Search found 64 matches

by JGVilla
Tue May 19, 2015 1:37 pm
Forum: Equipment Discussions
Topic: Automating and characterizing an Olympus CHT focus block
Replies: 20
Views: 10854

Thank you for all this very valuable and useful practical information. =D> The following links give a good theoretical background of most factors involved in timing belts and timing pulleys. You guys are probably familiar with these documents, but for anybody trying to get a hang of it, these docume...
by JGVilla
Sun Apr 26, 2015 12:11 pm
Forum: Equipment Discussions
Topic: Motorizing (“Bratcamming”) a focus block or microscope
Replies: 11
Views: 8546

Hallo ChrisR Figure 41: It must be tempting to fix the microscope and the Stackshot to the same vertical extrusion? If you mean something like this: http://www.photomacrography.net/forum/userpix/416_Update_024_1.jpg Yes it can be easily done, but what would be the advantage versus the focusing block...
by JGVilla
Sun Apr 26, 2015 9:04 am
Forum: Equipment Discussions
Topic: Motorizing (“Bratcamming”) a focus block or microscope
Replies: 11
Views: 8546

Update

Update From just below figure 34 in part 3 above: The 'head' of the microscope is contributing to the stability as it rests (via a leftover 20x20 profile) on the base plate. For extreme stability it could even be fastened with a bolt and a big washer to a QR clamp on the base plate. As an experimen...
by JGVilla
Fri Apr 10, 2015 6:31 am
Forum: Equipment Discussions
Topic: Motorizing (“Bratcamming”) a focus block or microscope
Replies: 11
Views: 8546

part 3 of 3 - Making an universal stage

part 3 of 3 - Making a Universal Stage The previous part ended with a paragraph about alternative connections bolts. Working with both set-ups (regular L-bracket and alternative bolts) I came to the conclusion that I prefer the regular L-bracket. It is easier to install and does not require so much...
by JGVilla
Fri Apr 03, 2015 9:43 am
Forum: Equipment Discussions
Topic: Motorizing (“Bratcamming”) a focus block or microscope
Replies: 11
Views: 8546

part 2 of 3 - Motorizing a microscope

part 2 of 3 - Motorizing a microscope A picture of the “converted” microscope has already been published in part 1 (picture 10). In this part I will use the side car construction which has been presented in the previous part. Scrutinizing the picture below you may notice the following differences w...
by JGVilla
Mon Mar 30, 2015 12:58 pm
Forum: Equipment Discussions
Topic: Motorizing (“Bratcamming”) a focus block or microscope
Replies: 11
Views: 8546

Motorizing (“Bratcamming”) a focus block or microscope

Introduction Last year I started considering the possibilities of using a stepper motor with my focus block. I found especially the “electric-bradcam” project presented by Chris S. very appealing (see here) . I carefully studied all his information and - being totally new to “robotics” - I did some...
by JGVilla
Wed Mar 25, 2015 1:27 pm
Forum: Equipment Discussions
Topic: Harvesting and adapting an Olympus CHT focus block
Replies: 8
Views: 4579

Hallo Chris R & S, That would be perfectly OK with me. Actually I'm ready to publish. Point is, publishing takes -now- much more time than "bradcamming" a microscope (block). My microscope block is ready and in the (mechanical) testing phase. Right now I'm also bradcamming my Olympus CHC micrsocope....
by JGVilla
Sun Mar 22, 2015 2:35 pm
Forum: Equipment Discussions
Topic: Harvesting and adapting an Olympus CHT focus block
Replies: 8
Views: 4579

Hallo Rik, I haven't been active for a long on the photomacrography.net. At the end of last year I started thinking of "bratcamming" my focusing block (still going strong). At the moment the focusing block is at my manufacturer but I will try to stop that program, because I found a way how anybody w...
by JGVilla
Tue Feb 24, 2015 12:45 pm
Forum: Equipment Discussions
Topic: Info re. the Nikon BE Plan Achromat 20X 0.40
Replies: 3
Views: 1008

Chris, Thank you for your reply re. the Nikon 20x lens. For the time being I will concentrate on my 10x lenses. Regarding my motorized Olympus CHC block (the one Rik referred to in his post about harvesting a microscope block), test runs so far look very promising. Best resolution observed was about...
by JGVilla
Mon Feb 23, 2015 3:34 pm
Forum: Equipment Discussions
Topic: Info re. the Nikon BE Plan Achromat 20X 0.40
Replies: 3
Views: 1008

Info re. the Nikon BE Plan Achromat 20X 0.40

Hi, I haven't been active on this net for a long time but finally I have more time to re-activate my photomacrography hobby. First actions: bought a Stackshot system and I'm motorizing my Olympus CHC focusing block. Prototype is finished but I have to wait for some small components before I can have...
by JGVilla
Mon Feb 23, 2015 3:15 pm
Forum: Equipment Discussions
Topic: Any feedback available about the BE Plan Achromat 20x
Replies: 0
Views: 245

Any feedback available about the BE Plan Achromat 20x

Hallo, I haven't been active on this site for a long time but recently I found time to re-activate my photomacrography hobby. First action: I finally bought a Stackshot system and I'm also working on motorizing my Olympus CHC focusing block with a Congnisys stepper motor. Prototype is finished but I...
by JGVilla
Mon Feb 23, 2015 3:10 pm
Forum: Equipment Discussions
Topic: Any feedback available about the BE Plan Achromat 20x
Replies: 0
Views: 292

Any feedback available about the BE Plan Achromat 20x

Hallo Everyone, I haven't been active on this site for a long time but recently I found more time to re-activate my photomacrography hobby. First action: I finally bought a Stackshot system and I'm also working on motorizing my Olympus CHC focusing block with a Congnisys stepper motor. Prototype is ...
by JGVilla
Tue Jun 30, 2009 2:41 am
Forum: Equipment Discussions
Topic: Canon MPE65 on a Nikon Body?
Replies: 21
Views: 5700

I'm having a very hard time finding an adapter that goes from an M42 body to a standard Nikon F-mount lens. Does such an adapter exist? Its easy to find the reverse (to fit a Nikon body to an M42 lens)... Any help very much appreciated... Yes, they do exist. Have a look here: http://cgi.ebay.com/Ni...
by JGVilla
Sun Jun 14, 2009 3:10 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Light diffuser comparison - tube vs flash
Replies: 30
Views: 14426

Feel free to post yogurt pots (unless you are just gloating over the perfect fit on your extension tube :evil: ) OK, so I forgot all the hard to get adapters and designed something from scratch that in fact works quite well: http://www.photomacrography.net/forum/userpix/416_DD_01_1.jpg As I just de...
by JGVilla
Sat May 30, 2009 11:56 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Diptera ...
Replies: 3
Views: 1170

I like the background for this picture much better than the previous one.
Details of the subject come out very nicely.
There are better (sharper) El Nikkors, but the 4/75 does not come out all that bad here (as far as I can see just from this picture).