Search found 2887 matches

by Chris S.
Tue Apr 28, 2020 1:50 am
Forum: Equipment Exchange
Topic: WTB : Mitutoyo Mplan Apo X20 .42
Replies: 9
Views: 2029

you have to watch out for sellers from china, they often offer fakes. Tomek, do you have evidence of this? I've tested a lot of Mitutoyo objectives, including some from China, and never have I seen a fake. I have seen real Mitutoyo objectives that performed badly--apparently due to rough handling t...
by Chris S.
Thu Apr 16, 2020 12:50 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Trouble shooting butterfly wing scales
Replies: 6
Views: 4290

Ranstice, I've moved your thread from the gallery to Technical Discussions, where you're more likely to get helpful feedback on your issues. I also added a couple words to the title of your post for the same reason. As a first step, I'd suggest shooting a much deeper stack than 40 images, and make s...
by Chris S.
Wed Apr 15, 2020 3:43 am
Forum: Equipment Discussions
Topic: Computer screen
Replies: 19
Views: 3687

What I found is that even on the calibrated screens in the printing lab, it's not always the same. It could be quite different on two different types of papers. Clarnibass, To me, reading what you wrote sounds like a mistake is being made somewhere in the chain between work on your computer and wor...
by Chris S.
Wed Apr 15, 2020 1:41 am
Forum: Equipment Discussions
Topic: Computer screen
Replies: 19
Views: 3687

Clarnibass, I'd suggest that when choosing a monitor, a key question is: Do you want a screen that is pleasant for you to look at, and nothing more? Or do you want a screen that will help you prepare photos for print or for other people to display on their screens? If the former, then you can probab...
by Chris S.
Sun Apr 12, 2020 2:14 am
Forum: Equipment Discussions
Topic: Zerene : to raid or not to raid ?
Replies: 30
Views: 3877

Yeah, Prime95 is the one. What happened was, just to share it, I had a cool looking CPU heat sink from another project, decided to put it on the i7, the mistake was I simply added some thermal paste over existing leftover (semi-dried up) . . . then it started to crash whenever I ran Zerene After Pr...
by Chris S.
Sat Apr 11, 2020 3:06 pm
Forum: Equipment Discussions
Topic: Zerene : to raid or not to raid ?
Replies: 30
Views: 3877

yes, I had thermal issues before with an old i7 CPU running Win 10, and I did not know what was going on, until Rik told me to run a numeric app (sorry I forgot the name of it) . . . so I re-applied thermal paste on the CPU and that fixed the problem. Numeric App sounds like CPU-Z, fits the name pe...
by Chris S.
Wed Apr 08, 2020 3:07 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Advice please: High NA air objective with small WD
Replies: 9
Views: 3139

In principle, I think it should be possible to structure the illumination beam so as to provide asymmetric lighting for modeling, by sending light through only a part of the rear aperture. But I have not tried engineering such a beast, so I have no good idea how difficult that would be. (Murphy's L...
by Chris S.
Mon Apr 06, 2020 11:40 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Advice please: High NA air objective with small WD
Replies: 9
Views: 3139

Enricco, Thanks for sharing your experience with the FS-60 microscope and its built-in axial illumination. “Flat and very low contrast ‘rabbit-in-the-headlights’ rendering” is exactly what I was afraid of. I certainly don’t want it. The NA on this objective is 0.90, so the illumination cone should h...
by Chris S.
Mon Apr 06, 2020 5:06 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Advice please: High NA air objective with small WD
Replies: 9
Views: 3139

Advice please: High NA air objective with small WD

Seeking advice, please. I've been offered an apo, high NA, air objective designed for no cover slip, that has a tiny working distance of 1.3mm. This objective has a wide front end that will make it nearly impossible to shine reflected light onto the subject. So in my view, subjects for this lens mus...
by Chris S.
Thu Apr 02, 2020 1:53 am
Forum: Beginners Micro
Topic: Approach to building a system
Replies: 2
Views: 2137

Re: Approach to building a system

1)Does it make sense to start by purchasing the objective first (even if I cannot test)? If this were a Mitutoyo objective, I'd say that it's never safe to purchase second hand without a test and return privilege. However, these Nikon objectives seem to be made of sterner stuff--I don't think they ...
by Chris S.
Mon Mar 30, 2020 12:09 am
Forum: Equipment Discussions
Topic: Good 10x objective: Nikon M Plan 10x/0.25 or Oly Plan 10x
Replies: 8
Views: 1832

Antonio, I have no knowledge about the Olympus objective, but the Nikon M Plan 10/0.25 finite 210/0 is a "known good" lens for macro work. For about twice the price, I see a nice-looking Nikon N Plan 10/0.30 160/0.17 listed on eBay; these are quite good, and to my mind worth the extra money. Avoid t...
by Chris S.
Thu Mar 26, 2020 10:37 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Zerene Stacker now has dust & hot-pixel removal
Replies: 52
Views: 12815

Rik, Delightful to see this added to Zerene Stacker! I've downloaded the beta, and am looking forward to trying out dust and hot-pixel removal. I am aware that Canon has a dust delete feature in many of its cameras. You take an out of focus image, at a large aperture, of something fairly bright, suc...
by Chris S.
Mon Mar 23, 2020 11:40 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Papilio ulysses
Replies: 37
Views: 6055

Re: Papilio ulysses

. . .do you have a histogram photo from a single shot? I'm interested cause your images are so nice bright do you shoot expose to the right? My experience with my 50x objective is that must under expose a lot cause my highlight blowing out. Marco, Like you, I leave extra space at the right side of ...
by Chris S.
Tue Mar 17, 2020 12:26 am
Forum: Equipment Discussions
Topic: Vibration Test
Replies: 8
Views: 1221

Jin, I don't know a single accurate and simple test. Perhaps someone else does. I can suggest a number of tests that I would use together. Are you going to light your images with flash or continuous light? Of course, continuous light is much less tolerant of vibration. One test here would be to shoo...
by Chris S.
Sat Mar 14, 2020 3:02 am
Forum: Equipment Exchange
Topic: Wanted NIKON M Plan, 40/0.5 ELWD, 210/0 or 60/0.7
Replies: 4
Views: 2366

Re: Wanted NIKON M Plan, 40/0.5 ELWD, 210/0 or 60/0.7

Antonio, I have four specimens of the Nikon M Plan 40x/0.5 ELWD finite objective that you ask about, and I only need one. One specimen has been spoken for by another form member before you asked, but I have the three others. I also have a specimen of the Nikon M Plan 60x/0.70 ELWD that I don't need,...