Re: [OM] Ebay 20% off sale Mar 9

Subject: Re: [OM] Ebay 20% off sale Mar 9
From: Moose <olymoose@xxxxxxxxx>
Date: Mon, 12 Mar 2018 12:23:02 -0700
On 3/12/2018 11:18 AM, Jan Steinman via olympus wrote:
Thanks for the report, Don. Was this 2D or 3D work?

I did some work with the FC-1 and twin macro flashes, but they were just lying 
on the table, NOT mounted properly to the lens, and the subject was 2D.

To be honest, I bought it in large part because it seems neato, I couldn't afford one back when, and I can now. :-) Dean's paeans didn't hurt, either. I only have a couple of rather vague ideas of what to shoot with it.

My first thoughts aren't about extreme mags, just a bit more than I can do with 
the 38 mm.

Lighting is probably going to be "fun" to work out. I do have a couple of ideas. Rather than all the Lieberkuhn illumination for lighting from below through a transparent/translucent stage, I'm thinking of the 4x5 'light table' I've used successfully for suitable subjects for other uses. A Lieberkuhn reflector looks easy enough to fake, and I could easily just cut our black paper to lay on the light for the shadow part.

But before that, I'll try out the pair of tiny LED lights on goose-necks that I have. And then there's the poorly designed diffuser for the LED ring light I have. It continues around the LED ring on the inside, thus whacking any contrast in a conventional lens it's mounted on. I was thinking of the best way to black out that inside of the ring, but it might work well for this purpose.The Macro lenses protrude so far in front of the threads that they should be clear of the light directly hitting FEs.

The huge advantage over film is, of course, instant feedback on what works and 
what doesn't.

2D might be all it is good for, with such razor-thin DOF, like a microscope.

As with microscopes, focus stacking should be the cure. With fixed subject and rock solid copy stand and bellows, the stacking in software should be a doodle.

Mac Ro Moose


On 2018-03-12, at 11:10, Don Holbrook <donholbrook@xxxxxxxxxxx> wrote:

Jan, all the work I did with that lens was on a vertical bellows with 2 T32s 8 
inches off to the side.  1/4 inch subjects and film of course.  Haven't used it 
since. I hope the two of you figure out the digital way.

On March 12, 2018 at 1:14 PM Jan Steinman via olympus wrote:

Let us know what you get out of the 20/2, Moose!

I’ve been unsuccessful with it. It focuses too close for ring lights, although 
I’ve been able to side-light flat surfaces (stamps, coins) with twin lights.

It seems designed for Lieberkuhn illumination. The limited number of Olympus 
ones that were made have all disappeared onto the shelves of collectors.

There’s a guy who manufactures white plastic 49mm Lieberkuhn reflectors with a 20mm 
focal length with a 3D printer (let me know if you want the link). They are reasonable, about 
$7 plus an equal amount of shipping, but I haven’t been inspired yet.

I’m in the process of modifying an 18/3.5 hood for the purpose. I’m going to 
take off the cylindrical bit with the 72mm threads, then paint the inside flat white.

With proper illumination and focus bracketing, the 20/2 should do wonders, but I just 
haven’t found a practical way to harvest those wonders, so far.


On March 9, 2018 at 2:01 PM Moose wrote:

On 3/8/2018 9:28 PM, tOM Trottier wrote:

For the addicts among you...

$100 off the 20/2 Macro I've been stewing about sealed the deal.
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What if the Hokey Pokey *IS* what it's all about?
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