Search found 167 matches
- Thu Jan 14, 2021 4:35 pm
- Forum: Pictures and Videos
- Topic: Paratomy
- Replies: 8
- Views: 217
Re: Paratomy
Aeolosoma hemprichi is very easy to keep in culture too. I kept some going for three years in a deep petri dish. Just feed them a little piece of spinach leaf once a week or so, and change the water when there gets to be too much debris left over. I've seen as many as four of them hooked together no...
- Mon Jan 11, 2021 10:16 pm
- Forum: Beginner's corner
- Topic: Selecting BH2 adapter for photo AND video
- Replies: 2
- Views: 336
Re: Selecting BH2 adapter for photo AND video
Which Sony? Find out what part of the sensor is being used for the video resolution you intend to shoot. If it shoots video using the full frame at that resolution, your good with the NFK 2.5x. If it's smaller than full frame, you'll either need to accept the crop factor or come up with another solu...
- Tue Jan 05, 2021 2:11 am
- Forum: Microscopes and optics
- Topic: Monochromatic Microscopes?
- Replies: 14
- Views: 631
Re: Monochromatic Microscopes?
Color provides contrast among other things. Without color, you will need to find some other way to increase contrast enough to tell one thing from the other. It also provides more specific clues as to what you are looking at by way of differential staining. Think of the difficulty in distinguishing ...
- Mon Jan 04, 2021 11:27 pm
- Forum: Microscopes and optics
- Topic: Monochromatic Microscopes?
- Replies: 14
- Views: 631
Re: Monochromatic Microscopes?
I'm curious to know in what hematology applications field width is prized over all else, including color?
- Mon Jan 04, 2021 5:16 am
- Forum: Camera systems and imaging
- Topic: Budget Friendly BH2 Video?
- Replies: 40
- Views: 1356
Re: Budget Friendly BH2 Video?
No, actually. I won't modify my photography systems to take pictures for you. And I have no inclination to check or comment on your math. I've explained what I use and why. Asking me to do testing for you so you can figure out why your math is confusing or misleading you is unreasonable, and not som...
- Mon Jan 04, 2021 1:19 am
- Forum: Microscopes and optics
- Topic: Olympus eyepiece markings?
- Replies: 3
- Views: 280
Re: Olympus eyepiece markings?
The + inside a circle should mean there is a crosshair reticle in place. These are mostly used on polarizing microscopes and generally cost somewhat more than an eyepiece without the reticle as they are relatively rare. They are also handy if you are trying to collimate the eyepieces in a binocular ...
- Sun Jan 03, 2021 9:59 pm
- Forum: Camera systems and imaging
- Topic: Budget Friendly BH2 Video?
- Replies: 40
- Views: 1356
Re: Budget Friendly BH2 Video?
The bottom line is that you need an image circle at the sensor that is large enough to enclose the entire area of the sensor that is used to capture the image. If it's smaller, you get vignetting. You really have very few reasonable choices as to how to get there. You are limited to the available pr...
- Sat Jan 02, 2021 9:36 pm
- Forum: For forum members who want to buy and sell equipment
- Topic: Wanted to buy: Olympus U-DCW Oil Darkfield Condenser
- Replies: 7
- Views: 328
Re: Wanted to buy: Olympus U-DCW Oil Darkfield Condenser
ScienceMatters - I just sent you a private message.
Tom
Tom
- Sun Dec 27, 2020 3:27 pm
- Forum: Camera systems and imaging
- Topic: Budget Friendly BH2 Video?
- Replies: 40
- Views: 1356
Re: Budget Friendly BH2 Video?
I only use the GH4 for video on the microscopes, so I have no experience with it's electronic shutter in the photography mode.
Tom
Tom
- Sun Dec 27, 2020 4:15 am
- Forum: Camera systems and imaging
- Topic: Budget Friendly BH2 Video?
- Replies: 40
- Views: 1356
Re: Budget Friendly BH2 Video?
A mag changer can help with photographic framing. You can actually do the same thing with different projection eyepiece magnifications too. I originally got one to help with framing specimens for outreach demonstrations, so the kids didn't have to search so much for what I was trying to show them. A...
- Sun Dec 27, 2020 2:53 am
- Forum: Camera systems and imaging
- Topic: Budget Friendly BH2 Video?
- Replies: 40
- Views: 1356
Re: Budget Friendly BH2 Video?
I think using a calibration slide is the only way to get accurate dimensional information for scale bars. Basically, Photograph the calibration slide with the objectives you intend to use (or all of them to be complete) with the same camera and projection setup you will use with the specimens. If yo...
- Sat Dec 26, 2020 7:18 pm
- Forum: Camera systems and imaging
- Topic: Budget Friendly BH2 Video?
- Replies: 40
- Views: 1356
Re: Budget Friendly BH2 Video?
I recommended the GH4 because I've had one since they were new, and I know it works well in this application. It's also pretty cheap (used) right now. Origianally it was recommended to me by a microscopy/photography professor friend. The GH5 is newer, same sensor and mount, but probably ~$1500. I kn...
- Sat Dec 26, 2020 3:33 pm
- Forum: Camera systems and imaging
- Topic: Budget Friendly BH2 Video?
- Replies: 40
- Views: 1356
Re: Budget Friendly BH2 Video?
Easily done. Panasonic GH4 (~$500-600 used), M4/3 to C-mount adapter(~$10, Fotodiox, Fotasy, etc.), NFK 3.3x (~$50-75), U-PMTVC 0.3x C-mount to microscope adapter (~$100-125). The combination of the 3.3x and 0.3x is close to 1x, so you have essentially direct projection, with the color correction ne...
- Mon Dec 07, 2020 3:00 pm
- Forum: Microscopy accessories
- Topic: Slide storage drawer cabinets. BAD IDEA!
- Replies: 7
- Views: 614
Re: Slide storage drawer cabinets. BAD IDEA!
Those are designed for long-term storage of pathology slides, and for that they work very well. They're very compact for the number of slides they contain. Sliding stops or even foam blocks, are used to keep the slides vertical. Small cards can delineate time, or specimen number ranges. Modern mount...
- Wed Dec 02, 2020 4:21 pm
- Forum: For forum members who want to buy and sell equipment
- Topic: Looking for Olympus Photomicro Adapter L
- Replies: 19
- Views: 2022
Re: Looking for Olympus Photomicro Adapter L
I use these Diagnostic Instruments PA1-10A adapters. They work really well on either BH2 or BX series microscopes in place of the Photomicro Adapter L: https://www.ebay.com/itm/Nikon-F-Mount-to-Olympus-BH2-BX-Microscope-DSLR-Camera-Adapter-PA1-10A/223686036249?hash=item3414ba0b19:g:eYAAAOSwTvNdkLqF ...
- Sat Nov 28, 2020 3:33 pm
- Forum: Beginner's corner
- Topic: STAINS.. Sooo many these days
- Replies: 7
- Views: 675
Re: STAINS.. Sooo many these days
It might be a bit excessive, and it's certainly thorough, but there's always this to help you make up your mind: https://www.amazon.com/Conns-Biological ... 1859960995 

- Sat Nov 07, 2020 4:52 pm
- Forum: Microscopes and optics
- Topic: Olympus bx50 microscope
- Replies: 7
- Views: 826
Re: Olympus bx50 microscope
The BX-50 is an excellent microscope. I don't know who mentioned the sunburned eyes, but they don't know what they're talking about. These microscopes are designed for research and clinical use where they are used for hours on end. I don't remember any of my colleagues in clinical labs complaining a...
- Fri Oct 30, 2020 5:08 pm
- Forum: Pictures and Videos
- Topic: Displaying my images on YouTube
- Replies: 8
- Views: 1028
Re: Displaying my images on YouTube
Actually, unless you are trying to demonstrate how a deaf person would view your slideshow 8-) , some kind of music or background sound is better. A slide show without sound or narration is like handing friends a series of printed still image without comment. :twisted: You probably wouldn't do it. E...
- Thu Oct 22, 2020 2:36 am
- Forum: Pictures and Videos
- Topic: Rouleaux
- Replies: 2
- Views: 434
Re: Rouleaux
Dilute the drop of blood immediately with saline. Put the saline drop on the slide first, then a small drop of blood and mix.
- Sat Oct 03, 2020 11:20 pm
- Forum: My microscope
- Topic: A thought about size
- Replies: 19
- Views: 2343
Re: A thought about size
Per your Wiki link: Psychophysics quantitatively investigates the relationship between physical stimuli and the sensations and perceptions they produce. Psychophysics has been described as "the scientific study of the relation between stimulus and sensation"[1] or, more completely, as "the analysis ...
- Sun Sep 20, 2020 3:28 am
- Forum: Beginner's corner
- Topic: Need help in buying first "used" microscope.
- Replies: 4
- Views: 510
Re: Need help in buying first "used" microscope.
Anton, I personally think that particular microscope is a good deal. Synchrostream has been around a long time and sells quite a few microscopes and parts. They offer a 30 day return, and free shipping. Properly packaged shipping's about $100 by itself. It's not the cheapest, but it's well within yo...
- Fri Sep 18, 2020 7:13 pm
- Forum: For forum members who want to buy and sell equipment
- Topic: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube
- Replies: 24
- Views: 1425
Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube
I have a spare OM adapter I'll sell, but no spare NFK 2.5x photoeyepiece.
$125 plus insured shipping. PM me if you're interested.
Tom
$125 plus insured shipping. PM me if you're interested.
Tom
- Sat Aug 29, 2020 2:49 pm
- Forum: Beginner's corner
- Topic: Opinions on listing
- Replies: 10
- Views: 1256
Re: Opinions on listing
While lots of sellers are clueless, there are good ones too. Synchrostream has been around for a long time and is quite aware as to what they are selling. Not cheap, but I've bought from them before and been satisfied. Notice too the 30 day return period. That's not something a dicey seller will usu...
- Wed Aug 26, 2020 2:47 pm
- Forum: Beginner's corner
- Topic: Microscope for engine oil analysis
- Replies: 43
- Views: 3567
Re: Microscope for engine oil analysis
Is the microscopic analysis you're planning to do in addition to, or in lieu of normal oil (spectrographic, etc.) analysis?? Among others... https://www.blackstone-labs.com/tests/standard-analysis/ I have an oil analysis done, cut the oil filter and inspect the element each time I change oil on my a...
- Sun Jul 26, 2020 3:46 pm
- Forum: Resources (online, books etc.)
- Topic: Microscopy FAQ
- Replies: 13
- Views: 2611
Re: Microscopy FAQ
Wow Carl. Nicely done!
- Fri Jul 24, 2020 2:18 am
- Forum: Beginner's corner
- Topic: floaters
- Replies: 20
- Views: 2634
Re: floaters
Floaters are inside your eye. There is nothing you can put in your eyes that will get rid of them. The best option is to learn to ignore them. If they're bad, the next best option is laser vitriolysis, where a YAG laser is used by an ophthalmologist to disrupt them as much as possible. There are fou...
- Fri Jun 19, 2020 3:17 am
- Forum: For forum members who want to buy and sell equipment
- Topic: Wanted: Olympus NFK 1.67x or NFK 2.5x
- Replies: 24
- Views: 4781
Re: Wanted: Olympus NFK 1.67x or NFK 2.5x
Just out of curiosity, what do you consider to be a reasonable price for the NFK 2.5x and NFK 1.67X?
- Mon Jun 15, 2020 4:06 pm
- Forum: Beginner's corner
- Topic: Condensers - venting frustration
- Replies: 13
- Views: 2016
Re: Condensers - venting frustration
Maryfox, As you have found out, basic microscopy with low magnifications and relatively low expectations is pretty easy. Once you start up the slope wanting more, it gets a lot more complicated. I've posted this once before several years ago http://www.microbehunter.com/microscopy-forum/viewtopic.ph...
- Wed May 27, 2020 4:32 am
- Forum: Microscopes and optics
- Topic: Introductory microscope and with digital adapter?
- Replies: 9
- Views: 1154
Re: Introductory microscope and with digital adapter?
Actually, using that microscope, I think your best bet is to use your cell phone. It's much easier than it sounds. They can certainly shoot 1080p and probably shoot 4k video if you would like. They can also be wired to an external monitor as well. You'll get to see on your screen everything your eye...
- Mon May 11, 2020 2:30 am
- Forum: For forum members who want to buy and sell equipment
- Topic: Advice on physician microscope
- Replies: 8
- Views: 1418
Re: Advice on physician microscope
PeteM is right. My vote is for the Olympus BX series. I was a clinical lab supervisor in the second busiest trauma center in California for a long time. In 1999, when we built a new hospital, we switched from AO's and Olympus BH-2s, to Olympus BX-40's in the clinical lab (micro, UA, and hematology)....