Search found 3078 matches

by Chris S.
Wed May 18, 2022 9:51 pm
Forum: Equipment Discussions
Topic: Edmund Optics article on Reflective Objectives
Replies: 6
Views: 59

Re: Edmund Optics article on Reflective Objectives

I expect there are integrated systems that come with these objectives already installed. What are some examples of those? I think I have such an objective. If so, it came on a derelict Biorad UMA 300 FTIR microscope that I bought for its opto-mechanical components. It's doubtful I'll ever experimen...
by Chris S.
Sun May 15, 2022 11:18 pm
Forum: Equipment Discussions
Topic: DIY Hotshoe interface
Replies: 1
Views: 172

Re: DIY Hotshoe interface

Keith, Thanks for sharing this, as well as your other recent posts. During the past few days, I've looked to see if there exist hot shoe adapters with terminal blocks for wiring. So far, I haven't seen any. (Though there are hot shoe adapters with PC outlets; these would work, but would likely be fi...
by Chris S.
Fri May 13, 2022 11:06 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: How to control a LED panel with a Stackshot Controller
Replies: 11
Views: 544

Re: How to control a LED panel with a Stackshot Controller

This is a link on Amazon to the programmable relay module I used. The price has dropped by a few dollars since I last purchased one. I purchased several and also use them as intervalometers in time lapse and to regulate watering of terrariums. https://www.amazon.com/UCTRONICS-Programmable-Multifunc...
by Chris S.
Wed May 11, 2022 10:18 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: How to control a LED panel with a Stackshot Controller
Replies: 11
Views: 544

Re: How to control a LED panel with a Stackshot Controller

Keith, thanks for both posts. I've long been meaning to switch from continuous halogen to gated LED COBs, but have put it off. My thought was to intercept the signal from the StackShot's trigger cable, program a delay using an Arduino, then have the Arduino trigger a relay to keep the LED COBs on fo...
by Chris S.
Fri May 06, 2022 11:21 pm
Forum: Equipment Discussions
Topic: Mitutoyo objective clones
Replies: 14
Views: 605

Re: Mitutoyo objective clones

Alrighty, I'll go off high alert since I already have the other mags covered, but this should be great news for the community. I didn't mean to cause a splash in terante1981's thread (sorry!) The lens I tested seems a bit better than my Mitutoyo of same magnification and NA (which has been tested a...
by Chris S.
Fri May 06, 2022 3:59 pm
Forum: Equipment Discussions
Topic: Mitutoyo objective clones
Replies: 14
Views: 605

Re: Mitutoyo objective clones

Scarodactyl wrote:
Fri May 06, 2022 2:48 pm
The big question is which magnification it might be (could it be the 50x/0.65???)
Not that one, yet.
by Chris S.
Fri May 06, 2022 2:42 pm
Forum: Equipment Discussions
Topic: Mitutoyo objective clones
Replies: 14
Views: 605

Re: Mitutoyo objective clones

RobertOToole wrote:
Fri May 06, 2022 2:19 pm
That's not fair Chris, not even a sneak peek?
PM'd. :D
by Chris S.
Thu May 05, 2022 10:48 pm
Forum: Equipment Discussions
Topic: Mitutoyo objective clones
Replies: 14
Views: 605

Re: Mitutoyo objective clones

terante1981, welcome to posting! :D I doubt it's at all easy to build a Mitutoyo clone. I've in the past tested some such lenses from one company, and they were horrible. On the other hand, I've recently been testing a lens from the company in your link, and will soon be posting on its superb result...
by Chris S.
Fri Apr 29, 2022 11:08 pm
Forum: Equipment Discussions
Topic: Objective Vial for Nikon BD Plan 26mm x 0.75mm
Replies: 8
Views: 357

Re: Objective Vial for Nikon BD Plan 26mm x 0.75mm

Brad, Thanks for your thorough report! I did not know about the Thorlabs objective cases. I'm sure they're very well made, but not sure what the use case is for a high-class objective vial at a higher price, when a cheaper one does the job well. Perhaps the mass of the brass bass lets one screw it o...
by Chris S.
Thu Apr 14, 2022 12:16 am
Forum: Equipment Discussions
Topic: Objective Vial for Nikon BD Plan 26mm x 0.75mm
Replies: 8
Views: 357

Re: Objective Vial for Nikon BD Plan 26mm x 0.75mm

Brad, I held off on responding, as I don't have specific experience using aftermarket objective vials designed for Mitutoyo M26 X 0.706 lenses with Nikon M26 X0.75 objectives. This said, I agree with Scarodactyl--these lens vials will probably will work well with the similar--though not identical--N...
by Chris S.
Wed Apr 06, 2022 10:29 pm
Forum: Equipment Discussions
Topic: Excellent Report on the Vivitar/Tokina 90mm f/2.5 Macro Lens Series!
Replies: 10
Views: 545

Re: Excellent Report on the Vivitar/Tokina 90mm f/2.5 Macro Lens Series!

I owned the Tokina 2.5/90 for sometime but eventually sold it #-o Me, too. The Tokina 2.5/90 was my first "macro lens." I chose it because it was reviewed as a very good standard macro lens, and much cheaper than a micro-Nikkor. I loved it! So much easier, with a far higher hit rate, when shooting ...
by Chris S.
Tue Apr 05, 2022 12:20 pm
Forum: Equipment Exchange
Topic: looking for a non functionnal Olympus SZH body
Replies: 17
Views: 965

Re: looking for a non functionnal Olympus SZH body

If it is this one, eBay item number 134075966361, the "Buy it now" price is $225 USD, with $13.05 USD shipping to my location in Ohio, USA. There is also a "make offer" button available. There seems to be shipping available to France, as well, but without a postal code, I couldn't look it up. For_PM...
by Chris S.
Fri Apr 01, 2022 10:18 pm
Forum: Equipment Discussions
Topic: DIY-Macro-Rail: step size?
Replies: 8
Views: 613

Re: DIY-Macro-Rail: step size?

This seems overly optimistic to me. 0.5 microns is roughly 0.00002 inches, which is something like 10X smaller than anything I've run across in low end indicators. You're right, Rik. I should not attempt imperial-to-metric conversions while tired--misplaced a decimal point. For the record, the indi...
by Chris S.
Fri Apr 01, 2022 12:39 am
Forum: Equipment Discussions
Topic: DIY-Macro-Rail: step size?
Replies: 8
Views: 613

Re: DIY-Macro-Rail: step size?

Do you have a digital gauge indicator? That is far better than any numbers crunching. Good idea, Macro_Cosmos! Decent low-end digital gauge indicators don't cost much, but should be capable of measuring a screw-drive's smallest repeatable increments quickly and conveniently. I've been meaning to pi...
by Chris S.
Thu Mar 31, 2022 11:58 am
Forum: Equipment Discussions
Topic: DIY-Macro-Rail: step size?
Replies: 8
Views: 613

Re: DIY-Macro-Rail: step size?

Daniel, For the Z-axis, the answer partly depends on the highest numerical aperture (NA) you envision using on your rig. As you likely know, depth of field goes down as NA goes up. With smaller DOF, you want finer steps. Here are the default step increments I use at various numerical apertures: 5x/0...