Search found 1173 matches

by PeteM
Sun Sep 20, 2020 5:15 am
Forum: Beginner's corner
Topic: Need help in buying first "used" microscope.
Replies: 4
Views: 88

Re: Need help in buying first "used" microscope.

+1 I agree with Tom. The BH2 is a good scope. That one looks complete, with decent DPlan objectives, and fairly priced. If you want to dig deeper, send a PM when you can and I can send you a PDF guide to various microscope brands and models. Depending upon what you want to look at, it's possible you...
by PeteM
Sat Sep 19, 2020 9:15 pm
Forum: Pictures and Videos
Topic: Bacteria Massing at the Biofilm
Replies: 3
Views: 56

Re: Bacteria Massing at the Biofilm

Don - cool image. Can you tell us a bit more about the preparation? I'm assuming a 100x objective - but the source of the biofilm bubble and the bacteria?? Any change over a day or so?
by PeteM
Fri Sep 18, 2020 4:31 pm
Forum: For forum members who want to buy and sell equipment
Topic: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube
Replies: 22
Views: 307

Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

There's also the option of using the same 10x eyepiece and shooting with your camera through it if you have a permanent setup. If you have a tripod or copy stand you could get try that. While this adds some extra glass, it also isolates the camera from the scope to reduce vibration and might give yo...
by PeteM
Fri Sep 18, 2020 6:20 am
Forum: Microscopes and optics
Topic: Reichert Diastar 420 coarse focus problem
Replies: 13
Views: 123

Re: Reichert Diastar 420 coarse focus problem

The good news is that your cam isn't broken. You're likely right that it's hardened grease. I find a spout top can of lighter fluid a good solution for applying small amounts of a not-too-hazardous solvent. Loose the old stuff, pick out the hardened grease from racks and gears with a toothpick and s...
by PeteM
Fri Sep 18, 2020 4:57 am
Forum: Microscopes and optics
Topic: Reichert Diastar 420 coarse focus problem
Replies: 13
Views: 123

Re: Reichert Diastar 420 coarse focus problem

Recollection is that you can take the lid off the top (screws under plugs) and get a view down into the focusing mechanism and see if the plastic cam down inside is broken. That could be your problem. The upper arm of the scope (its retract mechanism) rests on that plastic cam. It doesn't like to be...
by PeteM
Fri Sep 18, 2020 12:20 am
Forum: Beginner's corner
Topic: Can I buy difference lenses?
Replies: 1
Views: 55

Re: Can I buy difference lenses?

Let us know which brand and model microscope you have and we can let you know which objectives might be compatible. Generally, you want to stick with 10x eyepieces, 15x at most. A 60-63xx objective is commonly available with most brands. A 250x objective very unusual - it would normally lead to "emp...
by PeteM
Fri Sep 18, 2020 12:07 am
Forum: Pictures and Videos
Topic: Photomicrograph Shirt
Replies: 6
Views: 108

Re: Photomicrograph Shirt

Curious, Don, if you're finding it an unexpected aid to "social distancing" -- or if people get closer and try to figure out / ask what it is?

Here's the T-shirt for one of our "Micronaut" programs. Sugar crystals image courtesy of an Italian researcher.
by PeteM
Wed Sep 16, 2020 8:55 pm
Forum: For forum members who want to buy and sell equipment
Topic: Zeiss Universal with many extras-Sold
Replies: 2
Views: 141

Re: Zeiss Universal with many extras

That's a lot of scope for the money - hope someone here snaps it up. Near a work of art as well.

For those near Dallas - even better if someone can pick it up or it ships a shorter distance.

Good luck wherever your new place will be.
by PeteM
Wed Sep 16, 2020 5:11 am
Forum: For forum members who want to buy and sell equipment
Topic: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube
Replies: 22
Views: 307

Re: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube

If you haven't tried the second seller, newhoper, could be they'll be more immediately responsive? I haven't bought from him (her?) but they've offered a wide range for years, usually well documented.
by PeteM
Wed Sep 16, 2020 4:56 am
Forum: For forum members who want to buy and sell equipment
Topic: Looking for NFK 2.5x LD relay lens and Olympus OM L phototube
Replies: 22
Views: 307

Re: Looking for NFK 2.5x LD photo eyepiece and Olympus OM L phototube

No personal experience, M, with this seller or product; but it looks like an affordable solution. You'll still need the relay lens: https://www.ebay.com/itm/Olympus-OM-mount-to-BH2-BX-Microscope-DSLR-Camera-OM-type-tube-adapter/193369188526?hash=item2d05b3a8ae:g:M9EAAOSwMTFeEk6c This seller speciali...
by PeteM
Tue Sep 15, 2020 1:05 am
Forum: Illumination Techniques
Topic: Epi DIC woes
Replies: 59
Views: 6614

Re: Epi DIC woes

FWIW, the bulb location (inside the lamp house) wasn't my problem. For this particular illuminator all that seemed to affect was the brightness achieved on the stage; not the double iris image. It was the centratiion (three screws) closes to where the illuminator tube enters the epi intermediate ada...
by PeteM
Mon Sep 14, 2020 8:52 pm
Forum: Illumination Techniques
Topic: Epi DIC woes
Replies: 59
Views: 6614

Re: Epi DIC woes

Stephen, I was checking out an Olympus reflected DIC setup today, using infinity MSPlans rather than NeoSplans, and noticed a double image of the field diaphragm. Most of this could be eliminated by realigning the illuminator tube. There are three setscrews for centration at two locations back on th...
by PeteM
Sat Sep 12, 2020 8:24 pm
Forum: For forum members who want to buy and sell equipment
Topic: Selling Olympus E 1958 trinocular incident/transmitted
Replies: 1
Views: 110

Re: Selling Olympus E 1958 trinocular incident/transmitted

Just a comment on that scope. We use them in our Micronaut program for things like silicon wafers and they truly are a lovely microscope. Surprisingly good images and with the darkfield and polarization options. Reflected DIC can be fitted. The main drawback of these compared to a modern and more ex...
by PeteM
Thu Sep 10, 2020 8:34 pm
Forum: Microscopy accessories
Topic: Adapter to mount B&L StereoZoom Pod to AO StereroStar stand?
Replies: 5
Views: 145

Re: Adapter to mount B&L StereoZoom Pod to AO StereroStar stand?

Pretty sure the hole in an A.O. stand (98mm hole?) is too small to handle the B&L body (more than 4" across the squarish shaped diagonal??). So a 3D printed adapter that slips in probably won't work or, if it just barely fits, won't have much "meat." $60 might get you a B&L bare stand on Ebay or a d...
by PeteM
Tue Sep 08, 2020 8:19 pm
Forum: Beginner's corner
Topic: Microscope for engine oil analysis
Replies: 43
Views: 1315

Re: Microscope for engine oil analysis

I was wondering about all that copper, silver, and cadmium . . . . There are a few more tools I'd like to have as well - but seems my dear wife doesn't think we need either a backhoe or an XRF spectrometer. I did buy up 1/2" diameter rods of a dozen grades of steel to use for spark test comparisons ...
by PeteM
Tue Sep 08, 2020 4:37 pm
Forum: Beginner's corner
Topic: Microscope for engine oil analysis
Replies: 43
Views: 1315

Re: Microscope for engine oil analysis

Bob - what a fantastic presentation. Almost makes me want to mow the lawn, then check the oil . . .
by PeteM
Mon Sep 07, 2020 6:36 am
Forum: Beginner's corner
Topic: Which to choose?
Replies: 7
Views: 336

Re: Which to choose?

Congrats. There's a much longer story with the 20x Nikon Plan Apo. It's a 60mm parfocal objective with a 25mm thread. Your Leitz objectives are 45mm with a 25mm thread. The way I've used a DMLS to host Nikon objectives in the past is to put all 60mm Nikon objectives (and a Nikon head) on it OR to pu...
by PeteM
Sun Sep 06, 2020 3:56 am
Forum: Beginner's corner
Topic: Which to choose?
Replies: 7
Views: 336

Re: Which to choose?

Some quick thoughts, Chris: 1) It would help to know more about what you want to see, how important photos wil be, and so on. 2) AmScope isn't a bad value for a new microscope, but not sure I'd consider it a 20 year microscope. Not many upgrade options, etc. 3) For that money I'd expect a newer Leit...
by PeteM
Sat Sep 05, 2020 10:41 pm
Forum: Microscopes and optics
Topic: Microscope Maintenance
Replies: 25
Views: 1218

Re: Microscope Maintenance

The stuff Zeiss opticians sell is just distilled water and about 5% IPA (no detergent, as in ROR etc.): http://lkstevens-wa.safeschoolssds.com/document/repo/a3a90286-4531-42b1-baba-506b41eb5db5 The formula Zeiss recommended for clearing oxidized immersion oil etc. is 85% petroleum ether and 15% IPA ...
by PeteM
Sat Sep 05, 2020 9:18 pm
Forum: Microscopes and optics
Topic: Microscope Maintenance
Replies: 25
Views: 1218

Re: Microscope Maintenance

With respect to Dawn (which I also like) here are the ingredients P&G lists: https://www.pg.com/productsafety/msds/professional_line/professional_line/Dawn_Professional_Dish_Detergent.pdf FWIW, Dawn is also the poor man's surfactant to use when fighting fires. Don't know about the citrus cleaners, b...
by PeteM
Sat Sep 05, 2020 8:19 pm
Forum: Microscopes and optics
Topic: Microscope Maintenance
Replies: 25
Views: 1218

Re: Microscope Maintenance

Thanks, Wes & Hobbyist.
by PeteM
Sat Sep 05, 2020 7:14 pm
Forum: Microscopes and optics
Topic: Microscope Maintenance
Replies: 25
Views: 1218

Re: Microscope Maintenance

I've had pretty good luck with "ROR" (Residual Oil Remover) lens cleaner. MSDS on it shows a tiny bit of ammonia (.775%), a fair small amount (just over 4%) of isopropyl alcohol, 9% soaps (maybe the same as above), distilled water, and a tiny bit of sodium chloride. The salt is a puzzle to me. Does...
by PeteM
Sat Sep 05, 2020 6:20 pm
Forum: Microscopes and optics
Topic: Microscope Maintenance
Replies: 25
Views: 1218

Re: Microscope Maintenance

I've had pretty good luck with "ROR" (Residual Oil Remover) lens cleaner. MSDS on it shows a tiny bit of ammonia (.775%), a fair small amount (just over 4%) of isopropyl alcohol, 9% soaps (maybe the same as above), distilled water, and a tiny bit of sodium chloride. The salt is a puzzle to me. Doesn...
by PeteM
Sat Sep 05, 2020 7:06 am
Forum: Beginner's corner
Topic: Should I get a new Motic BA400?
Replies: 9
Views: 297

Re: Should I get a new Motic BA400?

Roham -- I think the ideal for you might be a system microscope with a removable nosepiece and both brightfield and epi possibilities. The epi scope with long working distance objectives would be a natural extenson of macro photography. The transmitted capability adds a new dimension. Unless you pla...
by PeteM
Sat Sep 05, 2020 3:58 am
Forum: Beginner's corner
Topic: Should I get a new Motic BA400?
Replies: 9
Views: 297

Re: Should I get a new Motic BA400?

Roham, if you can find a new Motic BA400 with a trinocular head and plan phase objectives and Zernicke type condenser for $700, you're not likely to do much better used. I'm curious, myself, to know who is closing those out at this price? A dealer usually wants significantly more. That BA400 is one ...
by PeteM
Fri Sep 04, 2020 8:07 am
Forum: Beginner's corner
Topic: Should I get a new Motic BA400?
Replies: 9
Views: 297

Re: Should I get a new Motic BA400?

If they're plan infinity phase objectives and the condenser is the rotating type ("Zernicke") that would be a good price for a pretty good quality import microscope. A pristine used "big four" microscope might be a bit better, but probably not easily found (and found all together) at that price.
by PeteM
Wed Sep 02, 2020 4:22 pm
Forum: Beginner's corner
Topic: Improvement of a microscope or buying a new one?
Replies: 4
Views: 220

Re: Improvement of a microscope or buying a new one?

A few more thoughts. That looks to be a reflected light only microscope. Fine for many structures. From the photos -- I'm not sure it has a lower lamp and condenser? I see a slide on the stage and a transmitted type stage, but (from the pictures provided) am not sure there is a lamp house (or place ...
by PeteM
Tue Sep 01, 2020 7:56 pm
Forum: Microscopes and optics
Topic: Nikon Plan 50 160/- Oil Objective
Replies: 4
Views: 167

Re: Nikon Plan 50 160/- Oil Objective

Dale, It's an excellent objective for use with oil - one that ought to be on more Labophots and Optiphots. High numerical aperture, a nice plan view, and a bit more working distance than a 100x. It won't complain about being enlarged to 850x magnification. And the iris is a plus for darkfield imagin...