Rik, Do you have some special version of Stackshot with smaller minimum step length? The standard version of Stackshot, as far as I knows, can only do as fine as 10µm steps (accomplished by 1/16 microsteps). My calculation for the combination of your NA 0.5 40x objective and camera, indicate a maxim...

Here come a few more pictures for the +5 and EF 100mm USM Macro lens. I have printed a better test pattern on a good quality Archival Matte paper with my Epson printer. First, an image with the same setup as my last picture, but using the new target. +5 Achr. directly on Canon 100mm USM macro At 1x ...

If you slack off on the Canon's magnification setting in an attempt to restore 1:1 magnification, then the entrance pupil will move forward and the combo will be less telecentric. This is what I expected and found while testing, but I chose to just publish the most telecentric picture. It could be ...

I would like to add a picture of a picture from the combination of the Canon 100mm Macro USM with a +5 achromat. I just got such a diopter lens and had to do a quick and dirty test photo of my mm-grided cutting mat. http://www.photomacrography.net/forum/userpix/1184_5_Achromat_on_Canon_100mm_USM_mac...

Hi, Pau, I do not agree with the second part of "direct sunlight isn't polarized, and because specular reflection doesn't polarize it, a single polarizer has no effect cutting off this reflections." Most if not all specular reflections do polarize the light to some degree. The ammount of polarisatio...

When building such a contraption, to avoid parallax problems, it is important to make the mount of the camera flexible enough to make it possible to place the no parallax point of the optics in the rotation center. Rik wrote an excellent article about this a few years ago: http://www.janrik.net/Pano...

Hi Chris, Thank you for looking! I hope for confirmation that I have made this correctly, but I tend to make mistakes and those are difficult to find by myself. I'm glad to see that non MS programs handle those files OK! The e-factor is something I found in a calculator by one of the member in this ...

Hi everybody, DOF and suitable step length for stacking have been discussed repeatedly here. I have found a way that works for me and would like to share it. My stacking setup is not close by my computer, and I find it practical to use tabulated data on a few sheets of paper. I select suitable optic...

Hi, I think these materials are a bit heat sensitive as they use a plastic base. If the light sources are too hot the can degrade and melt. I remember an experiment I made a long time ago, putting a camera Pol-filter in front of my projector. That filter isn't good anymore. It is a Hoya filter with ...

Hi Bob, It is a small world, indeed! We might have met, but I do not remember as my memory for names and persons is terrible. I'm sorry. I have worked for both companies. CDP 1885-1988 and AD from 1989 until last year. At AD, in the beginning I was one of the two engineers in the company. We were th...

Hi Cozdas, I have experience with the problem that the manual is warning for. :oops: ( Note to myself: always read the manuals and remeber everything! ) There is a real risk to fire the flash many times in quick succession. It might kill your flash! To be on the safe side, Canon is describing the wo...

Hi, I am in process of building a collection of tools for photography using microscope objectives. A few months ago I found a conical adapter for the RMS thread sold by a person in China and bought it. The adapter was quite OK considering the price, but needed some internal flocking to cut the refle...

Hi, As I finally have come around to become a member in this excellent group, I'd like to present myself. I live in the southern of Sweden in Malmö, close to the Danish capital Copenhagen My profession is engineering in electronics and mechanical design. Mostly I have been working with designing har...