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, ...

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.

... 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...

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 ...

Wow, they are really curved!

Any chance of seeing a 100% crop test?

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...

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

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?

Hi mgnax, welcome aboard!

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

https://www.photomacrography.net/forum/ ... 06#p268906

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

At the two first ones, are they fighting or trying to mate?

... 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...

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...

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...

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...

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...