M27 to rms adapters

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Tracar
Posts: 9
Joined: Wed Feb 03, 2021 3:49 pm
Location: Holden Alberta Canada

M27 to rms adapters

Post by Tracar »

i have an older axioskop50 its rms.
a friend has given me a Zeiss Epiplan Neofluar 5x / 0,15 HD Objective to use while my set gets shipped to me .#44 23 24 this is M27.
im eventually upgrading my axioskop to a uv led in the right NM


has anyone used an adapter and are there any issues with doing this ?
Last edited by Tracar on Thu Jun 10, 2021 8:10 pm, edited 1 time in total.
Holden Alberta Canada.

Lou Jost
Posts: 5933
Joined: Fri Sep 04, 2015 7:03 am
Location: Ecuador
Contact:

Re: M27 to rms adapters

Post by Lou Jost »

Good question, I am looking for an adapter for a 27mm and/or 26mm objective to 25mm.

Pau
Site Admin
Posts: 6038
Joined: Wed Jan 20, 2010 8:57 am
Location: Valencia, Spain

Re: M27 to rms adapters

Post by Pau »

I think that for normal use it will work pretty well, with some caveats:
- The M27 adapted will not be parfocal with the RMS ones (or you need to put RMS extensions of similar length)
- be sure that the peripheral light way is occluded by the adapter, it likely will be
With a 5X likely you wouldn't have issues of the objective hitting the sample if it is a slide or DIC issues doesn't apply (with higher magnification they could do)
Pau

Tracar
Posts: 9
Joined: Wed Feb 03, 2021 3:49 pm
Location: Holden Alberta Canada

Re: M27 to rms adapters

Post by Tracar »

i just ordered the 6 adapters from m27 to rms, with the addition of a adapter ring to convert my one super expensive 100x RMS to a m27 to fit the other adapters to bring all the objective lengths the same from the turret.

i will probably piddle with how the uv gets obscured by the adapter , nothing a port and polish and a bit of mirroring cant fix.. im hoping lol
Holden Alberta Canada.

Tracar
Posts: 9
Joined: Wed Feb 03, 2021 3:49 pm
Location: Holden Alberta Canada

Re: M27 to rms adapters

Post by Tracar »

I played around with a few options, adapters, designing new adapters, but i did not see any beneficial advantages so i am trying a different path, i heard that the axiosop came in a m27 reflected only version, but i have never seen one for sale, so im going to modify mine to do the same with the exception of transmitted light too. this may be of interest, and then again it may not be. anyways its posted here .
i started out with ordering a second turret. the axioskop50 nomarski DIC version,
disassembled and prepped it for machining... and making the light opening bigger to work with reflected light.
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Remove the brass DIC slide holder things
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Remove the turret, i had to warm it up hot to the touch to loosten all screws.
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i had to cnc a negative of the part to hold and center the turret while i cut it
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Like a glove
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the cutting:

after the roughing and finish pass i was ready to hand finish and chemicaly blacken the newly exposed brass.
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I asembled the turret and she looks and functions like new !

now to take the threaded DIC slider holder things to a machine shop to get resized from m20 to m27.
Time to hunt down a good shop !!!!!!!

Im hoping the advantages of being able to use m27 and m20 objectives make it usefull in all areas
That and the fact i have full set of epiplan neofluars






anyways , i will keep everyone up to date
Last edited by Tracar on Thu Mar 18, 2021 10:09 pm, edited 2 times in total.
Holden Alberta Canada.

Scarodactyl
Posts: 1616
Joined: Sat Apr 14, 2018 10:26 am

Re: M27 to rms adapters

Post by Scarodactyl »

Very impressive! Looks like a tricky project but you handled it quite well.

Tracar
Posts: 9
Joined: Wed Feb 03, 2021 3:49 pm
Location: Holden Alberta Canada

Re: M27 to rms adapters

Post by Tracar »

Scarodactyl wrote:
Thu Mar 18, 2021 8:30 pm
Very impressive! Looks like a tricky project but you handled it quite well.
Thanks for the kind words. , this was the easy part. Still have to find someone to do the second part :wink:
Holden Alberta Canada.

Tracar
Posts: 9
Joined: Wed Feb 03, 2021 3:49 pm
Location: Holden Alberta Canada

Re: M27 to rms adapters

Post by Tracar »

im heading to a friends to machine the new threads, Fingers crossed..

also picking up a Olympus BX dark-field cube with elliptical mirror, hopefully its large enough to get ground to shape and fit the axioskops 3fl slider without too much modding :)
Holden Alberta Canada.

Tracar
Posts: 9
Joined: Wed Feb 03, 2021 3:49 pm
Location: Holden Alberta Canada

Re: M27 to rms adapters

Post by Tracar »

I completed the hard part today, with a little play on a lathe,
After all that fun i think i have a better than stock machine, i dont think the brass has blackened enough so want to look into a spray or paint on.
Next is to wait for the olympus bf/df cube to modd for the 3fl slider. ( this should be fun .......)
At least i get to retain the DIC slider slot for future use
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Holden Alberta Canada.

Tracar
Posts: 9
Joined: Wed Feb 03, 2021 3:49 pm
Location: Holden Alberta Canada

Re: M27 to rms adapters

Post by Tracar »

Finally had the time to finish this conversion project of a regular old axioskop 50 into a tool that can do more than originally designed to do..... And i have to say it turned out better than i thought it would.
I had to take an elliptical mirror from an olympus cube . Remove it and mod it to fit the 2F axioskop slider.
This along with a light source lense change. (The hardware changes in the above post ) and a bit of black 3.0

Started out by removing the mirror from the olympus cube. It was held in by a small anount of a rubber glue around the edges
Then had to remove some of the glass on the edge of the mirror so it can fit in the slider where the original 50/50 mirror was by wet sanding very carefully !! Each side a flat spot.
Removed morror
Removed morror
Mirror in
Mirror in
Mirror in
Mirror in


And after all this i was getting a very bad glare which took alot of the viewing area .
By the shape of the flares i knew something was not centered ! Had to be the mirror.
Bad glare
Bad glare
To fix this i had to remove the adjustable mount from the slider ( the part that is held in place by the 4 screws and 4 gobs of grey epoxy as the reflected light was not centerd and had to be adjusted so ) and also to make a washer by trial and error on the right size internal opening to solve the problem. I ended up using the center of a dvd. Haha and placing it on the eyepiece side of the cube. To cut the unwanted rays... i will re epoxy this after the entire microscope is cleaned and aligned
Washer
Washer
Washer
Washer
The pictures below are not as good as viewing with the naked eye 🥰
An old cpu i smashed:
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A mosquito larva slide with a white paper background
M1
M1
M3
M3
M2
M2

So im happy with how everything turned out. I can use RMS and m27
I even re coated the light paths with some black 3.0 to help with keeping things super dark and clear
Next is to have it professionally cleaned and realigned.

There is a few small areas i will improve on and first is in the upper light guide. The way the lenses are only puts i would say half the light to the mirror and even less thru the objectives. My fix was to add a concave lense inline to change the angle....
So i will take some measurements and locate the right lense with the right focal points to get better results.... the only thing better would be to find the right parts from the EPI only version of this scope. But thats for me is not a priority as the pictures as you can see are very good and bright..
Next find a thin optical glass filter to replace the dvd washer. I can place it in my jewlers lathe and hand paint it. This will keep the dust out
Lastly to machine the sliders bottom plate to the correct size hole and re-blacken..and reinstall

To date i made :
UV led light source
White full spektrum LED.
RGB laser light source. ( need to play with this one 😃 )
365nm led source
Holden Alberta Canada.

Gary7574
Posts: 1
Joined: Thu Dec 07, 2023 9:42 am
Location: Hertfordshire, UK

Re: M27 to rms adapters

Post by Gary7574 »

Amazing job the pictures are brilliant.

Would not have thought such a job would even be possible, seriously impressive work.

Gary

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