Re: [OM] 20mm f2 and Lieberkuhn Lighting

Subject: Re: [OM] 20mm f2 and Lieberkuhn Lighting
From: Moose <olymoose@xxxxxxxxx>
Date: Fri, 16 Mar 2018 15:06:32 -0700
On 3/16/2018 11:05 AM, Jan Steinman via olympus wrote:
From: JOHN DUGGAN <john.duggan10@xxxxxxxxxxxxxx>

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.
This guy has done all the math and will 3-D print them for you for under ten 

Description of the design process and results:

Order page:

I've ordered one.

Damn evilBay sale tapped me out for a while, but I’m seriously considering 
getting one of these, rather than cobbling something together.

He has put a lot of work into getting the proper parabolic shape and focal 

But I think he has worked on the assumption that they are mounted on filter threads a couple of mm in front of the lens FE, not ~17 mm behind. A 20 mm or so difference is huge for any such calculation. I'll see how it works when it gets here.

Better would be to duplicate the Oly ones on a 3D printer.

Reflective Moose

He even sells a set of four for Canon 62mm thread-size macro lens, for use at four 
different reproduction ratios. But I’m thinking just about any old bit of white 
stuff you can put there will work Pretty Durn Well(TM).


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