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Re: [OM] 20mm f2 and Lieberkuhn Lighting

Subject: Re: [OM] 20mm f2 and Lieberkuhn Lighting
From: JOHN DUGGAN via olympus <olympus@xxxxxxxxxxxxxxxxx>
Date: Fri, 16 Mar 2018 14:17:38 +0000 (UTC)
Cc: JOHN DUGGAN <john.duggan10@xxxxxxxxxxxxxx>
Mark, that would be very kind. Diameter of units, and depth measured using a 
straight edge across and measuring depth at right angle to straight edge  would 
be ideal. I assume there is very little curvature involved. An option would be 
discs of aluminium gently hollowed using a leather sandbag and egg shaped 
bossing mallet. Centre hole fitting onto a boss which in turn fits to the FRONT 
of my 20mm f3-5 (mk1 )lens.Overall size of stage plate would be useful for 
reference. I was going to use clear or frosted 95mm stage plates with a black 
card or alloy disc placed centrally - size to be determined experimentally 
!!!!I have been looking for mirror housings for years to use with my Leitz 
Trinocular microscope. As you say impossible to find at a realistic price. 
Regards John Duggan, Wales, UK

      From: Mark Dapoz <md@xxxxxxxx>
 To: Olympus Camera Discussion <olympus@xxxxxxxxxxxxxxxxx> 
 Sent: Friday, 16 March 2018, 1:44
 Subject: Re: [OM] 20mm f2 and Lieberkuhn Lighting
  


> On 18-Mar-15, at 3:00 PM, JOHN DUGGAN via olympus <olympus@xxxxxxxxxxxxxxxxx> 
> wrote:
> 
> Does anyone have info on Leiberkulm reflectors regarding the radius of the 
> reflecting surface. It should be straightforward to machine  in white plastic 
> or aluminium given this dimension. failing this I will experiment with the 
> curved bases of drinks cans or bottled gas containers etc.

I have both the PM-LM-20 and PM-LM-38 Lieberkühn reflectors and I can measure 
them for you if you want.  I also have the matching shade stage plate that goes 
in the VST-1 if you need measurements of it as well.  I always found the 
PM-EL-20 and PM-EL-38 mirror housings easier to use than the Lieberkühn 
reflectors but they’re nearly impossible to find now.

-mark

   
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