Search found 74 matches

by dtsh
Mon Jul 20, 2020 2:57 pm
Forum: Beginner's corner
Topic: Microscope for moss/plants
Replies: 4
Views: 1006

Re: Microscope for moss/plants

While I haven't done a lot of study on mosses and what little I did was some time ago, but I think a good stereo microscope would be more useful than a compound except in a few specific areas.
by dtsh
Wed Jul 15, 2020 2:04 pm
Forum: For forum members who want to buy and sell equipment
Topic: Wanted: AO Cycloptic barlow (cat 265, 266, 267) (FOUND)
Replies: 9
Views: 896

Re: Wanted: AO Cycloptic barlow (cat 265, 266, 267) (FOUND)

In an unexpected twist of events, I managed to find an original swing out barlow. I may pick this back up later and convert my other 2x barlow into a swingout, but for now it's done.

Thanks for the interest everyone.
by dtsh
Wed Jul 15, 2020 3:01 am
Forum: My microscope
Topic: My first microscope thank you for your help that you did not even know you had given.
Replies: 8
Views: 1436

Re: My first microscope thank you for your help that you did not even know you had given.

Congrats, it looks like you made good use of the resources available.
by dtsh
Tue Jul 14, 2020 5:32 pm
Forum: For forum members who want to buy and sell equipment
Topic: Wanted: AO Cycloptic barlow (cat 265, 266, 267) (FOUND)
Replies: 9
Views: 896

Re: Wanted: AO Cycloptic barlow (cat 265, 266, 267)

What do you do about Illumination? For what I'm picturing a ring light is problematic but certainly not the only possibility. My OPMI and Stemi have an internal light that shines through the objective but IMO neither are ideal. Kirby I have a dual LED gooseneck I use for illumination; sometimes I w...
by dtsh
Tue Jul 14, 2020 6:31 am
Forum: For forum members who want to buy and sell equipment
Topic: Wanted: AO Cycloptic barlow (cat 265, 266, 267) (FOUND)
Replies: 9
Views: 896

Re: Wanted: AO Cycloptic barlow (cat 265, 266, 267)

My initial toughts have been to design it much like the original 2x swingout. From what I can tell it looks to slide over the objective with the lens in a thinner section which pivots on a rod. Guessing said rod likely threads into the main housing, but many ways one can do it.
by dtsh
Mon Jul 13, 2020 9:12 pm
Forum: For forum members who want to buy and sell equipment
Topic: Wanted: AO Cycloptic barlow (cat 265, 266, 267) (FOUND)
Replies: 9
Views: 896

Re: Wanted: AO Cycloptic barlow (cat 265, 266, 267)

The Oculus is pretty interesting, I have a couple of approaches to try, none quite that complicated thankfully.
by dtsh
Mon Jul 13, 2020 4:05 pm
Forum: For forum members who want to buy and sell equipment
Topic: Wanted: AO Cycloptic barlow (cat 265, 266, 267) (FOUND)
Replies: 9
Views: 896

Wanted: AO Cycloptic barlow (cat 265, 266, 267) (FOUND)

I am primarily looking for cat 265, the 2x barlow. I need the lens elements to be in good shape, but the housing doesn't matter - even the threads can be mangled as it will be disassembled to be put into a custom made swing out barlow. I'd be interested in offers of other objective/barlows too, such...
by dtsh
Thu Jul 09, 2020 2:04 am
Forum: Pictures and Videos
Topic: Stomoxys with ticks?
Replies: 5
Views: 473

Re: Stomoxys with ticks?

I found 3 more, in my small sample size it looks like it's about 1 in 66 of the Stomoxys has these attached. One found tonight was quite heavily laden. I have these in 80% ETOH for later use. I find it interesting that these appear only on the Stomoxys flies, I have yet to see one on any of the othe...
by dtsh
Mon Jul 06, 2020 1:32 am
Forum: Pictures and Videos
Topic: Horsefly portrait
Replies: 5
Views: 465

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: 465

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: 5
Views: 473

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: 5
Views: 473

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: 802

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: 16
Views: 3654

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: 1358

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: 1987

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: 1798

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: 764

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: 12
Views: 2673

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: 12
Views: 2673

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: 8
Views: 1098

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: 1468

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: 729

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: 3231

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: 887

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: 1358

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: 1358

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: 1358

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: 3727

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: 1996

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...