Search found 66 matches

by dtsh
Mon Jul 06, 2020 1:32 am
Forum: Pictures and Videos
Topic: Horsefly portrait
Replies: 5
Views: 127

Re: Horsefly portrait

I can't tell for sure, but does it have 3 ocelli (simple eyes) at the top of it's head (vertex)? If it does, and the back pair of legs have 2 tiny spurs on the tibia, then I believe it is in the subfamily Pangoniinae. It looks to be in pretty good condition, the antennae break off easily. The 3 pads...
by dtsh
Sun Jul 05, 2020 4:33 am
Forum: Pictures and Videos
Topic: Horsefly portrait
Replies: 5
Views: 127

Re: Horsefly portrait

Very nice, have any more images from other angles?
by dtsh
Sat Jul 04, 2020 4:45 pm
Forum: Pictures and Videos
Topic: Stomoxys with ticks?
Replies: 4
Views: 125

Re: Stomoxys with ticks?

They probably are, but the legs look more like ticks to me than mites, not that I'm saying they are ticks, I don't know, but the appearance is interesting. I am not familiar enough with ticks or mites to know. When I find things like this it reminds me that the irritating little beast that harasses ...
by dtsh
Sat Jul 04, 2020 5:28 am
Forum: Pictures and Videos
Topic: Stomoxys with ticks?
Replies: 4
Views: 125

Stomoxys with ticks?

A few years ago I built some fly traps to capture the biting flies to help make life here in the swamp a little more tollerable. The traps work well and lately I have been comparing different trap designs and counting the contents of the traps each day to help me evaluate the effectiveness of each t...
by dtsh
Fri Jun 26, 2020 2:37 pm
Forum: Pictures and Videos
Topic: Two tabanid faces
Replies: 2
Views: 137

Two tabanid faces

I've been studying tabanids as of late and thought I'd share a couple of pictures; specimens are two different species. Pretty sure they are females, but I'm new enough to them to not be certain. Collected from the tabanid traps I built and placed on our farm to reduce their number. Edit: Magnificat...
by dtsh
Wed Jun 24, 2020 3:51 am
Forum: Collecting microscopes and slides
Topic: Interesting Slide!
Replies: 15
Views: 697

Re: Interesting Slide!

That it doesn't even lay flat is what stands out most to me, talk about bad quality control.
by dtsh
Tue Jun 23, 2020 12:49 am
Forum: Microscopes and optics
Topic: AO Cycloptic, inter model compatability
Replies: 11
Views: 287

Re: AO Cycloptic, inter model compatability

As followup, I have since tested the following two items and offer my observations on them. The A.O. 56B Transilluminating base.....it does indeed fit on a model 59 cycloptic. I don't know how many are out there still using their Cycloptics, but there it is. The Bausch and Lomb 15 U.W.F eyepieces......
by dtsh
Tue Jun 16, 2020 2:01 pm
Forum: Microscopes and optics
Topic: New member with old A.O. Spencer questions
Replies: 13
Views: 772

Re: New member with old A.O. Spencer questions

By the age I am guessing the objectives are likely DIN 160, but that's a guess. Any markings on the objective barrels you can share?
by dtsh
Mon Jun 15, 2020 8:32 pm
Forum: Microscopes and optics
Topic: Leeuwenhoek ground his lenses?
Replies: 15
Views: 637

Re: Leeuwenhoek ground his lenses?

Another question of interest (to me) is how did Leeuwenhoek (and contemporaries) grind the lenses ? on a lathe-like grinding machine ? water powered or hand-powered ? with which powder - diamond, zirconia, carbide ? In Muirden's The Amateur Astronomer's Handbook (1968), the author asserts that amat...
by dtsh
Fri Jun 12, 2020 4:52 pm
Forum: Pictures and Videos
Topic: Rocks, Minerals and Fossils
Replies: 5
Views: 272

Re: Rocks, Minerals and Fossils

Hi 75RR I have looked at holders but couldn't find anything at the moment, will need more thinking about especially as the eyepiece head moves up and down when focusing. I have had a few of similar design over the years and the cheap plastic cellphone to eyepiece adaters work pretty well. I have an...
by dtsh
Fri Jun 12, 2020 1:59 pm
Forum: Microscopy accessories
Topic: Eyepiece cases
Replies: 6
Views: 416

Re: Eyepiece cases

75RR wrote:
Fri Jun 12, 2020 6:11 am
That is pretty neat. What would be the material cost of making that?
Rounded up, the B+L case is 90g and the AO case is 55g, so about $3.00 and $1.75 US accordingly.

They take about 1.5-2 hours on my Prusa MK3S.
by dtsh
Fri Jun 12, 2020 2:38 am
Forum: Microscopy accessories
Topic: Eyepiece cases
Replies: 6
Views: 416

Eyepiece cases

I like to have a safe place to put optics into when they're not in use to protect them from getting bumped and scraped, but none of my microscope eyepieces came with much for a case. My 147's did come in two coin tubes, but aside from that everything has come to me as loose pieces so a while ago I d...
by dtsh
Mon Jun 01, 2020 7:43 pm
Forum: Identification help
Topic: What tree is this leave from?
Replies: 7
Views: 242

Re: What tree is this leave from?

Location will help, but my guess would be a Linden. Any flowers, pods, seeds, fruit?
Images of the bark and/or whole tree may also help.

That is however, a tad larger than the typical specimens examined here. :P
by dtsh
Thu May 28, 2020 2:16 pm
Forum: Home-made microscope adaptations
Topic: LED Conversion of a BH2 Trinocular
Replies: 8
Views: 386

Re: LED Conversion of a BH2 Trinocular

I used a Cree XML2 10W when I built a new illuminator for my Brinkmann microscope. The driver I used only pushes it to about 7W, but that seems more than sufficient as I haven't needed to turn it up to the highest setting yet.
(I really should assemble a parts list and diagram and post it someday)
by dtsh
Wed May 27, 2020 1:50 pm
Forum: Beginner's corner
Topic: Microscope Dust Cover
Replies: 5
Views: 201

Re: Microscope Dust Cover

I know some people are going to refuse to talk to me after this but..... I use old shopping bags. They look pretty bad, but they work and if it tears, I just grab another one. I have considered making some covers, but I haven't gotten around to it yet.
by dtsh
Tue May 26, 2020 9:51 pm
Forum: Articles and images to be published
Topic: Making Permanent Microscope Slides of Insects
Replies: 3
Views: 568

Re: Making Permanent Microscope Slides of Insects

I don't have much to contribute except to say that I am also looking into this subject. I've just completed reading the following and am still digesting the contents, I hope it will be useful to you. http://www.microscopy-uk.org.uk/mag/indexmag.html?http://www.microscopy-uk.org.uk/mag/artaug03/wdpar...
by dtsh
Tue May 26, 2020 4:34 pm
Forum: Illumination Techniques
Topic: Ideal Location for Illumination Filters
Replies: 5
Views: 253

Re: Ideal Location for Illumination Filters

I'm not optical expert, but I would think directly below the condenser where filters/stops are usually placed would be most effective.
by dtsh
Tue May 26, 2020 2:35 am
Forum: Microscopes and optics
Topic: AO Cycloptic, inter model compatability
Replies: 11
Views: 287

Re: AO Cycloptic, inter model compatability

...I think the corrections in it are actually different from the eyepiece tubes--B&L 15x UWF eyepieces seemed to produce an excellent image in the eyepieces but had more spherical distortion when placed in the trinoc tube... Also are the B&L 15x U.W.F. the same thing as the Reichert 31-15-75 15x ey...
by dtsh
Tue May 26, 2020 1:19 am
Forum: Microscopes and optics
Topic: AO Cycloptic, inter model compatability
Replies: 11
Views: 287

Re: AO Cycloptic, inter model compatability

The 2x flip-out is rare but I have one. It seems to be the same as the screw-on type, just a lot more convenient of course. That's what I suspected. I'll probably just machine a new swing out holder and cannibalize my regualr 2x barlow for the lens. It's kind of funny they even made the 59 stand, s...
by dtsh
Mon May 25, 2020 8:56 pm
Forum: Microscopes and optics
Topic: AO Cycloptic, inter model compatability
Replies: 11
Views: 287

AO Cycloptic, inter model compatability

I have an AO 59M which I picked up a few months back and I love it, but the base on the 59 series doesn't seem that great. With the other models, the base is a one-piece unit, but on the 59 series there is a metal post which joins the base to the focusing arm and at least in the case of mine, there ...
by dtsh
Mon May 25, 2020 6:54 pm
Forum: My microscope
Topic: Brinkmann
Replies: 9
Views: 2950

Re: Brinkmann

The illuminator is unpleasant to say the least, so I made a new one. 10W Cree LED but my chosen driver only goes upto 7W with a built-in dimmer circuit. The LED is mounted in an aluminum heatsink I cast for the purpose with a 3D printed PLA cover to hold it all and look nice. The frosted glass cover...
by dtsh
Fri May 22, 2020 5:19 am
Forum: For forum members who want to buy and sell equipment
Topic: How much is my Olympus BH-2/BHS worth?
Replies: 22
Views: 958

Re: How much is my Olympus BH-2/BHS worth?

Yes, I wouldn't do it without her permission. She is almost 12 years old and has her eye on other things. You know your daughter and your circumstances better than any of us, but I would be tempted to hold onto it a few more years if I could. You may have already done this, but if you wish to spark...
by dtsh
Tue May 19, 2020 9:58 pm
Forum: Microscopes and optics
Topic: Introductory microscope and with digital adapter?
Replies: 9
Views: 396

Re: Introductory microscope and with digital adapter?

I was planning on buying a simple microscope at home, and I saw the recommendation for the National Optical SS110. Is there a digital camera that I can mount on that which will capture decent quality video (at least 1080p?) via USB-3 or USB-C? It depends on your expectations, there are some very in...
by dtsh
Tue May 19, 2020 5:31 pm
Forum: My microscope
Topic: My New Leica DM750 - Unboxing and Setup
Replies: 13
Views: 688

Re: My New Leica DM750 - Unboxing and Setup

That's an interesting adapter for the phone, can you share some details about it?
by dtsh
Wed May 13, 2020 4:10 am
Forum: Beginner's corner
Topic: Hi I'm new and was thinking off buying a microscope
Replies: 7
Views: 572

Re: Hi I'm new and was thinking off buying a microscope

Hi iv kept pigeons for years and we send our droppings of to be tested under microscope for different things like Coccidia, Salmonellosis,was wondering if I would be wasting my time buying a good microscope to see if I could Learn to use one and look out for things like this as I find it really int...
by dtsh
Fri May 08, 2020 7:12 pm
Forum: Microscopes and optics
Topic: Olympus CX31 stuck objective
Replies: 9
Views: 868

Re: Olympus CX31 stuck objective

Anytime you apply more force than hand tight there's a risk of damage, that said... In general if you can grab it with a small strap wrench or a pair of pliers that have a soft-jaw or something between the jaws and the objective surface, such as a piece of leather, rubber, etc to protect the finish ...
by dtsh
Fri May 08, 2020 6:54 pm
Forum: Beginner's corner
Topic: Stereo microscope magnification comparison?
Replies: 21
Views: 1187

Re: Stereo microscope magnification comparison?

All of these things, yes. Thanks again! Honestly, my budget would be sub $200. Regarding used microscopes... even if I had the knowledge to know a good deal when I saw one, waiting around for one to come along is just more time that I don't have a microscope. I guess I'm looking more for something ...
by dtsh
Fri May 08, 2020 2:19 pm
Forum: Beginner's corner
Topic: Stereo microscope magnification comparison?
Replies: 21
Views: 1187

Re: Stereo microscope magnification comparison?

Thank you everyone for your advice. So after furthering attempting to parse out my daughter's interest, I think she'd actually be best suited with a magnifying glass or one of those containers with a screw on lid with magnification. Sigh I think that's an excellent option, when she's outgrown that ...
by dtsh
Thu May 07, 2020 3:18 pm
Forum: Identification help
Topic: Looking for an ID
Replies: 5
Views: 845

Re: Looking for an ID

It isn't, but very much reminds me of Dickinsonia
by dtsh
Thu May 07, 2020 6:17 am
Forum: Beginner's corner
Topic: Stereo microscope magnification comparison?
Replies: 21
Views: 1187

Re: Stereo microscope magnification comparison?

At that age I would go for some magnifying lenses. I would think at that age, there would be a higher likelihood of acidental rough treatment which a lens should withstand much better, plus I think a hand lens is intuitive in ways a scope may not be and is easier to take along. If however, you are l...