Search found 91 matches

by PeteM
Wed May 11, 2022 9:59 pm
Forum: Equipment Discussions
Topic: Olympus UIS DIC
Replies: 4
Views: 187

Re: Olympus UIS DIC

The metallurgical turret messing up spacing sounds likely to me as well. FWIW, when I couldn't find a second turret affordably (I want one dry DIC, one oil immersion DIC with some lower mag finders) but kept seeing the U-D6REM showing up at a third to half the price I took a chance on one. It's ugly...
by PeteM
Sat Apr 30, 2022 9:50 am
Forum: Equipment Discussions
Topic: How to differentiate a PLAN FLUOR lens?
Replies: 3
Views: 150

Re: How to differentiate a PLAN FLUOR lens?

Fluor objectives are generally pass more light in the UV portion of the spectrum - so you'd see the differences in UV microscopy. In addition they often have higher numerical apertures (better resolution) at any given magnification and better color rendition. You might see a bit less color fringing ...
by PeteM
Tue Apr 26, 2022 7:11 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Test, using Teleconverters and/or extension tubes on a microscope (I found what was wrong)
Replies: 32
Views: 3370

Re: Test, using Teleconverters and/or extension tubes on a microscope (I found what was wrong)

I'm coming to this a year late, but do have a possible work-around to put a teleconverter "inside" a Nikon finite trinocular head. Use a Nikon teaching head as a 50-50 trinocular head. You'll have 1.25x magnification and need only a Nikon dovetail mated to Nikon bayonet mount -- and then to the tele...
by PeteM
Sat Apr 16, 2022 9:36 am
Forum: Equipment Discussions
Topic: Looking for least expensive variable 12VDC 8A power supply
Replies: 24
Views: 1446

Re: Looking for least expensive variable 12VDC 8A power supply

This might be another possibility: https://www.amazon.com/gp/product/B0899QMF4P/ref=ppx_yo_dt_b_asin_title_o05_s00?ie=UTF8&psc=1 I recently installed one of these to fit inside the base of a Nikon Microphot, which uses a 100 watt halogen lamp. It's fully dimmable with an ordinary dimmer. Burned it i...
by PeteM
Sun Apr 10, 2022 5:24 pm
Forum: Administrator's Appreciation Gallery...Macro and Close-up Images
Topic: beard stubble
Replies: 8
Views: 728

Re: beard stubble

As intriguing a self portrait as I've seen. Looks to have been painted by an abstract artist.
by PeteM
Wed Mar 09, 2022 9:04 pm
Forum: Equipment Discussions
Topic: LED Light Bulb diffuser
Replies: 10
Views: 917

Re: LED Light Bulb diffuser

I like it - a sort of mega Ping Pong ball diffuser.
by PeteM
Sat Mar 05, 2022 2:07 pm
Forum: Photography Through the Microscope
Topic: Variations with Sulfur
Replies: 5
Views: 679

Re: Variations with Sulfur

Looks like a great setup - thanks for sharing it.
by PeteM
Sat Mar 05, 2022 9:07 am
Forum: Equipment Discussions
Topic: 8x Lomo objectives from Ukraine
Replies: 11
Views: 1021

Re: 8x Lomo objectives from Ukraine

On somewhat the flip side, I've bought items in the past from a reliable and honest Russian seller. My feedback a week ago was along the lines of "Excellent and honorable seller, who I will be happy to buy from again if and when Putin stops his brutal invasion of the Ukraine ." Most Russians have no...
by PeteM
Fri Mar 04, 2022 10:13 pm
Forum: Photography Through the Microscope
Topic: Variations with Sulfur
Replies: 5
Views: 679

Re: Variations with Sulfur

Wonderful images.

Curious how you melt the sulfur to get a thin melt, without risk of pushing it too far? Something like a hot plate set at something like 250F?
by PeteM
Thu Feb 24, 2022 12:55 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: 3 microscope objectives, ? quality
Replies: 11
Views: 729

Re: 3 microscope objectives, ? quality

Ben, these are all finite objectives (not infnity) with a 160mm tube length. All should be usable for routine microscopy. The Motic is semi-plan and a pretty routine objective. The Zeiss 20x is Plan - and likely wants to be paired with correcting eyepieces. I'm not sure about the correction requirem...
by PeteM
Sun Feb 06, 2022 9:27 am
Forum: Equipment Exchange
Topic: Part for Wild M3Z
Replies: 7
Views: 593

Re: Part for Wild M3Z

In my case (Leica MZ6, and similar to your Wild M3Z), the 6mm OD and 3mm ID worked out. The flange is useful in keeping the bearing aligned on the cam without requiring the bearing ID to be either an interference fit (hard pressed) or permanently attached to the mating shaft. Sourced (and cheap) fro...
by PeteM
Tue Feb 01, 2022 12:17 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Accuracy of Correction Collar scale markings?
Replies: 16
Views: 721

Re: Accuracy of Correction Collar scale markings?

Congratulations on the successful surgery, Lou!

A pair of just-right tweezers can help hold and align the screws. A jeweler's screw-holding screwdriver can sometimes stay more or less centered on the screw itself.
by PeteM
Sun Jan 30, 2022 2:37 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Accuracy of Correction Collar scale markings?
Replies: 16
Views: 721

Re: Accuracy of Correction Collar scale markings?

Lou, at least some correction collars have physical stops at the high and low points. If yours does, it should be possible to get close by centering the marked range and the actual range. That could be good enough given that actual observation is best to tweak things once you're in the ballpark.
by PeteM
Thu Jan 27, 2022 9:36 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Accuracy of Correction Collar scale markings?
Replies: 16
Views: 721

Re: Accuracy of Correction Collar scale markings?

Lou, I've had some luck freeing up correction collars - though not with your $$$ objective. First step is to apply gently a bit of heat to get the grease moving. $20 will buy a pencil-like hot air gun to apply controlled heat. If it frees up with a bit of warmth, chances of a fix are pretty good. Se...
by PeteM
Wed Jan 12, 2022 9:24 pm
Forum: Nature Photography -- Macro and Close-up
Topic: Winter fairy tale
Replies: 25
Views: 1613

Re: Winter fairy tale

Gorgeous images. Thanks for posting them.