera you can buy cheap step down rings, microscope adapters etc. For the connection to the outer diameter of the eyepiece you have to make a special part. This can be a 3D print or a part turned on a lathe or you improvise with a metal tube, paper and lots of glue . The adapter I showed is made of a piece of water plumbing material that was available.
If you can define the distance by experiment and supply the threaded ring that connects to the camera objective a machinist will quickly be able to turn the rest from a piece of aluminium of POM.

Bob

[david_b]

If you already have the camera and pancake lens, why not try first by setting up on a tripod?

[Marco68]

Hi David

It definetly makes sense what you say ! As soon as the Leica lands in my house it will be the first test i do with 18mm and 35 mm lens. !

One more question...i plan to share with a group of young students (my son's class ))) what i see in the microscope and an eyepiece camera could make sense as well to make it easy.

Which one makes sense :

https://www.amazon.com/gp/aw/d/B07H47HB ... B07RPQPR3M

Or

https://www.amazon.com/gp/aw/d/B07RTZYW ... JlZGlyZWN0

Thanks !

[Hobbyst46]

I do not know about these specific eyepiece cameras, but I suggest that any eyepiece camera you buy (there are several branded and non-branded Chinese eyepiece cameras on eBay) shall include a reduction lens, such as 0.5X. Otherwise the section of FOV caught by the camera will be too small.
Some fellows have been satisfied with Toupcam cameras. The Toupview software bundled with it is excellent.

[david_b]

Does the Fuji have HDMI output?

[Marco68]

Thanks David, yes it has a Mini (Type C) HDMI port and that could be a good solution even if an eyepiece camera is someway more pratical and easier to transport.
Toupcam camera seems intersting..but there is an infinite choice
http://www.touptek.com/product/showprod ... =en&id=108

[david_b]

Depending on your classroom setup, equipment availability and number of students, HDMI connection to a large stand-alone monitor may be a better solution than USB to a laptop or PC.

[Marco68]

Hi All !

Can you please give me a comment on this purely mechanical adaptor to connect my Fuji camera to the microscope ? It goes directly in the microscope tube.

https://www.adrianololli.com/articolo.asp?ID=5362#

Thanks !

Marco

[MicroBob]

Hi Marco,
this looks China made and might be available for a lot less somewhere else.

Bob

[MichaelG.]

Can you please give me a comment on this purely mechanical adaptor to connect my Fuji camera to the microscope ? It goes directly in the microscope tube.

That one sits in place of a 30.5mm eyepiece [common on stereo microscopes]
... Is that what you are looking for ?

MichaelG.

[Marco68]

Thank Michael. I have a brightfield binocular microscope. Leica DMLS. Eyepiece diameter 30 mm

[MichaelG.]

Thank Michael. I have a brightfield binocular microscope. Leica DMLS. Eyepiece diameter 30 mm

So ...

(a) it probably will not fit
(b) you would only be capturing the primary image from the objective

I think you need to look elsewhere.

MichaelG.

[Marco68]

Hi

Why shouldn't fit ? This is the eyepiece:

https://drive.google.com/file/d/1UWMq7Q ... p=drivesdk

What do you mean primary image of the objective ?

Thx

[MichaelG.]

Hi

Why shouldn't fit ? This is the eyepiece:

https://drive.google.com/file/d/1UWMq7Q ... p=drivesdk

What do you mean primary image of the objective ?

Thx

(a) You previously said that the eyepiece was 30mm, so 30.5 should not fit.
... but your photo shows it to be nominally 31mm so presumably the adapter would fit [rather loosely]

(b) The primary image is the one that the objective forms [*]
... So if you use this adapter [which, if I understand correctly, replaces the eyepiece with an empty tube] that’s what you will be photographing
Your instrument will therefore no longer be a compound microscope ... but effectively just an objective on the end of a tube.

This may, or may not, work for you ... I cannot judge.

MichaelG.

.

Edit: [*] for an infinity corrected system, read that as ‘the combination of objective and tube-lens forms’

[MichaelG.]

For the convenience of others who may wish to advise
Here is an English translation of the description:

Direct adapter, for mirror less cameras Fuji X mount microscope mount with eyepiece holder 30.5 mm. It fits in place of the eyepiece. The draught of the fitting is only 5 mm. Especially suitable for stereo microscopes. Note : To use the fitting, be sure to install the firmware for operating adapter rings on the camera. Caution : Due to the different focal planes between the eyepiece and the fuji camera, the focus must be re-calibrated by bringing the microscope lens closer to the object to be taken. For more information, please call us. Available for other mounts : Pentax; Canon eos; Canon FD; Minolta af; Minolta md; Contax-Yashica (manual focus); Screw 42x1 etc. please ask

Translated with www.DeepL.com/Translator (free version)

MichaelG.

[Marco68]

Thanks Michael !

I have tried to remove camera objective and eyepiece :

https://drive.google.com/file/d/1WeH-lv ... p=drivesdk

And ..you are right..it does not work. I can shoot from.the Fuji but i can't get it in focus

[MichaelG.]

Sorry to have disappointed you, Marco ... but at least you didn’t buy an adapter then find it would not work.

The basic problem is that the primary image is, by design, typically about 10mm down the tube ; and obviously you cannot focus that on the camera sensor unless you refocus the microscope.

Refocussing may be feasible with low powers on a stereo microscope [as per the seller’s note] but it is unlikely to be successful on the DMLS.

I think your best option would be to use the camera with lens [probably the 35mm] to do ‘afocal’ imaging.
... This was suggested earlier, by MicroBob and david_b
All you should need is a way of holding the camera, focussed at infinity, at a suitable position ‘looking into the eyepiece’

Wishing you good luck in this wonderful adventure

MichaelG.

[Marco68]

Yes..i saw Bob was advicing step down rings, i guess like these ones :

https://www.amazon.it/Concept-Stepping- ... 6526772108

But then I need to connect them to the outer part of the eyepiece with some "3D print or a part turned" ..and I guess I should provide a Cad file to some shop to have it done and i feel the.risk it will not perfectly fit is pretty high.

[Roldorf]

Try first with a tripod to hold the camera in position above the eyepiece. Then a least you will know how far above the eyepiece you need to be with any adapter you decide to make.

[MichaelG.]

This is the eyepiece:

https://drive.google.com/file/d/1UWMq7Q ... p=drivesdk

Looking again at that picture ^^^
You seem to be measuring the outside diameter of the tube into which the eyepiece fits.

Could you please confirm ?
... and also confirm the size of the filter thread on your camera lens

It may be a relatively simple matter to design an adapter

MichaelG.

[Marco68]

Hi Rolford,

I am right now trying as you suggested :

https://drive.google.com/file/d/1X-I1DM ... p=drivesdk

This is what i get , with 18mm lens (35mm crops the image), focus infinity, iso 200:

https://drive.google.com/file/d/1WyiwVU ... p=drivesdk

This is what i could get with smartphone:

https://drive.google.com/file/d/1X2qKTF ... p=drivesdk

In both cases the image is not sharp like i get with naked eyes, but still with the smartphone it is a little better

[Marco68]

Hi Michael,


Thanks all to be so supportive.. I am probably too much perfectionist ..but the fact i can not get the quality i want drive me crazy ))...or maybe it depends on the fact i am locked down in my house in Italy ?


Inner 30 mm :
https://drive.google.com/file/d/1X3Ecnq ... p=drivesdk

Outer:
https://drive.google.com/file/d/1X5FTd6 ... p=drivesdk

Camera lens has 52 mm diameter.

[MichaelG.]

Thanks, Marco

I would start with something like this ...
https://www.ebay.co.uk/itm/52mm-37mm-Fi ... 3216395972

[that one is a particularly low price, but there are many reasonably priced alternatives]

You could then build something onto it quite easily

MichaelG.

[Marco68]

Nice hint ! Thanks ! Very cheap ..so it is definetly worth to try.
Just i feel it will be not that easy to build the adaptor down to the inner (or outer? ) diameter of the eyepiece (from 37 to 30 mm). Being a binocular microscope the adaptor should be stiff enough to keep the weight of the camera (that is not that heavy being mirrorless, but still....)

[MichaelG.]

No need to build down from 37mm, Marco, that’s just a convenient aperture ... There is a big flat surface, so you could drill [say] three holes through it, and then attach it to the end of a thick-walled tube; or maybe the flange of a piece of plumbing.

MichaelG.

[Marco68]

Thanks Michael.. ! I read also again what Bob was writing above :
"If you can define the distance by experiment and supply the threaded ring that connects to the camera objective a machinist will quickly be able to turn the rest from a piece of aluminium of POM."