Search found 2888 matches

by Chris S.
Wed Oct 14, 2020 8:48 pm
Forum: Equipment Discussions
Topic: New Mitutoyo apo 10x
Replies: 48
Views: 4434

Re: New Mitutoyo apo 10x

First the good news: I've tested more Mitutoyo objectives than I can count, and inspected all of them visually as a first step. I see nothing unusual or disturbing shown in any of the images you've posted. Now the bad news: The visual appearance of a Mitutoyo objective tells you very little. I did o...
by Chris S.
Mon Oct 12, 2020 9:50 pm
Forum: Equipment Discussions
Topic: Canon EOS RP + Sigma 150mm Macro + Nikon CFI Plan 10x
Replies: 4
Views: 973

Re: Canon EOS RP + Sigma 150mm Macro + Nikon CFI Plan 10x

Nice demo! :D

I had to look up jaggery, as I'd never heard of it. Sounds tasty.

--Chris S.
by Chris S.
Sun Sep 27, 2020 7:57 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Mitutoyo blemishes... or inflated expectations?
Replies: 7
Views: 1069

Re: Mitutoyo blemishes... or inflated expectations?

Lou, Agreed that if this lens has been disassembled, it's junk. However, from the images Greg linked to, I'm not sure that anyone has disassembled this lens. Looking into an objective can fool the eye (or at least my eyes)--things are not always in the location they appear to be. I wouldn't condemn ...
by Chris S.
Sun Sep 27, 2020 7:19 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Mitutoyo blemishes... or inflated expectations?
Replies: 7
Views: 1069

Re: Mitutoyo blemishes... or inflated expectations?

Greg, I don't see anything in your documentation that would be an obvious cause of significant image degradation. Take a look, for example, at Mitutoyo 50x with chips in glass, tested . This said, even a cosmetically impeccable Mitutoyo objective can be an optical disaster. Also, I wouldn't expect a...
by Chris S.
Sat Sep 26, 2020 11:28 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Laser aiming and focus in photomacrography
Replies: 51
Views: 44485

Re: Laser aiming and focus in photomacrography

Iconoclastica, The 3V diode draws maximally 45mA, so the max power uptake is 135mW. Does this need a cooling body? The design could remain much simpler and more compact if the housing could be left out. Or perhaps replaced with a tightly fitting piece of aluminium tube. Agreed that this small laser ...
by Chris S.
Thu Sep 24, 2020 1:56 pm
Forum: Equipment Discussions
Topic: Mitty M Plan Apo 100x/0.70 WD 6
Replies: 4
Views: 1168

Re: Mitty M Plan Apo 100x/0.70 WD 6

Lou Jost wrote:
Thu Sep 24, 2020 5:40 am
I imagine the 100x is nearly telecentric? If so, you could stitch four of its images and duplicate the FOV of the 50x but at a 25% higher resolution.
It can be treated as "effectively telecentric," as the depth of field is exceedingly shallow. So yes, I think stitching could work with it.
by Chris S.
Wed Sep 23, 2020 11:44 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Laser aiming and focus in photomacrography
Replies: 51
Views: 44485

Re: Laser aiming and focus in photomacrography

I've taken far too long to reply--my apologies. Family health issues intervened. In this implementation, there is no danger of the laser hurting the sensor. Let me explain. In the configuration presented in this thread, the light from the laser never has a chance to reach the sensor in any damaging ...
by Chris S.
Wed Sep 23, 2020 11:12 pm
Forum: Equipment Discussions
Topic: Mitty M Plan Apo 100x/0.70 WD 6
Replies: 4
Views: 1168

Re: Mitty M Plan Apo 100x/0.70 WD 6

Pawel, I use both the Mitutoyo 50x/0.55 and the 100x/0.70. I’ve also tested other people’s specimens of both lenses, so know that my particular lenses are good ones. However, I don’t have examples of stacks at hand that I’m at liberty to share. When my interest is supporting scientific study or sati...
by Chris S.
Mon Sep 21, 2020 10:48 pm
Forum: Image Hosting Procedures
Topic: Image hosting procedures: the short story
Replies: 24
Views: 6295

Re: Image hosting procedures: the short story

. . . (To determine the URL of an image that is attached to another post, use your browser's function to "Open image in new tab" or its equivalent (the exact name varies between browsers), then copy the URL from that new browser tab. It will be something like "https ://www .photomacrography.net/for...
by Chris S.
Thu Sep 17, 2020 11:29 pm
Forum: Equipment Exchange
Topic: Mitutoyo Plan Apo 7.5x *SOLD*
Replies: 4
Views: 957

Re: Mitutoyo Plan Apo 7.5x For Sale

Just wanted to clarify, the price is 700 British Pounds, not sure what that would be exactly in Euros or Dollars, maybe wait for pound to drop ;) Oops--time for me to get computer glasses. So in pounds it's about $907 USD. Still a nice price on a lens that seldom appears from solid second-hand sour...
by Chris S.
Thu Sep 17, 2020 3:22 am
Forum: Equipment Exchange
Topic: Mitutoyo Plan Apo 7.5x *SOLD*
Replies: 4
Views: 957

Re: Mitutoyo Plan Apo 7.5x For Sale

I don't know Adamski personally, but will comment on this offer. The several Mitutoyo 7.5x objectives I've tested, and the one I own, have all been exquisite. I get the impression that Mitutoyo assigns the building of these objectives to one of its best builders, and that this builder has particular...
by Chris S.
Mon Jul 06, 2020 11:54 pm
Forum: Equipment Discussions
Topic: Recommendations for linear stage for use with 10x objective
Replies: 18
Views: 2808

Re: Recommendations for linear stage for use with 10x objective

Alison, you're getting good advice. The goniometer there, and others I saw in the forum, are quite pricey, and I'll probably just stick with my cut foam wedges for tilting my specimens. While I find a goniometric stage tremendously useful, they are, as you say, pricey. (My rig, The Bratcam , include...
by Chris S.
Mon Jul 06, 2020 12:24 am
Forum: General Discussion Forum and Community Announcements
Topic: Anniversary: 7 years since joining PM.net
Replies: 6
Views: 1713

Re: Anniversary: 7 years since joining PM.net

Steve, Seven really good years. When I look at your images, I always expect and see a display of meticulous craftsmanship and vision that is both distinctly individual and compelling. When I read your words, I find them thoughtful and informative. Thanks for all you've added so far. Here's hoping fo...
by Chris S.
Wed Jun 24, 2020 1:55 am
Forum: General Discussion Forum and Community Announcements
Topic: Forum upgrade completed
Replies: 35
Views: 7273

Re: Forum upgrade completed

I still have a couple of PMN forum tabs open from before the changeover, and can see what Elf is pointing out. (Clearly, the tab titles have gotten reversed--they used to place the name of the forum first, with details of the tab next. Now this formation is display in reverse order--and often trunca...