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Re: [OM] 20mm f2 and Lieberkuhn Lighting

Subject: Re: [OM] 20mm f2 and Lieberkuhn Lighting
From: Don Holbrook <donholbrook@xxxxxxxxxxx>
Date: Sun, 18 Mar 2018 13:00:48 -0400 (EDT)
Thank you very much!

> On March 17, 2018 at 5:53 PM Mark Dapoz <md@xxxxxxxx> wrote:
> 
> 
> 
> 
> > On 18-Mar-16, at 10:17 AM, JOHN DUGGAN via olympus 
> > <olympus@xxxxxxxxxxxxxxxxx> wrote:
> > 
> > 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.
> 
> The LM-38 has a very shallow curvature but the LM-20 is quite deep.  The 
> thickness of the reflector also changes from about 2mm at the edge to under 
> .5mm at the centre.  Rather than list all the measurements and try and 
> explain what they are, see the following Google folder for a series of photos 
> of the measurements for the LM-20, LM-38 and LM-SP: 
> https://drive.google.com/open?id=1V7Hc43Ld3H3ZXezag6CcPOJJyrhYSyWb 
> <https://drive.google.com/open?id=1V7Hc43Ld3H3ZXezag6CcPOJJyrhYSyWb>
> 
> -mark
> -- 
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