Search found 4720 matches

by Pau
Fri Dec 11, 2020 12:36 pm
Forum: Equipment Discussions
Topic: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)
Replies: 26
Views: 3791

Re: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)

Thanks for showing your tests! Duke, Your tests show very bad performance at the corners but also at the borders, what tube lens did you use? I'm not telling that it had performed badly as your 20X behaves excellently, but about the focal length. Your camera sensor seems a bit larger than mine but, ...
by Pau
Fri Dec 11, 2020 4:00 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Windows of Papilio ulysses wing scale
Replies: 16
Views: 1823

Re: Windows of Papilio ulysses wing scale

Chris, thank you!

This was the idea of my request, as I wanted to see if, despite being much less crisp, the 100% crop was showing more detail than the reduced full frame. It seems, at least with this subject, that the showed resolution increase is small.
by Pau
Thu Dec 10, 2020 5:12 am
Forum: Equipment Discussions
Topic: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)
Replies: 26
Views: 3791

Re: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)

... While I don't have the UPlanFLN 4x/0.13, I have a UPlanApo 4x/0.16, a UMPlanFL 10x/0.30, and an LMPlanFl 20x/0.40. I'll do a test of these this weekend to examine their coverage more critically, and report back. Hi David, It would be very nice to see your tests (and in particular the LMPlanFl 2...
by Pau
Thu Dec 10, 2020 4:59 am
Forum: Equipment Discussions
Topic: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)
Replies: 26
Views: 3791

Re: Testing Olympus UPlanFL N 4x 0.13 (FN 26.5)

I've got this objective and it performs well at the center, but very badly at the corners. There is excessive amount of coma and astigmatism... Even worse than Nikon CF PLAN 5x 0.13, which has less geometric aberrations, but far worse LCA. Hi Duke, What camera sensor size do you use? Is the corner ...
by Pau
Wed Dec 09, 2020 2:41 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Windows of Papilio ulysses wing scale
Replies: 16
Views: 1823

Re: Windows of Papilio ulysses wing scale

Wow, they are really curved!

Any chance of seeing a 100% crop test?
by Pau
Tue Dec 08, 2020 10:04 am
Forum: Equipment Discussions
Topic: Speccing out a jewelry photography setup
Replies: 6
Views: 917

Re: Speccing out a jewelry photography setup

Just a very wild guess: Because 0.2-1x range is well covered with high quality by many non zoom camera macro lenses and (at least at the higher limit) you'd need to do focus stacking, I can imagine a system with two stepper motors: - one motor moves the camera + lens or subject stage for focusing wi...
by Pau
Sat Dec 05, 2020 11:13 am
Forum: Equipment Discussions
Topic: Setup for the Mitutoyo M Plan Apo 50x / 0.55
Replies: 13
Views: 1202

Re: Setup for the Mitutoyo M Plan Apo 50x / 0.55

Is your Raynox focused to infinite?

If both are used as they should the 50/0.80 will be sharper (and with higher resolution) than the 50/0.55
by Pau
Sat Dec 05, 2020 9:50 am
Forum: Equipment Discussions
Topic: Setup for the Mitutoyo M Plan Apo 50x / 0.55
Replies: 13
Views: 1202

Re: Setup for the Mitutoyo M Plan Apo 50x / 0.55

I tend to agree with Viktor

Few questions:
What's the observed issue? 0.55 is close enough to 0.42 to work fine in the same rig (and it never will be equally sharp at the sensor side)
what's the NA of your Oly?
Are both 50X meant for non glass covered subjects?
Are you able to return the Mitutoyo?
by Pau
Sat Dec 05, 2020 3:53 am
Forum: Equipment Discussions
Topic: Olympus 20x Objective
Replies: 5
Views: 946

Re: Olympus 20x Objective

Hi mgnax, welcome aboard!

I have the non BD version and I'm pretty happy with it

https://www.photomacrography.net/forum/ ... 06#p268906
by Pau
Thu Dec 03, 2020 3:41 am
Forum: Nature Photography -- Macro and Close-up
Topic: Some quick focus stacks of live tiger beetles
Replies: 2
Views: 530

Re: Some quick focus stacks of live tiger beetles

Excellent images, even more when knowing how fast are these animals

At the two first ones, are they fighting or trying to mate?
by Pau
Wed Dec 02, 2020 4:32 am
Forum: Equipment Discussions
Topic: Awakening a Leitz SM microscope
Replies: 22
Views: 2307

Re: Awakening a Leitz SM microscope

... the results and the infinity possibilities of experimentation of the GNU appeal to me even more than oblique lighting. GNU? Gradient Universal Filter is oblique illumination although done in an imaginative and very useful way. Be aware of the oblique, phase, Rheinberg or DF plates must be place...
by Pau
Mon Nov 30, 2020 1:51 am
Forum: Equipment Discussions
Topic: Awakening a Leitz SM microscope
Replies: 22
Views: 2307

Re: Awakening a Leitz SM microscope

I was referring to the dark field condenser, I suspected that it was an oil immersion condenser like Ichty clearly stated. It won't work at all without oil between the top condenser lens and the slide. If it is 1.2 -1.4 model this means that it will work with objectives with NA smaller than 1.2 (alt...
by Pau
Sun Nov 29, 2020 12:31 pm
Forum: Equipment Discussions
Topic: Awakening a Leitz SM microscope
Replies: 22
Views: 2307

Re: Awakening a Leitz SM microscope

Hi Tonikon, welcome aboard! (Ichty was writing at the same time, but he's faster :D ) This is a very nice old microscope with top optics for its time. But it is about 65-70yrs old and, as you can understand, techniques have evolved quite a lot (just compare a 1955 car with a today one... they do bas...
by Pau
Thu Nov 26, 2020 1:23 am
Forum: Equipment Discussions
Topic: Adapting aps-C to nikon: a few different methods
Replies: 9
Views: 2507

Re: Adapting aps-C to nikon: a few different methods

So, fun fact, this actually doesn't work on the smz-10. The nominal 0.6x reduction in the trinoc port means vignetting occurs with a viewing eyepiece combined with a 40mm lens on aps-c. It actually shrinks towards the middle of the zoom range and then reexpands at the end. In the mean time my optip...
by Pau
Wed Nov 25, 2020 2:27 am
Forum: Equipment Exchange
Topic: WTB : Mitutoyo M Plan Apo 20x
Replies: 16
Views: 1714

Re: WTB : Mitutoyo M Plan Apo 20x

Que voulez-vous dire par attention particuliere ? Ol est delicat a utiliser ? Comme lentilles j'ai des Raynox Dcr 150 et 250. Vous avez une idée du prix moyen pour un LMPlanF N 20x Olympus ? I use the Olympus LMPlanFl 20x 0.40 (not the N UIS-2 version but the older UIS) and it is very good, I don't...