MicrobeHunter.com Microscopy Forum

Damping grease

The review didn't cover MFT cameras, but MFT is still a large sensor compared to most of the USB/C-mount cameras, and I would expect it to produce good results, similar to APS-C cameras.... I can not argue with that. MFT can also be quite light, the ones I have been using are less than 350g with du...

I remember tape recorders back then often had a remote control input that let you stop and start the machine for taking dictation, with a subminature jack on the recorder and a switch on the microphone or in a foot pedal. Some microcomputers used that input to throttle playback while loading program...

As you can attest, there is more to getting good images than just the camera. Define "best", for whom, what and with what, and I am sure you will get some suggestions.

EDIT: Let me add that the camera is really what is letting me down ... because the workflow I setup is too complicated. I have made myself a Linux system administrator of my microscope camera and that feels like work: ssh, raspivid, scp, ffmpeg, etc. I'm looking forward to streamlining this and doi...

Scarodactyl wrote: ↑

Mon Feb 21, 2022 4:11 pm

The diameter of a m4/3 sensor is 22.5mm, so it is theoretically possible for the c mount to cause a little vignetting. It may depend on the adapter.

I think we will get lucky (I bought a GX85 for video as well). The crop factor reduces the camera's video diagonal to 22.5 / 2.2 * 2 = 20.5 mm.

Also, how is the field of view on the 1" compared with the 4/3"? I would like to avoid excessive cropping on my viewport. Better a little vignetting in a video than to entirely miss the area I that I am manipulating.... The GX80/GX85 has a 2.2 crop factor (w.r.t. 35mm full frame) when shooting vide...

You can also save money if you need live video. If you deduct $200 for the two bundled kit lenses, a new GX85, which outputs clean, continuous, 4K HDMI video, was less than $300+tax when it was being closed out about three years ago. (I am just getting started with one which is why I did not mention...

I agree. You can save money with a mirrorless camera, especially if you do not need live video. I am looking at under $200 to add an E-PL7 (an Olympus demo unit, 3000 shutter cycles with a two year, camera store guarantee) to my father's SMZ-2T.

Paraformaldehyde generating gaseous formaldehyde is a classic for sterilizing operating microscopes. This PDF is a more recent reference and attached is an earlier one.

... According to the specs of your microscope you have a trinocular mount with 23mm c-mount photoport. In this case the easiest (and rather economic) solution might be to mount a consumer mft-camera (e.g. Panasonic or Olympus) which provides an HDMI-port. There are cheap mft-to-c-mount adapters (<2...

... I like halogens. Control with a PWM doesn’t have the flicker issues like LEDs.... It can if the PWM frequency is too low (e.g., 100/120hz) and you choose an unfortunate exposure time when taking stills or shooting video. To avoid flicker, the Schott 150W halogen light source next to me, rectifi...

I reckon they are more toward 0.5mm^2 (20AWG), the limit of what some cage clamp connectors will accept. Probably midway or 22AWG. The DC connectors also have a current limit. The first five I looked at have a 1A or 2A rating. Well, now that you have got me whipped into a researching frenzy, from su...

Did either vendor give a maximum rating for their pigtailed power connectors? I looked again at the specs for some 5.5/2.1mm male-female extension cables I bought in 2020 to power a couple mirrorless cameras. Translated they read: "recommended for up to 36VDC and 3A maximum load or less". A camera w...

I will tap the 24½mm (bottom) end to accept an M8x16 DIN 653 flat knurled screw, which will stop a microscope head from sliding down and off the post.

The 20mm post was a drag.... I consider that better than the 24½mm post on the Nikon SMZ-2T. What is with that? Oof yeah, they still use that on their industrial scopes, and kyowa copied it(?) so I currently need two 24.5mm posts and seem to be short on options for them.... I hope to machine some 2...

Scarodactyl wrote: ↑

Wed Dec 22, 2021 7:13 pm

The 20mm post was a drag....

I consider that better than the 24½mm post on the Nikon SMZ-2T. What is with that?

The changes I can think of right now are: a 25mm rather than 20mm shaft standard, diopter adjustments on the eyepieces instead of the eyepiece tubes, a much lighter but still metal housing, interchangeable rack and pinion units rather than hand matched pairs, and original heavy damping grease that d...

... Would you know if the M7 has the same relatively plan objective design as the M7A? It sure looks like it. The parts catalog drawing for the M7 objective shows two part numbers for each of the four lens elements: M7_objective.gif The M7A objective drawing only shows the second part numbers which...

I am pretty sure the M7A is only semi-plan which is plan enough for me. The M7A/M7S brochure shows a modified identical plano convex pair to minimize spherical aberration: wild_m7a_objective.jpg You notice the objective's added flatness when you use an auxiliary lens, and am I starting to suspect, a...

This is getting silly. I finally had a chance to try the above D10NLC and Quenox adapter combination, I wrote about earlier, with a micro four thirds camera. Specifically, I tried the following stackup: A Wild M7S in macroscope mode A Wild 180570 photo tube A D10NLC, ISO 38 to c-mount adapter A Quen...

Hi Michel. I am still trying to understand how the 38mm ISO port -> T2, T2 -> µ4/3rds pair is supposed to work. A T-mount is supposed to have a 55mm flange focal distance. If I make no mistake, the first adapter will need a relay lens because the ISO port has 26mm shorter focal distance. Would a goo...

I found another micro four thirds to c-mount adapter that fully spins on to a D10NLC 38mm ISO camera port adapter, the Quenox C-m4/3: quenox C-m4_3 adapter.jpg Its two 1.5–1.6mm steps at r=18.9 and r=20mm are both crucial: deleting either – which thankfully Quenox did not do – would save money but a...

... Apochronaut has commented on such ridiculous specifications a while ago, say " bright, clear images through the optics " or similar. A few months back, I closely criticized the fluffy specifications for an Amscope microscope. The following week, the specs had shrunk by almost half and become ne...

While 25X is pushing it, a pair of 20X eyepieces are handy with the Wild M7 models. They effectively double the zoom range, split into two overlapping, lower and higher ranges. With the M7's 0.07 NA and limited, 3.1X maximum zoom, empty magnification should start with ca. 1000 * 0.07 / 3.1 = 23X eye...

... A single single diode would still leave 5 - 0.6 = 4.4v at the LM317, allowing a "hefty" 1.4v above the target 3.0v.... A 5V DC supply might have a ±5% output voltage tolerance and if, IIRC, an LM317 can have a fairly high dropout voltage, up to perhaps 2–3V under load. The LM317 just might, a l...

I think the microscopy gods have been smiling on me and perhaps making things a little easier than I deserve. I found another c-mount to micro four thirds adapter than will not fully screw on to the Diagnostic Instruments D10NLC, the Fotodiox C-MFT . Its problem is that the wall that rings the c-mou...

It is probably easiest to mount your GX80 on your 38mm photo tube. What is Wild photo tube part number? To mount the camera, you will need two items. First, a 1X (optic-less) ISO 38mm to c-mount adapter. My favorite is the Leitz 543345 , which Wild also sold under their name and own part number. The...

Very interested by your setup with a Wild photo tube, could you give some more details about your black adapter and its dimensions above the tube, please?... I would be happy to do that, but might it be good to start a new, more Wild-specific thread? In your new thread, you could give as background...

Moving the eyepiece out of position to change the size of the image will have an effect on the image.... As in, degrade the image / add aberrations? Here's the only decent test of this that I can thing of: https://www.krebsmicro.com/NFK_lowermag/index.html Not the same eyepiece, but the principle i...