Search found 336 matches
- Thu Jun 03, 2021 3:31 pm
- Forum: Pictures and Videos
- Topic: Actinosphaerium eichhorni
- Replies: 9
- Views: 2997
Re: Actinosphaerium eichhorni
Damn that's beautiful!!
- Wed May 05, 2021 2:33 am
- Forum: Beginner's corner
- Topic: eyepiece camera vs phone
- Replies: 7
- Views: 2906
Re: eyepiece camera vs phone
Don, turn the phone horizontally if you crop in the phone, and the vertical format becomes horizontal. If you're shooting stills you can crop any way you want, horizontal, vertical, or rotated in some weird way to match specimen orientation (see the demo foraminifera shot cropped in Lightroom in the...
- Mon May 03, 2021 7:27 pm
- Forum: Beginner's corner
- Topic: eyepiece camera vs phone
- Replies: 7
- Views: 2906
Re: eyepiece camera vs phone
Cell phone cameras work just fine. If you're careful, and practice a bit, you can do very well hand-held. I've shot publication quality stills hand-held. You can do much, much better with a cell phone mount of some kind, even shooting very nice 4K or 8K video, if your phone will support it. I person...
- Sat Mar 27, 2021 2:57 pm
- Forum: For forum members who want to buy and sell equipment
- Topic: Ebay microscope sales scam. Anyone know the details?
- Replies: 9
- Views: 3004
Re: Ebay microscope sales scam. Anyone know the details?
Never say die... the IX71 is back. 133706240027
- Fri Mar 26, 2021 2:43 am
- Forum: For forum members who want to buy and sell equipment
- Topic: Ebay microscope sales scam. Anyone know the details?
- Replies: 9
- Views: 3004
Re: Ebay microscope sales scam. Anyone know the details?
Damn, it was gone before I finished posting!
- Fri Mar 26, 2021 2:37 am
- Forum: For forum members who want to buy and sell equipment
- Topic: Ebay microscope sales scam. Anyone know the details?
- Replies: 9
- Views: 3004
Re: Ebay microscope sales scam. Anyone know the details?
Talk about timing, here's the number of the fraudulent IX70 Ebay sale: 133704755178 I've reported this particular one, with other numbers I'm sure, several times. Just for sport, I'll refrain from reporting it for awhile so anyone can see what's going on, although his other item list come up as miss...
- Fri Mar 26, 2021 1:47 am
- Forum: For forum members who want to buy and sell equipment
- Topic: Ebay microscope sales scam. Anyone know the details?
- Replies: 9
- Views: 3004
Re: Ebay microscope sales scam. Anyone know the details?
I've seen a bunch of those over the last several months. IX-70/71 with a starting bid of $32 last time, or other absurd prices. They swipe listing pictures from legit listings, and sometimes copy the other data as well. Somewhere in the listing is often a photo of their "Buy it Now" really low price...
- Mon Mar 22, 2021 11:22 pm
- Forum: Pictures and Videos
- Topic: Nikon Small world competition
- Replies: 4
- Views: 1653
Re: Nikon Small world competition
That was done using an Olympus BHS, SPlan objectives and DIC. Video shot in 4K UHD using a Panasonic GH4.
Tom
Tom
- Mon Mar 22, 2021 6:37 pm
- Forum: Pictures and Videos
- Topic: Nikon Small world competition
- Replies: 4
- Views: 1653
Re: Nikon Small world competition
Yep. Honorable Mention 2018 Small World in Motion: https://www.nikonsmallworld.com/galleri ... er-feeding
Full video here: https://www.youtube.com/watch?v=mqZns4wo0AQ
Full video here: https://www.youtube.com/watch?v=mqZns4wo0AQ
- Fri Mar 19, 2021 2:32 pm
- Forum: Beginner's corner
- Topic: Condensers, how do you properly use them?
- Replies: 17
- Views: 4923
Re: Condensers, how do you properly use them?
You might find this (long) video explanation, by Peter Evennett (Royal Microscopical Society and Quekett Microscopical Club) , of how microscope optics work useful: https://www.youtube.com/watch?v=60_jgZtyR6U It answers a lot of questions and I really wish I'd had it as a reference when I was first ...
- Fri Mar 12, 2021 5:57 am
- Forum: Microscopy accessories
- Topic: Counting chambers
- Replies: 9
- Views: 3956
Re: Counting chambers
And they certainly do have etched grids for counting. Counts wouldn't be reasonably possible otherwise.
- Fri Mar 12, 2021 5:55 am
- Forum: Microscopy accessories
- Topic: Counting chambers
- Replies: 9
- Views: 3956
Re: Counting chambers
It doesn't change anything. It's just a thick glass base designed to be washed and reused many, many times. For years if you're careful. The distance to the floor of the counting chamber from the top of the cover slip is well within the working distance of regular 40x objectives. That is what they w...
- Fri Mar 12, 2021 1:38 am
- Forum: Microscopy accessories
- Topic: Counting chambers
- Replies: 9
- Views: 3956
Re: Counting chambers
It's called a Hemocytometer. They provide a flat, gridded and highly accurate counting volume. Before automated RBC, WBC, and platelet cell counters these are what was used to perform the counts in clinical labs. Lots of sperm counts and body fluid (pleural, peritoneal and CSF) cell counts are still...
- Thu Mar 04, 2021 4:24 pm
- Forum: Microscopy accessories
- Topic: Pol Sliders ... Advice needed please
- Replies: 8
- Views: 3167
Re: Pol Sliders ... Advice needed please
MichaelG, That's indicating the "slow wave" axis for the waveplate. Slow waves and fast waves are properties of polarized light. You're going to find those interesting to play with. The sensitive tint should be a full wave (AKA first order) retarder, the quarter wave (lambda) retarder is just that, ...
- Mon Feb 22, 2021 7:16 pm
- Forum: Specimens, samples and slides
- Topic: Amoebas dangerous ?
- Replies: 13
- Views: 5657
Re: Amoebas dangerous ?
I'm a retired Clinical Lab Scientist with a degree in clinical microbiology. I was a lab supervisor for 25 years. SB County Hospital, renamed Arrowhead Regional Medical Center when we moved to a new campus in 1999, was, and probably still is, the second busiest trauma center in California. As a resu...
- Mon Feb 22, 2021 4:48 pm
- Forum: Specimens, samples and slides
- Topic: Amoebas dangerous ?
- Replies: 13
- Views: 5657
Re: Amoebas dangerous ?
To quote the CDC: Although most cases of primary amebic meningoencephalitis (PAM) caused by Naegleria fowleri infection in the United States have been fatal (144/148 in the U.S., 1), there have been five well-documented survivors in North America: one in the U.S. in 1978 2, 3, one in Mexico in 2003 ...
- Tue Feb 02, 2021 4:50 pm
- Forum: Identification help
- Topic: Stool Microscopy - Parasite DD - Artifacts?
- Replies: 6
- Views: 2282
Re: Stool Microscopy - Parasite DD - Artifacts?
Diagnostic parasitology isn't something you can learn quickly or easily. It takes good training, a lot of time at the microscope, and a whole lot of specimens, positive and negative, to even get adequate, so don't feel bad.
- Tue Feb 02, 2021 4:12 pm
- Forum: Identification help
- Topic: Stool Microscopy - Parasite DD - Artifacts?
- Replies: 6
- Views: 2282
Re: Stool Microscopy - Parasite DD - Artifacts?
It's been quite awhile since I did any diagnostic parasitology, but I think they were correct in not treating. The fact that you were left alone with the specimen should probably tell you something. I've no idea what the first two are, but they really don't look like eggs, or anything important to m...
- Tue Feb 02, 2021 2:16 pm
- Forum: Identification help
- Topic: Stool Microscopy - Parasite DD - Artifacts?
- Replies: 6
- Views: 2282
Re: Stool Microscopy - Parasite DD - Artifacts?
So, since you're in med school, what did your lab instructor say they were?
- Thu Jan 14, 2021 4:35 pm
- Forum: Pictures and Videos
- Topic: Paratomy
- Replies: 8
- Views: 3231
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: 1794
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: 4647
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: 4647
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: 41
- Views: 15909
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: 1984
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: 41
- Views: 15909
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: 13
- Views: 5032
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: 41
- Views: 15909
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: 41
- Views: 15909
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: 41
- Views: 15909
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...