Search found 150 matches

by jfiresto
Tue Sep 15, 2020 5:45 pm
Forum: Microscopy accessories
Topic: Add a ring light?
Replies: 10
Views: 250

Re: Add a ring light?

You might ask in the Gem Equipment forum at GemologyOnline.... for sure, I generally work both sites but gemologyonline has considerably less traffic and 95% of my questions end up responded to by Scarodacyl.... It has been a few years since I followed the forum. When you write cold light source I ...
by jfiresto
Mon Sep 14, 2020 6:11 pm
Forum: Microscopy accessories
Topic: Add a ring light?
Replies: 10
Views: 250

Re: Add a ring light?

You might ask in the Gem Equipment forum at GemologyOnline. They are a friendly and helpful bunch and know their microscopes.
by jfiresto
Sun Sep 06, 2020 3:22 pm
Forum: For forum members who want to buy and sell equipment
Topic: Considering upgrade of stereozoom 'scope
Replies: 28
Views: 1177

Re: Considering upgrade of stereozoom 'scope

Good job. A small part of your world has become bright and sharp.
by jfiresto
Sun Sep 06, 2020 7:14 am
Forum: For forum members who want to buy and sell equipment
Topic: Considering upgrade of stereozoom 'scope
Replies: 28
Views: 1177

Re: Considering upgrade of stereozoom 'scope

Just be wary of the oldest, tan models and make sure everything moves easily and smoothly. (I had one for a few days but it was not worth fixing.) The early lubricants that Wild used, dry up and imitate cement.
by jfiresto
Sat Sep 05, 2020 3:45 pm
Forum: For forum members who want to buy and sell equipment
Topic: Considering upgrade of stereozoom 'scope
Replies: 28
Views: 1177

Re: Considering upgrade of stereozoom 'scope

Argghhh.... sounds perfect, the shared path is good presumably for stills where video-logging isn't needed! If you like you could shoot video while viewing through the eyepieces. I mounted the digital camera in place of what, years ago, would have been a video camera with a one-inch vidicon tube. W...
by jfiresto
Sat Sep 05, 2020 3:25 pm
Forum: For forum members who want to buy and sell equipment
Topic: Considering upgrade of stereozoom 'scope
Replies: 28
Views: 1177

Re: Considering upgrade of stereozoom 'scope

Yes, they do seem to have a consistently excellent reputation. I must however have the ability to use both eyepieces AND the camera simultaneously, preferably switchable too. Does yours have this capability? I had to hunt for the right photo tube, but it does now: either split 50:50 between the eye...
by jfiresto
Sat Sep 05, 2020 3:07 pm
Forum: For forum members who want to buy and sell equipment
Topic: Considering upgrade of stereozoom 'scope
Replies: 28
Views: 1177

Re: Considering upgrade of stereozoom 'scope

The old Wild stereo microscopes were made by fastidious Swiss gnomes who built them to match their designs to within a fraction of a wavelength of light and then fastened everything in place for eternity. Or so it seems to me. I have a mongrel example using parts from four different microscopes, or ...
by jfiresto
Fri Sep 04, 2020 8:15 am
Forum: For forum members who want to buy and sell equipment
Topic: Considering upgrade of stereozoom 'scope
Replies: 28
Views: 1177

Re: Considering upgrade of stereozoom 'scope

On my wild m400, when switching from 100/0 to 50/50 the difference in illumination is often completely invisible to the eye, even though the switch is almost instantaneous.... IIRC, the Just Noticeable Difference (Weber fraction) for brightness is ca. 8% so you should notice something, but sometime...
by jfiresto
Thu Sep 03, 2020 7:56 pm
Forum: For forum members who want to buy and sell equipment
Topic: Considering upgrade of stereozoom 'scope
Replies: 28
Views: 1177

Re: Considering upgrade of stereozoom 'scope

... The view through all three ports is very dim compared to the two ports (either configuration) of my old 'scope. So bad is this that I find, with incident-lighting, that I simply don't have enough light to satisfy my needs. This manifests as a huge drop in frame-rate with my ToupView USB CMOS 5m...
by jfiresto
Mon Aug 31, 2020 3:46 pm
Forum: Camera systems and imaging
Topic: Vibration problems
Replies: 48
Views: 1725

Re: Vibration problems

Thank you for that. The G9 shutter can be both fully electronic and electronic at the start. The latter could be the business at low-ish magnifications and for long exposures.
by jfiresto
Mon Aug 31, 2020 11:43 am
Forum: Camera systems and imaging
Topic: Vibration problems
Replies: 48
Views: 1725

Re: Vibration problems

My post was for the wider discussion, not specifically related to 75RR’s difficulties. If my only experience was with Panasonic's older mechanical shutters, for example, with the shutter in the DMC-G6, nothing could stop me from going fully electronic. Perhaps mechanical shutters have been somethin...
by jfiresto
Mon Aug 31, 2020 10:13 am
Forum: Camera systems and imaging
Topic: Vibration problems
Replies: 48
Views: 1725

Re: Vibration problems

I think Olympus has always shown more interest than Panasonic in reducing mechanical shutter shock. Very likely ^^^ I was, however, careful to write: ... ( I love my Lumix G1 ) but that mechanical shutter [*] ... when citing it as an example. If his Olympus is giving the OP grief, my gut tells me a...
by jfiresto
Mon Aug 31, 2020 9:35 am
Forum: Camera systems and imaging
Topic: Vibration problems
Replies: 48
Views: 1725

Re: Vibration problems

... The Micro Four Thirds system is wonderful ( I love my Lumix G1 ) but that mechanical shutter [*], operating in a lightweight body, attached flexibly to a high magnification optical system, is a recipe for disaster.... I think Olympus has always shown more interest than Panasonic in reducing mec...
by jfiresto
Mon Aug 31, 2020 8:12 am
Forum: Camera systems and imaging
Topic: Vibration problems
Replies: 48
Views: 1725

Re: Vibration problems

I found the anti-shock feature of my Olympus E-PL1, the light version of your P2, was surprisingly effective. My camera has the same shutter, so its kick/camera-weight ratio should be even greater. I took 1/10~1s exposures on a stereo microscope at 32X total magnification with a rigid Wild photo tub...
by jfiresto
Wed Aug 26, 2020 8:45 pm
Forum: Beginner's corner
Topic: Microscope for ancient coin restoration: advice needed
Replies: 9
Views: 614

Re: Microscope for ancient coin restoration: advice needed

This site might get you started: https://engraverscafe.com/threads/stereo-microscopes-to-buy-and-to-avoid.3451/ I'm not quite as anti-import scopes as the author (that was written some time ago).... When I asked Absolute Clarity about three years ago, they said the serviceability issues they had ha...
by jfiresto
Mon Aug 24, 2020 7:19 am
Forum: For forum members who want to buy and sell equipment
Topic: Considering upgrade of stereozoom 'scope
Replies: 28
Views: 1177

Re: Considering upgrade of stereozoom 'scope

What's your budget range? There are some good used CMO options but it depends on how much you want to shell out. And perhaps how patient you are. The photo tube you might want for the Wild CMO microscopes is the 180570 with a 50:50 beam splitter. You can buy one today if you are willing to spend en...
by jfiresto
Tue Jul 28, 2020 2:24 pm
Forum: Beginner's corner
Topic: Advice for upright microscope? (Budget 300-800 CHF/USD)
Replies: 16
Views: 1398

Re: Advice for upright microscope? (Budget 300-800 CHF/USD)

... They only sell mail order so even had we been impressed we could not have purchased one to take away which we had wanted to do (I don't trust the mail for delicate items such as microscopes).... So far, DHL and the Post have handled stereo microscopes perhaps better than I deserved: it is getti...
by jfiresto
Sun Jul 05, 2020 10:30 am
Forum: Camera systems and imaging
Topic: Help needed to design adaptor for Mirrorless camera
Replies: 20
Views: 2238

Re: Help needed to design adaptor for Mirrorless camera

Yes, the crux is getting close enough for parfocal, direct projection. The camera flange may need to sit almost 30mm into the original eyepiece tube. Perhaps you could decapitate a tube and make two quick-change adapters: a short one for the camera and a longer one when you want to use the eyepiece.
by jfiresto
Sun Jul 05, 2020 9:00 am
Forum: Camera systems and imaging
Topic: Help needed to design adaptor for Mirrorless camera
Replies: 20
Views: 2238

Re: Help needed to design adaptor for Mirrorless camera

You could: bring the camera closer to the microscope, so that the eyepiece tube intermediate image plane is at the camera's image sensor, and get vignetting introduce a relay lens between the 'scope and camera that expands the image to just cover the APS-C sensor use a different, short flange focal ...
by jfiresto
Tue Jun 16, 2020 10:33 am
Forum: Camera systems and imaging
Topic: battery adapter
Replies: 51
Views: 4419

Re: battery adapter

I think Hans is trying to encourage the OP to check the grounding upstream of his camera (the monitor and 230V wall outlet), as I expect it is now tied into that and because he could not identify the electrical shocks. If a fault develops in his monitor or house wiring, between high voltage and thei...
by jfiresto
Sun Jun 14, 2020 12:41 pm
Forum: Camera systems and imaging
Topic: battery adapter
Replies: 51
Views: 4419

Re: battery adapter

Indeed, but I also would not exclude both static discharges and excessive 230VAC leakage, possibly from poor grounding. This may betray my upbringing, but I think we need to (cautiously) collect more data.
by jfiresto
Sun Jun 14, 2020 11:52 am
Forum: Camera systems and imaging
Topic: battery adapter
Replies: 51
Views: 4419

Re: battery adapter

The metal frames of all my PEN cameras are connected to their signal and power grounds. Presumably your battery eliminator will connect your camera's ground to the monitor's, when you plug it in. That would add more capacitance to take a static discharge. My E-PL1's electrical buttons and dials appe...
by jfiresto
Fri Jun 12, 2020 6:14 pm
Forum: Camera systems and imaging
Topic: battery adapter
Replies: 51
Views: 4419

Re: battery adapter

I use the self timer for that. The camera, when it takes a picture, closes the shutter, rolls it open and then rolls it closed. The first close slams the shutter to its limit and vibrates the camera. If ANTI-SHOCK is on, the camera briefly waits, to let the vibration die away (you can choose how lon...
by jfiresto
Fri Jun 12, 2020 5:37 pm
Forum: Camera systems and imaging
Topic: battery adapter
Replies: 51
Views: 4419

Re: battery adapter

I use a shutter release cable - do you think the anti-shock would be an improvement? It can make a noticeable difference if you happen to choose an unfavorable, intermediate exposure time. My first week with the PL1, I think I discovered all the times that maximally smeared its images. Then I searc...
by jfiresto
Fri Jun 12, 2020 4:13 pm
Forum: Camera systems and imaging
Topic: battery adapter
Replies: 51
Views: 4419

Re: battery adapter

Good job.

Would it be possible to mount the camera to the microscope and have it cast an image directly on to the E-P2's sensor? The PEN cameras have a pretty effective anti-shock setting to avoid shutter shock.
by jfiresto
Fri May 29, 2020 7:32 pm
Forum: Camera systems and imaging
Topic: DSLR AC Adapters affect image quality?
Replies: 5
Views: 688

Re: DSLR AC Adapters affect image quality?

I have a lumix g85 and want an ac adapter so I can record longer without having to change the battery I thought the G85 was mirrorless. I have powered a GH2 and a G6 off 230V AC. I believe both use the same Panasonic DMW-DCC8 DC-coupler (dummy battery) as your G85. If you have any questions, just a...
by jfiresto
Fri May 29, 2020 6:42 am
Forum: Camera systems and imaging
Topic: DSLR AC Adapters affect image quality?
Replies: 5
Views: 688

Re: DSLR AC Adapters affect image quality?

If it is a hum or buzz getting into recorded audio – which is what the reviewers I read, write about – that could be electrical noise from a switching regulator or hum from (we hope are only) small currents leaking through from the AC power. If the adapter is buzzing or humming, that could be a poor...
by jfiresto
Thu May 28, 2020 11:17 am
Forum: Camera systems and imaging
Topic: DSLR AC Adapters affect image quality?
Replies: 5
Views: 688

Re: DSLR AC Adapters affect image quality?

What sort of buzzing do you have in mind? The only I have read about, first reported by Panasonic DMC-GH2 filmmakers, was the recorded sound picking up a buzz from a retrofitted AC adapter. I do not recall any trouble with images, nor have I seen any in my limited (mirrorless) experience.
by jfiresto
Thu May 14, 2020 6:42 am
Forum: Beginner's corner
Topic: What are the practical differences between trinocular light split settings when imaging? (E.g. 100:0 / 20:80)
Replies: 8
Views: 1236

Re: What are the practical differences between trinocular light split settings when imaging? (E.g. 100:0 / 20:80)

Equalizing the brightness of the students' screen image and the teacher's eyepiece image may explain an early Wild stereo microscope photo adapter. It directs 100% of the left optical path to the camera and dims the right path at least fourfold.
by jfiresto
Sun May 10, 2020 7:50 am
Forum: Beginner's corner
Topic: What are the practical differences between trinocular light split settings when imaging? (E.g. 100:0 / 20:80)
Replies: 8
Views: 1236

Re: What are the practical differences between trinocular light split settings when imaging? (E.g. 100:0 / 20:80)

An extra, well-coated, clean :) prism should have a negligible effect if it still in the collimated (infinity) optical path. On the other hand, the partial mirrored coating that splits the light 80:20 or 50:50, may be only be 90% efficient. To put that in perspective, you could get a similar loss by...