Search found 9 matches

by DoppelHans
Sun Dec 16, 2018 11:25 pm
Forum: Equipment Discussions
Topic: precision planetary gearbox, NEMA 17 Voltage: 2.7V
Replies: 29
Views: 7363

with a step angle of 0.36°, it looks quite interesting. It is not a lightweight motor with 0,68 kg! Normally those motors run with 9 to 28 V. Therefore the given voltage of 2,7V is strange. I can't find it in the datasheet again.

Hans
by DoppelHans
Thu Dec 13, 2018 11:07 am
Forum: Equipment Discussions
Topic: Raynox DCR-250 - length of extention tube
Replies: 3
Views: 2665

thank you for your notes, it is a starting point. I know that there is always the option to get approximating values by testing. In this case, I just wanted to get some theoretical background. Meanwhile I found an older post about the DRC-250 (by google, not by the forum search). http://www.photomac...
by DoppelHans
Wed Dec 12, 2018 1:05 pm
Forum: Equipment Discussions
Topic: Raynox DCR-250 - length of extention tube
Replies: 3
Views: 2665

Raynox DCR-250 - length of extention tube

Hello, I would like to construct a tube system for Mitutoyo-Objectives and want to include a Raynox DCR-250 lens as a tube lens. I know that it is not the standard 200mm-lens. I read on a few posts, that the focal length is 125 mm or that the flange-sensor length is 118 mm. Both are not contradictor...
by DoppelHans
Mon Feb 10, 2014 12:55 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Contrast with Canon 1000D
Replies: 6
Views: 1991

Thank you!

I will try to get such material,

Hans
by DoppelHans
Sun Feb 09, 2014 1:03 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Contrast with Canon 1000D
Replies: 6
Views: 1991

Hi Rik and Pau, thanks for your hint. It seems to work. But I'm not able to get it completely black. The tubus itself is made of aluminium eloxated in black. But this was not enough. I tried black paper or black textile. But I cannot remove the reflections completely. What can I put inside of the tu...
by DoppelHans
Sun Feb 09, 2014 8:06 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Software to control macro photography, projects, 3D-360º
Replies: 10
Views: 7693

Thanks,

but I got an error durring the installation process.

Image


Hans
by DoppelHans
Sun Feb 09, 2014 4:21 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Software to control macro photography, projects, 3D-360º
Replies: 10
Views: 7693

Dear Oscar,

I would like to test your software Macrofotografia which you have shown in your youtube video.

Can you provide it to me for testing?

How do you control the stepper motor. Is it based on Trinamic Motion Control Languange (TMCL) or the simpler version TMC?

Thanks, Hans
by DoppelHans
Sat Feb 08, 2014 12:50 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Contrast with Canon 1000D
Replies: 6
Views: 1991

Hi Rik,

thanks for activating BBC!


Yes, the scale should be b/w.

And yes, there is an extention tube, in which the tube lens is mounted. And this is shining light. The bellow it self is black.

I will put some black paper or so in it and test it.

Thanks, Hans
by DoppelHans
Sat Feb 08, 2014 11:39 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Contrast with Canon 1000D
Replies: 6
Views: 1991

Contrast with Canon 1000D

Hello, after reading posts of this forum for a long I have an own question. I built up a photo system with - some Mitutoyo objectives (2x, 5x, 20x), - a tube lens (chinese achromat lens, f=200m) - mounted on a bellow and - as a camera a Canon 1000D or a Tuptec 14MP-microscope camera - as illuminatio...