Darkfield using Olympus BH2/BHS

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sombre
Posts: 11
Joined: Mon Jul 30, 2018 8:14 am

Darkfield using Olympus BH2/BHS

#1 Post by sombre » Wed May 22, 2019 5:57 pm

Assistance please,
My microscope is an Olympus bh2/bhs and i should like to be able to view subjects in darkfield.
Unfortunately there is no filter holder beneath the condenser in which to place a darkfield patch stop.
Does anyone know a way in which i can work round this problem, or if there is an attachment or
alternative condenser i could get. If so please let me know.
I have spent countless hours searching the net for some kind of fix, but to no avail, I would therefore be most grateful for
any advice.

Many thanks,
Sombre

lightshape
Posts: 3
Joined: Wed Jan 23, 2019 9:47 pm

Re: Darkfield using Olympus BH2/BHS

#2 Post by lightshape » Wed May 22, 2019 7:31 pm

Not that easy to answer, it would help to let us know which condenser you have.
You'll have to build some kind of support to fit under/inside the condenser where you could put some stops.
But you won't be able to realize good darkfield for higher magnifications that way anyways.

Maybe this could give you kind of an idea:
https://www.ebay.com/itm/264323855175

You could also try to find an affordable phase contrast condenser,
you would get nice and easy dark field on the lower magnifications with the ph stops.
And you could upgrade your BH to 1-2 ph objectives later..

Regards,
Stefan

Roldorf
Posts: 325
Joined: Tue Apr 23, 2019 6:58 pm
Location: Northern Germany

Re: Darkfield using Olympus BH2/BHS

#3 Post by Roldorf » Wed May 22, 2019 7:33 pm

BH2 DCD is the dark-field condenser for your microscope see here: http://www.alanwood.net/downloads/olymp ... ochure.pdf


Also here is another post: http://www.photomacrography.net/forum/v ... hp?t=10839

Lots of reading :lol:
Alan
Bresser Science Infinity 4x 10x 40x 60x 100x oil. Canon EOS 4000d

sombre
Posts: 11
Joined: Mon Jul 30, 2018 8:14 am

Re: Darkfield using Olympus BH2/BHS

#4 Post by sombre » Fri May 24, 2019 9:37 am

Many thanks to all for the help and suggestions.
I think I will go down the diy route until such times as I can find the correct condenser etc:
Again many thanks.

Sombre

carlh6902
Posts: 102
Joined: Wed Mar 04, 2015 2:24 am
Location: Olathe, KS
Contact:

Re: Darkfield using Olympus BH2/BHS

#5 Post by carlh6902 » Mon May 27, 2019 6:58 pm

sombre wrote:Many thanks to all for the help and suggestions.
I think I will go down the diy route until such times as I can find the correct condenser etc:
Again many thanks.

Sombre

There is a seller on eBay selling a nice system that works with the standard BH2-CD abbe condenser. Check it out.

Carl
--- If you're in the Kansas City area and you need help with an Olympus BH-2 scope, PM me. I love to work on these things ---

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