Search found 310 matches

by dtsh
Fri May 07, 2021 1:42 pm
Forum: Miscellaneous
Topic: Things Seen on Mars
Replies: 10
Views: 457

Re: Things Seen on Mars

Ya'll ever wonder what it would be like to look at microscopic samples taken from other planets? I mean maybe there is microscopic life on other planets? Has NASA done this or anybody? There have beena couple of tests attempted to look for signs of life chemically. Spirit and Opportunity and perhap...
by dtsh
Wed May 05, 2021 8:43 pm
Forum: Miscellaneous
Topic: The Problem of Doing.
Replies: 7
Views: 209

Re: The Problem of Doing.

I'm somewhere between linuxusr and DonSchaeffer, I enjoy reading and learning about a subject as it helps me really appreciate it, but there is a sense of discovery and exploration to just getting in there and seeing what can be seen. The desire to categorize and understand is typically there though...
by dtsh
Mon May 03, 2021 3:22 pm
Forum: For forum members who want to buy and sell equipment
Topic: eyepiece camera 23.2mm and 30mm
Replies: 1
Views: 81

Re: eyepiece camera 23.2mm and 30mm

I have no experience with that camera, but the listed specs say it is a 1/3.2 sensor, which is small and will likely result in significant crop factor.
by dtsh
Sun May 02, 2021 8:57 pm
Forum: Illumination Techniques
Topic: American Optical 110 Darkfield Patch Sizes
Replies: 4
Views: 190

Re: American Optical 110 Darkfield Patch Sizes

Very nice indeed! Is that for the 110 series (34.5mm)? My apologies, I thought the 10, 110, and 410 series all had the same size slot. I have since lengthened it and made a version for the 110 and 410. Thanks for letting me know. You'll want the "ao_filter_holder_34.5.obj" file for the 110. https:/...
by dtsh
Sun May 02, 2021 5:01 pm
Forum: Illumination Techniques
Topic: American Optical 110 Darkfield Patch Sizes
Replies: 4
Views: 190

Re: American Optical 110 Darkfield Patch Sizes

I created a simple adapter for the AO filter slots to allow typical 32mm filters to be used.

https://www.thingiverse.com/thing:4836163

It's also usable as an oblique illumination stop, but I need to make it a tad longer to do that well.
by dtsh
Sat May 01, 2021 10:55 pm
Forum: Pictures and Videos
Topic: water lens under UV...
Replies: 6
Views: 226

Re: water lens under UV...

Also commonly known in some areas as "duckweed"
by dtsh
Sat May 01, 2021 5:16 pm
Forum: Pictures and Videos
Topic: Newbie learns to take images, dtsh edition
Replies: 14
Views: 771

Re: Newbie learns to take images, dtsh edition

Thanks for the comments. While the HQ camera is certainly nicer, the much smaller V2 is better than I expected and I was relatively satisfied with it, but I had an HQ just sitting around and in the process of sorting through an older box of optical stuff I found some nice c mount lenses which I beli...
by dtsh
Sat May 01, 2021 3:43 am
Forum: Microscopes and optics
Topic: N.A. Re-visit
Replies: 11
Views: 385

Re: N.A. Re-visit

As I understand it, that's a general rule for what magnification you can expect before reaching empty magnification. With the usual 10x eyepieces one is typically well within the useful range of the objective allowing you to swap in higher mag eyepieces to get more. For example, if you have 40x obje...
by dtsh
Fri Apr 30, 2021 11:28 pm
Forum: Pictures and Videos
Topic: Newbie learns to take images, dtsh edition
Replies: 14
Views: 771

Re: Newbie learns to take images, dtsh edition

Taken using the v2 and the HQ camera on an AO10

Mosquito wing, 100x and 400x.
1.jpg
1.jpg (107.56 KiB) Viewed 217 times
3.jpg
3.jpg (159.88 KiB) Viewed 217 times
by dtsh
Fri Apr 30, 2021 2:48 pm
Forum: Pictures and Videos
Topic: What is this thing?
Replies: 11
Views: 316

Re: What is this thing?

I agree with Mr Howald, given more context and something for scale it's likely a mite of some sort.
by dtsh
Thu Apr 29, 2021 9:02 pm
Forum: Specimens, samples and slides
Topic: Substitutes for Hay Infusion?
Replies: 8
Views: 274

Re: Substitutes for Hay Infusion?

A bit of dirt, lawn clippings, a sample of standing water, you name it. You'll get something just by leaving a jar of water open on a windowsill for a while, but seeding it with clippings/dirt is likely to be faster and a water sample faster yet. A bit of food for them, such as a few crumbs of humus...
by dtsh
Thu Apr 29, 2021 5:34 pm
Forum: Home-made microscope adaptations
Topic: AO10 condenser filter slot / aux lens
Replies: 4
Views: 247

Re: AO10 condenser filter slot / aux lens

Actually, having the auxilary lens at the optical center is beneficial . It isn't as noticeable visually but for photography , it reduces a slight uneveness in the background given that the condenser struggles to fill the field. With the series 4. Very noticeable for phase contrast when using the 1...
by dtsh
Thu Apr 29, 2021 5:28 pm
Forum: Miscellaneous
Topic: Things Seen on Mars
Replies: 10
Views: 457

Re: Things Seen on Mars

Ya'll ever wonder what it would be like to look at microscopic samples taken from other planets? I mean maybe there is microscopic life on other planets? Has NASA done this or anybody? There have beena couple of tests attempted to look for signs of life chemically. Spirit and Opportunity and perhap...
by dtsh
Thu Apr 29, 2021 5:05 pm
Forum: Pictures and Videos
Topic: What is this thing?
Replies: 11
Views: 316

Re: What is this thing?

probably a water mite or if i see festoons in the second picture maybe a lost hard bodied tick but thats more about me having ticks on the mind. you need to catch it and look at more closely! Looks like festoons to me and as I understand it, ticks can live an amazingly long time underwater. Some as...
by dtsh
Thu Apr 29, 2021 3:46 pm
Forum: Beginner's corner
Topic: Using a pair of cameras with a stereo microscope
Replies: 37
Views: 1964

Re: Using a pair of cameras with a stereo microscope

The optical arrangement looks plenty good enough for stereoscopic video ... I just need two suitable cameras. The Raspberry pi compute module supports two camera inputs and has a couple of camera options, a v2 camera module of 8MP which is relatively inexpensive and a 16MP HQ camera which is more. ...
by dtsh
Thu Apr 29, 2021 3:32 pm
Forum: Home-made microscope adaptations
Topic: AO10 condenser filter slot / aux lens
Replies: 4
Views: 247

Re: AO10 condenser filter slot / aux lens

Some of them used a doughnut shaped cam as a stop. Loosening the screw allows you to rotate it for precise alignment of the optical center. I haven't checked on the screw size but probably the #2 are missing the cam? I believe I have one of what you are describing and it is the one with the #2 scre...
by dtsh
Thu Apr 29, 2021 3:17 am
Forum: Microscopy accessories
Topic: A quick review of a 3V-12V 5A powersupply
Replies: 13
Views: 1129

Re: A quick review of a 3V-12V 5A powersupply

I would be interested in your parts list. Besides the AOs I have two Ortholux I that have missing illumination systems Gerard In case my parts list is of value, this is what I used. Not included is a resistor, I think 15k? and a 10k potentiometer. If there's an interest in the schematic I can make ...
by dtsh
Thu Apr 29, 2021 2:53 am
Forum: Pictures and Videos
Topic: Mutated Amblyomma americanum
Replies: 6
Views: 261

Re: Mutated Amblyomma americanum

Ah my old friend; A. americanum , it has given me so much over the years, mostly ehrlichiosis. That's an interesting specimen, I wonder if it was due to an injury as an earlier instar? Somewhere around here I have a video clip of a great many early instars of A. americanum (probably) swarming over m...
by dtsh
Wed Apr 28, 2021 9:36 pm
Forum: Home-made microscope adaptations
Topic: AO10 condenser filter slot / aux lens
Replies: 4
Views: 247

AO10 condenser filter slot / aux lens

First off, I found a couple of the condensers for the AO10 Series in my posession were missing the the add-on filter slot. I presume this was some sort of option, thus wasn't always included, so I spent a little time taking measurements and modelled one based off the ones I have that do have it. It'...
by dtsh
Sun Apr 25, 2021 10:05 pm
Forum: Miscellaneous
Topic: Cleaning the Immersion Objective
Replies: 14
Views: 520

Re: Cleaning the Immersion Objective

I think you'll find it hard to get a drop of oil on an objective without getting it everwhere else first unless your bottle has an applicator rod or the like, but even then my money is on everywhere you don't want it first. My AO bottle has a dropper and my Cargille has a rod, with the AO bottle I'd...
by dtsh
Sun Apr 25, 2021 9:37 pm
Forum: Microscopy accessories
Topic: Best URL's for Lab Supplies
Replies: 7
Views: 420

Re: Best URL's for Lab Supplies

I suspect it's the same with a lot of places where it's hit or miss, I've ordered form Carolina Biological in the last year and had no problem. I've also had McMaster-Carr refuse to deal with me on some orders then turn right around and deal with me other times. In the past I've had companies tell m...
by dtsh
Sun Apr 25, 2021 4:20 pm
Forum: Pictures and Videos
Topic: Otodectes cynotis
Replies: 3
Views: 141

Re: Otodectes cynotis

qanunji wrote:
Sun Apr 25, 2021 8:33 am
yes, probably a larva.
Now I need to catch the cat...
It's not going to stay on the stage and too big to be held down with a coverslip! :lol:
by dtsh
Sun Apr 25, 2021 3:43 pm
Forum: Microscopy accessories
Topic: Should I buy a small centrifuge for amateur microscopy?
Replies: 2
Views: 192

Re: Should I buy a small centrifuge for amateur microscopy?

I have one of the inexpensive import ones which I use occasionally. For general use I wouldn't bother with one unless you're doing something that requires it and save the money and space. They are susceptible to imbalance issues, but at least in my limited experience attention to loading it with tub...
by dtsh
Sat Apr 24, 2021 10:41 pm
Forum: Pictures and Videos
Topic: What is this?
Replies: 2
Views: 114

Re: What is this?

Looks to me like a Daphnia or related "water flea""
by dtsh
Sat Apr 24, 2021 6:58 pm
Forum: For forum members who want to buy and sell equipment
Topic: Microscopes for sale
Replies: 8
Views: 437

Re: Microscopes for sale

I'm interested in AO stuff, but at the top of my AO wants are 15x 182 eyepieces and a 1040 vertical monocular head.
by dtsh
Sat Apr 24, 2021 5:48 am
Forum: Pictures and Videos
Topic: Newbie learns to take images, dtsh edition
Replies: 14
Views: 771

Re: Newbie learns to take images, dtsh edition

Today was an unexpected opportunity to record my first video through the microscope. I believe this to be the algae Synura. Rpi camerav2 again with the same AO 10 though this is the last video from this scope, it's packed up and headed out next week.

https://imgur.com/FSg85yK
by dtsh
Sat Apr 24, 2021 5:14 am
Forum: Miscellaneous
Topic: Cleaning the Immersion Objective
Replies: 14
Views: 520

Re: Cleaning the Immersion Objective

I'm not a pro by any means, but for cleaning I start with the most mild thing I can and work my way up through solvents as needed. Thus far I have found plain distilled water is frequently effective alone or with a drop of soap and rarely reach for anything more. As I understand it, one of the probl...
by dtsh
Fri Apr 23, 2021 6:11 pm
Forum: Camera systems and imaging
Topic: A DIY Raspberry Pi Based Computational Microscope
Replies: 7
Views: 320

Re: A DIY Raspberry Pi Based Computational Microscope

There's OpenFlexure as well. I haven't done anything but look at the project. https://openflexure.org/ Yeah, similar idea though maybe a bit crude. The two I posted were cited in the Sanderson prism DIC paper from the diy DIC thread :) Louise Certainly not promoting it as better, just another thing...
by dtsh
Fri Apr 23, 2021 5:15 pm
Forum: Camera systems and imaging
Topic: A DIY Raspberry Pi Based Computational Microscope
Replies: 7
Views: 320

Re: A DIY Raspberry Pi Based Computational Microscope

There's OpenFlexure as well. I haven't done anything but look at the project.
https://openflexure.org/
by dtsh
Fri Apr 23, 2021 12:55 pm
Forum: Introduce yourself
Topic: Scope Status
Replies: 17
Views: 701

Re: Scope Status

@dtsh Well you beat me on longevity for Linux as primary OS. It's been my primary OS since Ubuntu Dapper Drake and now Canonical is on round two of the alphabet with Hirsute Hippopotamus in beta . . . I used RHEL briefly before that. Yes, Koehler illumination does not increase resolution but it doe...