Re: [OM] 20mm f2 and Lieberkuhn Lighting

Subject: Re: [OM] 20mm f2 and Lieberkuhn Lighting
From: Jan Steinman via olympus <olympus@xxxxxxxxxxxxxxxxx>
Date: Sun, 8 Apr 2018 15:14:53 -0700
Cc: Jan Steinman <Jan@xxxxxxxxxxxxxx>
> The reflector is slightly imperfect, compared to what Oly made. There was a 
> little over spray, little nodules, on the 
> end of the threads, and it took careful work with X-acto? knife to clean up. 
> Even then, it's a little trickier, more 
> delicate, to screw on than the 18/3.5 49-72 mm hood.

Thanks for the report on the Shapeways reflector, Moose.

It’s encouraging that it worked well, as I have never had the 20/2 macro do 
useful things with other lighting techniques. But it’s also discouraging that 
the quality of the CNC plastic one was less than great.

> Altogether a nice solution to illuminating small, opaque macro subjects.

Based on your report, I decided to hold on the Shapeways one, and have instead 
bought a 49-72 adapter from China for $1.98. I have no idea of the focal 
length, but it has a 26 degree slope that is slightly concave, so perhaps it 
will be useful. I’ll spray the inside flat white and see what happens.

Or mebby it will wait until I build my 3D printer. TheBuilder kindly made his 
CAD file downloadable. I have all the parts for the 3D printer; just need to 
put it together, right? Story of my life...


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