2,558 Brands 529 Categories All Departments

Trouble with OI-10 condensor

We can help you make your microscope purchase and get the best model right from the start. We stand behind our products and will do everything to help you after the purchase!

Trouble with OI-10 condensor

Postby Rocketcaver on Thu Feb 28, 2008 6:22 pm

A freind of mine is having some trouble, I thought I would post his question here and see what we can find out. He writes:

>Have you had experience using the Lomo Light/darkfield condenser OI-
>10?I know it is for use with the Biolam series R which is the one I
>have it fitted in,but for the life of me I cannot get darkfield
>conditions.The objectives I have fitted are all Lomo(3.5x0.10, 9x0.
>20,20x0. 40 and 40x0.65)
>I know this condenser should be used in darkfield only with objectives
>of less than the n.a. of the condenser,which is 0.7 so are the
>objectives I am using OK? If so... any ideas as to what may

Any thoughts on this would be greatly appreciated.
Posts: 11
Joined: Sun Sep 24, 2006 8:01 am

Postby Jne_K on Tue Mar 04, 2008 5:46 am


We forwarded your question to LOMO and this is their response. Hope it helps.

OI-10 is a very old LOMO condenser, I am not familiar with it.

Well, first of all try obvious:

Try to center the condenser
Try to center the light source
Make sure the condenser top optical element is oiled properly

If it does not help, there is a possibility that it is nit designed to work with this light source…
Thanks for posting with us
Joanie K - Your personal optics expert


Phone: (800) 504-5897
Fax: (847) 919-3003
Site Admin
Posts: 7665
Joined: Wed Sep 24, 2003 3:09 pm