Search found 131 matches

by jfiresto
Tue Jun 16, 2020 10:33 am
Forum: Camera systems and imaging
Topic: battery adapter
Replies: 51
Views: 2223

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: 2223

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: 2223

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: 2223

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: 2223

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: 2223

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: 275

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: 275

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: 275

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: 931

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: 931

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...
by jfiresto
Sun May 03, 2020 9:50 am
Forum: Camera systems and imaging
Topic: battery adapter
Replies: 51
Views: 2223

Re: battery adapter

See what you mean. That does look more dependable than a usb plug, easy to run out of usb sockets as well, something to think about. I also think about electrical safety, although this should not be a problem if you power your adapter from a computer or USB hub from an established maker. I and my k...
by jfiresto
Sat May 02, 2020 7:56 pm
Forum: Camera systems and imaging
Topic: battery adapter
Replies: 51
Views: 2223

Re: battery adapter

I run my Olympia E-PLx cameras off a 7.5VDC power supply. Shop bought or jury-rigged? Store bought, this Mean Well GSM25B07 . I prefer two-pin plug, table top power supplies that do not clutter electrical outlets, and do not mind spending a few more euros to get a high reliability, medical grade po...
by jfiresto
Sat May 02, 2020 7:20 pm
Forum: Camera systems and imaging
Topic: battery adapter
Replies: 51
Views: 2223

Re: battery adapter

Should you need an alternative, I can track down the one I bought from China about a year ago.

I run my Olympus E-PLx cameras off a 7.5VDC power supply. Panasonic µ4/3rds cameras are more finicky.
by jfiresto
Tue Apr 28, 2020 8:17 am
Forum: Beginner's corner
Topic: Reliable Dealers
Replies: 4
Views: 741

Re: Reliable Dealers

Wes wrote:
Tue Apr 28, 2020 6:53 am
Thilo Immel Optics at Göttingen is a reliable dealership. A bit more expensive but they know what they are doing and you are in good hands with Thilo Immel.
I quite agree. They will take care of you.
by jfiresto
Fri Apr 17, 2020 7:10 am
Forum: Camera systems and imaging
Topic: What DSLR settings do you use?
Replies: 5
Views: 484

Re: What DSLR settings do you use?

If you have not already, check out using the self timer with mirror lock up. See "Mirror Lockup to Reduce Camera Shake" in the Eos Rebel T4i instruction manual, p. 140.
by jfiresto
Mon Apr 13, 2020 4:26 pm
Forum: Introduce yourself
Topic: Adding / requiring member locations?
Replies: 15
Views: 1110

Re: Adding / requiring member locations?

... One would think that the internet would be similar [to Amateur Radio/Ham Radio] but it seems to have created a place that is colder and increasingly impersonal. This is probably due in part to all of society going online - the good, the bad and the ugly.... It certainly used to be much more col...
by jfiresto
Mon Apr 13, 2020 8:51 am
Forum: Camera systems and imaging
Topic: Top Tier vs Mid Range DSLR Cameras
Replies: 7
Views: 563

Re: Top Tier vs Mid Range DSLR Cameras

I do not know the microscope this is for, but I suspect investing more in a "prime lens" and less in the camera body will win you much better images. The micro four thirds Panasonic G85 is already more than good enough to make the microscope and the photo adapter the limiting factors – if you are no...
by jfiresto
Sat Apr 04, 2020 4:31 pm
Forum: For forum members who want to buy and sell equipment
Topic: Stereomicroscope Help
Replies: 10
Views: 738

Re: Stereomicroscope Help

Should you begin to fancy a Wild stereo, I have three different ones (M5A, M7S and a M8) that I am going to sell anyways :) Plus I would have the heavy-duty, top quality Wild long arm boom stand to go with the scope.... Very nice. That makes three flavors of achromat, and the giant-killer stand, or...
by jfiresto
Mon Mar 30, 2020 8:20 am
Forum: My microscope
Topic: My dream frankenscope, nearly complete!
Replies: 5
Views: 789

Re: My dream frankenscope, nearly complete!

I like it: Dr. S. Frankenstein's microscope. What is next? Carbon arc illumination? With that you could see through anthracite, get a tan and Vitamin D, vaporize insects, sterilize any lens fungi that dare to enter the lab and, last but not least, promote the research by silencing any nattering cell...
by jfiresto
Fri Mar 27, 2020 2:59 pm
Forum: Microscopes and optics
Topic: Seeking selection advice for stereo microscope
Replies: 23
Views: 1635

Re: Seeking selection advice for stereo microscope

I am trying to imagine the apparent field of view.

I can increase the real field number by roughly 8%, as in, the view becomes rough around the edges, if I remove the diaphragms from a pair of Zeiss W-PL10X/23 oculars.
by jfiresto
Fri Mar 27, 2020 11:39 am
Forum: Home-made microscope adaptations
Topic: LED bulb for Wild M20
Replies: 5
Views: 1140

Re: LED bulb for Wild M20

They were festoon style, but I also tried those Philips LED automotive replacement bulbs, and then found something else that was brighter and better regulated. ON Semiconductor makes some handy, two-terminal current regulators that you can simply drop between the power supply and the one or more ser...
by jfiresto
Fri Mar 27, 2020 8:01 am
Forum: Microscopes and optics
Topic: Seeking selection advice for stereo microscope
Replies: 23
Views: 1635

Re: Seeking selection advice for stereo microscope

Oddly, the SMZ-2T seems to typically sell for more than the SMZ-10 on eBay, but I think the 10 is actually a more advanced system. The 2T does have a higher max mag but the zoom range is the same so you can achieve about the same zoom range with 15x eyepieces on the 10. You do lose some field of vi...
by jfiresto
Thu Mar 26, 2020 9:00 am
Forum: Microscopes and optics
Topic: Seeking selection advice for stereo microscope
Replies: 23
Views: 1635

Re: Seeking selection advice for stereo microscope

The SMZ-U is indeed awesome, though typically does cost over 1k for a known good example. It would probably go above and beyond what you'd need for this but that gives you more flexibility. Nikon has a few other good options. An SMZ-10 might suit your needs with the addition of a 2x auxiliary objec...
by jfiresto
Thu Mar 05, 2020 9:07 am
Forum: Microscopes and optics
Topic: Frustration!
Replies: 64
Views: 16354

Re: Frustration!

Well, I was a newbie, who has since gained some experience – but I agree with that. If you do buy from them, and some enjoy the adventure, remember you are a newbie, swimming among a fair number of sharks. (Not all of them are!) I would have been mighty annoyed with the resellers, had I not played f...
by jfiresto
Thu Mar 05, 2020 7:46 am
Forum: Microscopes and optics
Topic: Frustration!
Replies: 64
Views: 16354

Re: Frustration!

... The problem, if there is one, is that auction resellers* ask for a premium based on the name recognition. To this the best answer is firstly to avoid auction resellers* like the plague - they commonly up their prices by 4x so even when they come down to half their asking price they are still st...
by jfiresto
Tue Mar 03, 2020 12:24 pm
Forum: Microscopes and optics
Topic: Frustration!
Replies: 64
Views: 16354

Re: Frustration!

.... How does one evaluate condition? Since there are no local dealers, I assume anything I buy will come from a remote dealer or individual. I would have to trust the seller to accurately represent the instrument. I've been burned twice already buying used microscopes. Even if the microscope works...
by jfiresto
Sun Feb 16, 2020 6:09 pm
Forum: Camera systems and imaging
Topic: Using Camera without Intermediate Optics - Nikon SMZ-U
Replies: 15
Views: 4955

Re: Using Camera without Intermediate Optics - Nikon SMZ-U

This might be the least fashionable way to mount a camera on a microscope :) Using a kenko no 5 closeup filter as a 200mm tube lens. It looks like it should be on a trestle. It's a darn shame Leica decided a 37mm port was a better idea at some point.... I agree. Did Leica also change the intermedia...
by jfiresto
Sun Feb 16, 2020 5:40 pm
Forum: Camera systems and imaging
Topic: Using Camera without Intermediate Optics - Nikon SMZ-U
Replies: 15
Views: 4955

Re: Using Camera without Intermediate Optics - Nikon SMZ-U

The older Wild/Leica 38mm adapters* and Nikon 38mm adapters are similar but I don't think quite identical. That said, since they're held in place by a set screw you can adjust the height a bit to adjust parfocality if need be.... I tend to the notion, the two have the same image height. The camera ...
by jfiresto
Sun Feb 16, 2020 5:13 pm
Forum: Camera systems and imaging
Topic: Using Camera without Intermediate Optics - Nikon SMZ-U
Replies: 15
Views: 4955

Re: Using Camera without Intermediate Optics - Nikon SMZ-U

... Well wishing you a happy birthday over the weekend John. Thank you. They were predicting cold, cloudy, wet and windy weather, but the day proved to be just the opposite. I would definitely be keen to know your measurements when you have the opportunity and keen to read your experiences. Will do...