Search found 127 matches

by genera
Fri Nov 10, 2017 6:39 pm
Forum: Equipment Discussions
Topic: Nikon Optiphot stage issue
Replies: 14
Views: 1880

How many microns focus difference are there between top edge and bottom through the eyepieces? Use the markings on the fine knob to measure This is a very important question. Even on new microscopes, unless the stage has leveling adjustments, some degree of tilt should be expected. If it's only a c...
by genera
Thu Nov 09, 2017 2:26 am
Forum: Equipment Discussions
Topic: Mitutoyo 10x 0.28 - damaged?
Replies: 25
Views: 3103

This is a pretty well known problem with camera lenses coming in from the cold. The recommended procedure is to seal the lenses and bodies in a baggie or other airtight container until the equipment temperature has reached room temperature.
by genera
Tue Oct 17, 2017 8:45 am
Forum: Equipment Discussions
Topic: Counterweights for heavy lenses on vertical rails?
Replies: 23
Views: 4630

. . . With a counterweight that uses mass (literally, one weight used to oppose another), the moving parts end up weighing twice the mass of the lens, camera and moving stage, and the resulting increase in inertia can be a problem for the motor and other mechanical parts. It helps a little that you...
by genera
Mon Oct 16, 2017 10:52 am
Forum: Equipment Discussions
Topic: Counterweights for heavy lenses on vertical rails?
Replies: 23
Views: 4630

Re: Counterweights for heavy lenses on vertical rails?

I have some very heavy lenses, some more than 10 kg. This is far above the rated vertical capacities of most motorized rails. One idea I've had is to use a counterweight to balance the weight of the lens, like elevators use. Has anyone tried this? Any advice? I have a Nikon MM40 stand that uses a l...
by genera
Sat Oct 07, 2017 8:00 pm
Forum: Beginners Macro
Topic: newport 423
Replies: 4
Views: 3632

Maybe an Arca clamp on the tripod head and a compatible plate on the Newport stage. Something like this on the tripod head: http://www.ebay.com/itm/Desmond-DAC-04-Dual-Channel-Arca-Slidefix-Compatible-50mm-Clamp-QR-3-8-w-1-4-/162692594736?hash=item25e13bfc30:g:m0IAAOSwPfZZz~dk and then a rail/plate ...
by genera
Fri Oct 06, 2017 12:15 pm
Forum: Equipment Discussions
Topic: rotary stage for 360 degree-photography
Replies: 8
Views: 2385

Would there be any advantage over a stage that has a fine-focus knob for a few degrees, compared to this novoflex panorama plate? Only you can answer that question. If you're trying to move in evenly spaced intervals the Newport stage is marked every degree the Novoflex every 10 degrees. If you're ...
by genera
Fri Oct 06, 2017 6:43 am
Forum: Equipment Discussions
Topic: rotary stage for 360 degree-photography
Replies: 8
Views: 2385

I think this one will do what you want: http://www.ebay.com/itm/KLINGER-MICRO-CONTROLE-NEWPORT-PRECISION-ROTARY-THETA-STAGE-w-MIC-4-3-X4-3-/253173016852?hash=item3af249a914:g:ROQAAOSwmLlX8G3a But I'd advise against a stage with only high precision positioning, unless it's motorized. 180 degrees at 1...
by genera
Fri Aug 25, 2017 12:21 pm
Forum: Equipment Discussions
Topic: Mystery knob on goniometer
Replies: 7
Views: 1354

johan wrote:Could it 'lock' it - ie "fasten" it so no movement possible? Seems odd to block the attachment hole underneath
The attachment hole is blocked to the same extent (though I think of it as somewhat restricted) no matter what the function of the screw is. Why not "lock" as one of the possible uses?
by genera
Fri Aug 25, 2017 12:13 pm
Forum: Equipment Discussions
Topic: Mystery knob on goniometer
Replies: 7
Views: 1354

Do you have a photo of the other side showing the scale ? Given the 31mm height shown in one of your photos you have either the model 07GOH106 (with #8-32 inch threads) or the 07GOH506 (M4 metric treads). In either case the usable range is specified as +/- 20 degrees. It looks like you've positioned...
by genera
Fri Aug 25, 2017 9:17 am
Forum: Equipment Discussions
Topic: Mystery knob on goniometer
Replies: 7
Views: 1354

According to the catalog: "A thumbscrew on the side may be used to lock the stage". It seems that your goniometers have been modified.
by genera
Wed Aug 09, 2017 9:42 am
Forum: Equipment Discussions
Topic: Any Zeiss Photomicroscope experts out there (?)
Replies: 8
Views: 2201

I can't tell for sure but it looks like the plunger has two different faces on the dovetail side. Have you tried rotating it 180 degrees?
by genera
Wed Jul 19, 2017 5:45 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: 300MM F/4E PF + 17E II TC, 1:2 RESOLVING POWER AT 4 FT
Replies: 2
Views: 1100

Leon, There's a standardized way of calling out areas of the resolution target that make it unnecessary for you to define areas yourself and enable others, even without your instructions, to know the area you're referring to. The convention is to break the markings into groups of 6 line pairs, aka e...
by genera
Wed Jul 19, 2017 4:34 pm
Forum: Beginners Macro
Topic: Questions on beginner software for small stacks.
Replies: 28
Views: 9742

. . . The reason I haven't got Helicon is that you really need to buy the Pro version (to get retouching capabilities) and you have to pay again every year :evil:. (That may have changed?). ZS is a one-off payment. Albeit some of the features Helicon has, are rather nice and absent from ZS. It must...
by genera
Sat May 20, 2017 12:49 am
Forum: Equipment Exchange
Topic: Nikon PSM 4a to Microphot FXA control cable
Replies: 7
Views: 2159

I can't help with an assembled cable but here's a data sheet from HRS/Hirose for the connector series in case you get desperate enough to make your own: http://www.mouser.com/ds/2/185/1600_catalog-938908.pdf
by genera
Tue Apr 04, 2017 1:49 pm
Forum: Equipment Discussions
Topic: Setting up my PZO (for those in the know)
Replies: 123
Views: 27622

The Fluke is set up right for DC volts. Have you tried AC ~ ?