Search found 710 matches

by BramHuntingNematodes
Sun Feb 28, 2021 2:08 am
Forum: Pictures and Videos
Topic: Nemotode
Replies: 2
Views: 61

Re: Nemotode

Yeah that goofy movement is characteristic of the nematode it has only longitudinal muscles and so is somewhat limited in its ability to move freely. It is difficult for me to get a good look at its head which is the most likely starting point for an ID I can't really even tell if the cuticle annula...
by BramHuntingNematodes
Sat Feb 27, 2021 6:35 am
Forum: Microscopes and optics
Topic: Epi-plan questions
Replies: 7
Views: 128

Re: Epi-plan questions

Zeiss has some very nice epi darkfield objectives that provide oblique illumination. They are the big chunky ones and sometimes are pretty affordable depending on the era they're from. I look at most anything with them, but that doesn't help you if you are trying to use objectives you already have. ...
by BramHuntingNematodes
Sat Feb 27, 2021 4:10 am
Forum: Microscopes and optics
Topic: Buy stereo microscope watchmaker
Replies: 19
Views: 1121

Re: Buy stereo microscope watchmaker

It's nice that stand is a real prize.
by BramHuntingNematodes
Sat Feb 27, 2021 4:07 am
Forum: For forum members who want to buy and sell equipment
Topic: Zeiss Inverted Scope
Replies: 4
Views: 345

Re: Zeiss Inverted Scope

The old invertoscop d is definitely a fun ittle scope I have put some 60s finite B&L phase stuff on there and it is a lot of fun thinking about putting some long working distance plan phase lenses I got on there try to match it with an old Tiyoda phase turret if you got short barrel objectives they'...
by BramHuntingNematodes
Fri Feb 26, 2021 9:00 pm
Forum: Introduce yourself
Topic: Hello! Help me with my new AO Microscope?
Replies: 4
Views: 82

Re: Hello! Help me with my new AO Microscope?

Very lovely scope there with some nice fat eyepieces. You are correct about it being phase, the finite tube variety I believe. That the numbers on the annulur and lens match is no coincidence! Phil can chime in too, but AO from this time had the best phase contrast engine going, with lots of options...
by BramHuntingNematodes
Fri Feb 26, 2021 12:36 am
Forum: Microscopes and optics
Topic: Finding a fingerprint
Replies: 2
Views: 74

Re: Finding a fingerprint

Usually if you see a fingerprint then it's on a part that's easy to get at. The top of many abbe condensers simply unscrews and allows access to lens surfaces . Cleaning is simple and condensers are generally robust. A fingerprint in the condenser shouldn't.show up whole viewing a specimen, but if i...
by BramHuntingNematodes
Thu Feb 25, 2021 7:32 pm
Forum: Home-made microscope adaptations
Topic: Have 3d printer, will print.
Replies: 15
Views: 252

Re: Have 3d printer, will print.

$50 to send a jar of mayo literally to the opposite end of the earth is still pretty good
by BramHuntingNematodes
Thu Feb 25, 2021 4:03 pm
Forum: Microscopes and optics
Topic: Hey Apo, you ever seen one like this? (B&L Phase lens with no phase ring?)
Replies: 6
Views: 127

Re: Hey Apo, you ever seen one like this? (B&L Phase lens with no phase ring?)

Thanks for the advice. I discussed our findings with the the guy and he found a phase plate inside a non-phase lens in the same pile of surplus and will send it. Maybe it's the right one or maybe not. Never can tell with these academic types. I may try some experimentation also. I tried punches in t...
by BramHuntingNematodes
Thu Feb 25, 2021 7:12 am
Forum: Beginner's corner
Topic: Help to decode my objectives specifications Thanks
Replies: 4
Views: 126

Re: Help to decode my objectives specifications Thanks

If you really want to is the very very smol an immersion lens might be good. A 60x na1.4 planapo is an extremely powerful lens. Just plan in immersion will get you more detail and be less finicky than a high dry.
by BramHuntingNematodes
Thu Feb 25, 2021 5:28 am
Forum: Illumination Techniques
Topic: Where's the white light?
Replies: 1
Views: 53

Re: Where's the white light?

If you have a very bright halogen bulb you end up with a surplus of flux that you can filter whatever undesirable frequencies from.

Some leds have completely decent distributions and appear very white.

I think some of the old fluorescent lights used in stereo scopes were pretty ok.
by BramHuntingNematodes
Thu Feb 25, 2021 4:16 am
Forum: Microscopes and optics
Topic: Hey Apo, you ever seen one like this? (B&L Phase lens with no phase ring?)
Replies: 6
Views: 127

Re: Hey Apo, you ever seen one like this? (B&L Phase lens with no phase ring?)

Hey now that you mention it though I looked it up and the 47.5 apo I got from the auctions was from the treasure trove. It works a treat.
by BramHuntingNematodes
Thu Feb 25, 2021 4:02 am
Forum: Microscopes and optics
Topic: Hey Apo, you ever seen one like this? (B&L Phase lens with no phase ring?)
Replies: 6
Views: 127

Re: Hey Apo, you ever seen one like this? (B&L Phase lens with no phase ring?)

Naw I bought it from a guy. Came from university surplus, so the tampering explanation makes much more sense than the exotic experimental prototype explanation, unfortunately. Breaks my heart a little, but I already have two BF flat field lenses in fine shape and I don't need another one. Guess I'll...
by BramHuntingNematodes
Wed Feb 24, 2021 9:54 pm
Forum: Microscopes and optics
Topic: Hey Apo, you ever seen one like this? (B&L Phase lens with no phase ring?)
Replies: 6
Views: 127

Hey Apo, you ever seen one like this? (B&L Phase lens with no phase ring?)

Image
Image

I can't find a trace of the phase ring. Was it removed? Can it be buffed out?
by BramHuntingNematodes
Tue Feb 23, 2021 5:05 am
Forum: Microscopes and optics
Topic: A small tip for users of Bausch & Lomb.
Replies: 7
Views: 136

Re: A small tip for users of Bausch & Lomb.

The eyelash problem never goes away!
by BramHuntingNematodes
Tue Feb 23, 2021 5:02 am
Forum: Illumination Techniques
Topic: Phase Contrast Question
Replies: 5
Views: 193

Re: Phase Contrast Question

Not sure what your use case is but I would go with the phase system. Rather than an incremental correction to the bright field image it transforms phase differences into amplitude differences it's like a kind of magic. Also, the condenser can be used for COL and sometimes darkfield. Halos are useful...
by BramHuntingNematodes
Tue Feb 23, 2021 4:38 am
Forum: Microscopes and optics
Topic: A small tip for users of Bausch & Lomb.
Replies: 7
Views: 136

Re: A small tip for users of Bausch & Lomb.

Thanks for bringing this up again apo. I recall you mentioning some time back, and I have an objective that could really use some adjusting.
by BramHuntingNematodes
Sat Feb 20, 2021 6:21 am
Forum: Microscopes and optics
Topic: Cleaning Microscope Lens? Help wanted
Replies: 3
Views: 141

Re: Cleaning Microscope Lens? Help wanted

I like one part rubbing alcohol to two parts distilled water and a few drops of dish soap every pint or so. Don't rub lenses with a dry.cloth, try not to rub too much generally. Try blowing air first if nothing else to get the loose stuff out. Bausch suggested laundered linen cloth, perhaps because ...
by BramHuntingNematodes
Thu Feb 18, 2021 1:25 am
Forum: Beginner's corner
Topic: Bausch & Lomb alignment possible?
Replies: 4
Views: 107

Re: Bausch & Lomb alignment possible?

Yeah the grease they used does lock up pretty hard sometes. I got it bad on two interpupillary adj. mechanism. The lazy way to.do it is to drop a little turbine oil in the joints and work the mechanism back and forth until it loosens up. Otherwise you can take the whole thing apart and clean it good...
by BramHuntingNematodes
Wed Feb 17, 2021 9:09 pm
Forum: Beginner's corner
Topic: Bausch & Lomb alignment possible?
Replies: 4
Views: 107

Re: Bausch & Lomb alignment possible?

I use a Dynazoom all the time; have taken apart and put it back together again. Maybe a picture or two would help.
by BramHuntingNematodes
Wed Feb 17, 2021 4:54 am
Forum: Miscellaneous
Topic: Recommendations for a cheap...
Replies: 19
Views: 798

Re: Recommendations for a cheap...

Very nice. I haven't had much hands on experience with Spencer or AO stuff, but I really enjoyed the older threads about your #5 and reading what I can about them.
by BramHuntingNematodes
Tue Feb 16, 2021 1:31 pm
Forum: Microscopes and optics
Topic: How to disassembly adjustable eye tube of Bausch & Lomb Dynoptic inclined binocular body "T"?
Replies: 26
Views: 1425

Re: How to disassembly adjustable eye tube of Bausch & Lomb Dynoptic inclined binocular body "T"?

B&L mirrors are flat in one side and concave on the other. The concave side is only for low magnifications, 10x or less usually. You would be fine using only the flat mirror for a phase contrast microscope.
by BramHuntingNematodes
Tue Feb 16, 2021 1:06 am
Forum: Microscopes and optics
Topic: On the subject of macroscopes, the B&L/ Leica Monozoom 7
Replies: 2
Views: 72

On the subject of macroscopes, the B&L/ Leica Monozoom 7

These get no love on the Microbe Hunter site, probably because you can scarcely find any documentation. The fact they are pretty evenly split between older Bausch and Lomb's and newer Leica scopes doesn't help. I think what they are is essentially a single viewing path of a SZ7, with a nice kit of v...
by BramHuntingNematodes
Mon Feb 15, 2021 5:34 pm
Forum: Miscellaneous
Topic: Recommendations for a cheap...
Replies: 19
Views: 798

Re: Recommendations for a cheap...

If you can believe it, those three are three different Spencer scopes with app lenses, one of which with a circular stage, than the first three I was thinking of which all sold Feb 8. But point well taken. Learning about the production of these old instruments is a big part of the hobby if you don't...
by BramHuntingNematodes
Mon Feb 15, 2021 4:27 am
Forum: Specimens, samples and slides
Topic: Will these melt paraffin wax?
Replies: 9
Views: 367

Re: Will these melt paraffin wax?

Oh the other advantage of heat from above is that you can just melt the top of the wax and the sample will drop to where the.wax is right at the melting temperature.
by BramHuntingNematodes
Mon Feb 15, 2021 4:25 am
Forum: Specimens, samples and slides
Topic: Will these melt paraffin wax?
Replies: 9
Views: 367

Re: Will these melt paraffin wax?

If you have an incandescent light bulb and an adjustable lamp a 60w will melt a whole big jam jar of the stuff just put it close
by BramHuntingNematodes
Mon Feb 15, 2021 1:21 am
Forum: Microscopes and optics
Topic: How to disassembly adjustable eye tube of Bausch & Lomb Dynoptic inclined binocular body "T"?
Replies: 26
Views: 1425

Re: How to disassembly adjustable eye tube of Bausch & Lomb Dynoptic inclined binocular body "T"?

Probably a mirror and one of the good illuminators. My example from UGA had a mirror, for instance.
by BramHuntingNematodes
Sat Feb 13, 2021 7:09 am
Forum: Pictures and Videos
Topic: Snow flake photography - post your pictures!
Replies: 19
Views: 1335

Re: Snow flake photography - post your pictures!

Bustin out the old fieldmaster nice to see it in action here pretty sharp for such a long exposure on top of this sort of scaffold
by BramHuntingNematodes
Sat Feb 13, 2021 1:37 am
Forum: Collecting microscopes and slides
Topic: Dating a vintage microscope?
Replies: 6
Views: 830

Re: Dating a vintage microscope?

Some of those older japanese toys do an adequate job particularly in the 100-300x range. Just stay away from the 20x eyepiece if it has one.
by BramHuntingNematodes
Fri Feb 12, 2021 2:47 am
Forum: Microscopes and optics
Topic: How to disassembly adjustable eye tube of Bausch & Lomb Dynoptic inclined binocular body "T"?
Replies: 26
Views: 1425

Re: How to disassembly adjustable eye tube of Bausch & Lomb Dynoptic inclined binocular body "T"?

You some pretty good teardown pictures here for future reference. I don't think I ever took my fine focus apart that far. I do recall the action being the slightest bit tricky to reset properly. Persistence paid off
by BramHuntingNematodes
Sun Feb 07, 2021 3:24 pm
Forum: Microscopes and optics
Topic: Mad Scientist Glasses
Replies: 8
Views: 566

Re: Mad Scientist Glasses

neat I'm always on the lookout for a good set of loupes

2 to 4 inches working distance is pretty typical for a stereo scope although this can be changed to some extent with auxiliary lenses