Search found 3502 matches

by apochronaut
Wed Sep 30, 2020 1:51 pm
Forum: Beginner's corner
Topic: Inexpensive complete Balplan on ebay.
Replies: 14
Views: 681

Re: Inexpensive complete Balplan on ebay.

Some of the older 20X look brown. Possibly they were or the ring is just dirty or faded over time.
by apochronaut
Wed Sep 30, 2020 1:47 pm
Forum: Microscopes and optics
Topic: Stereozoom 7 zoom disassembly
Replies: 4
Views: 56

Re: Stereozoom 7 zoom disassembly

It is a 1.3mm by my memory but I have only taken those branded Bausch & Lomb apart. It wouldn't seem the sort of thing to change unless it was prone to stripping and they upped it to 1.5 or something like that.
1.3mm is .51 thou. The imperial equivalent is the fairly odd .50 thou., which is 1.27mm.
by apochronaut
Tue Sep 29, 2020 2:53 pm
Forum: Beginner's corner
Topic: New Scope Swift 380T
Replies: 4
Views: 74

Re: New Scope Swift 380T

Difficulty obtaining focus with higher magnifications is usually due to something blocking the objective from moving into it's focal range. This could be because there is an adjustable focus stop, a safety mechanism designed to stop the user from over focusing and driving the objective into the slid...
by apochronaut
Mon Sep 28, 2020 10:11 pm
Forum: Beginner's corner
Topic: Inexpensive complete Balplan on ebay.
Replies: 14
Views: 681

Re: Inexpensive complete Balplan on ebay.

I am very, very glad that someone finally bought that. It sat for a while. Congratulations. That is a life time purchase. answering a couple of your questions. Having the 2.5X objective and the flip top condenser is a real bonus. That was an expensive duo. The flip top can be left down for the 10X, ...
by apochronaut
Mon Sep 28, 2020 11:34 am
Forum: Beginner's corner
Topic: focus tension adjustment
Replies: 2
Views: 59

Re: focus tension adjustment

Sounds like the fine focus is drifting a little , so it seems it would be loose. You might contact Bresseur about how to increase tension, or it should point that out in a user's manual.
by apochronaut
Mon Sep 28, 2020 11:31 am
Forum: Microscopes and optics
Topic: Lafayette 1500x manual
Replies: 7
Views: 114

Re: Lafayette 1500x manual

That 1500X one was almost for sure made by Kyowa. I have seen it before with another name on it but the fittings, base and machinings are all Kyowa. It was quite heavily built and sported an unusual 75X dry R.M.S. objective. It was not the manufacturers who chose the design principals for the micros...
by apochronaut
Mon Sep 28, 2020 10:50 am
Forum: My microscope
Topic: Cleaning mirrors in objectives of AO 570 stereoscope
Replies: 17
Views: 182

Re: Cleaning mirrors in objectives of AO 570 stereoscope

The mirrors could be replaced but it is a lot of fuss and the results entirely dependent on that fuss being executed with perfection. A perfect fuss is better than no fuss but no fuss is better than an imperfect fuss. I don't know who said that but whoever said it, they were half asleep. That's why ...
by apochronaut
Mon Sep 28, 2020 12:35 am
Forum: My microscope
Topic: Cleaning mirrors in objectives of AO 570 stereoscope
Replies: 17
Views: 182

Re: Cleaning mirrors in objectives of AO 570 stereoscope

If the spots you are referring to are similar to certain ones I have run across , then I don't think they will come off. Those I am familiar with are usually roundish and a dull silver colour, maybe 1/8" and usually towards the edge. I think it is oxidation of the first surface coating, reducing ref...
by apochronaut
Sun Sep 27, 2020 10:04 pm
Forum: Beginner's corner
Topic: Which is best?
Replies: 3
Views: 146

Re: Which is best?

I'm guessing you are a student or recently graduated? The optical qualities that the major microscope manufacturers offer are always pretty competetive, so if the priceing is more or less equal, I would give a nod to the Nikon in terms of the economics of your optical package, simply due to the curr...
by apochronaut
Sun Sep 27, 2020 6:02 pm
Forum: Microscopes and optics
Topic: Lafayette 1500x manual
Replies: 7
Views: 114

Re: Lafayette 1500x manual

In the 1950's, the Japanese evolved a sort of standardized series of microscope optics, descending from R.M.S. Eyepieces were in 2mm increments of 19,17 and 15mm. Objectives , from maybe even down to 13mm with the very best being R.M.S. These were used to build a series of hobby microscopes based on...
by apochronaut
Fri Sep 25, 2020 11:38 am
Forum: Pictures and Videos
Topic: Comparative sizes of bacteria and ciliate
Replies: 5
Views: 126

Re: Comparative sizes of bacteria and ciliate

Thats nothin' . I saw some in a Japanese movie once that were way bigger than those .
by apochronaut
Thu Sep 24, 2020 12:54 pm
Forum: Home-made microscope adaptations
Topic: Microstar IV Analyzer
Replies: 4
Views: 155

Re: Microstar IV Analyzer

That is also very neat and tidy. Looks like original equipment.
by apochronaut
Thu Sep 24, 2020 12:52 pm
Forum: Home-made microscope adaptations
Topic: Microstar IV Camera Adapter
Replies: 5
Views: 114

Re: Microstar IV Camera Adapter

That's a really nice settup, Brian. It looks like you are using it afocally?
by apochronaut
Thu Sep 24, 2020 12:50 pm
Forum: Home-made microscope adaptations
Topic: Microstar IV Camera Adapter
Replies: 5
Views: 114

Re: Microstar IV Camera Adapter

Beautiful work, I think 3D-printed designs often look haphazard and poorly-thought-out because of the lack of constraints, but it is clear you have put a lot of effort into designing around the strengths and weaknesses of 3D printing. What size Phillips bit are you using for those set screws in the...
by apochronaut
Thu Sep 24, 2020 2:09 am
Forum: For forum members who want to buy and sell equipment
Topic: A.O. dark/phase objectives wanted
Replies: 6
Views: 362

Re: A.O. dark/phase objectives wanted

I'm sending a link to something that may be of interest.
by apochronaut
Thu Sep 24, 2020 2:00 am
Forum: Microscopes and optics
Topic: Illumination for series 20 dark phase contrast
Replies: 3
Views: 70

Re: Illumination for series 20 dark phase contrast

Almost a year ago I purchased a nice series 20 by American Optical. Over time I purchased the correct accessories for dark phase operation. I have gone through the manual and set everything up according to factory recommendations. Using a 10x bright fielld objective and no filters in the carousel I...
by apochronaut
Wed Sep 23, 2020 9:28 pm
Forum: Microscopes and optics
Topic: Reichert Diastar 420 coarse focus problem
Replies: 46
Views: 571

Re: Reichert Diastar 420 coarse focus problem

There used to be a hobby kit, with 1 tube of damping grease and 1 vial each of a light viscosity and heavy viscosity oil. Was originally quite cheap at around 20.00, maybe 25. It was discontinued. I called TAI and they had a few left, about a year ago. 39.00 I think it was.
by apochronaut
Wed Sep 23, 2020 4:26 pm
Forum: Beginner's corner
Topic: Advice on decent microscope for aquatic samples
Replies: 14
Views: 372

Re: Advice on decent microscope for aquatic samples

Unfortunately, two individuals might see the pros and cons of various designs somewhat differently. A different experience and length of experience might infuse such a guide with a different perspective. It isn't all cut and dried and destined to be carved in stone. All microscopes have pros and con...
by apochronaut
Wed Sep 23, 2020 12:58 pm
Forum: Microscopes and optics
Topic: Reichert Diastar 420 coarse focus problem
Replies: 46
Views: 571

Re: Reichert Diastar 420 coarse focus problem

I am also curious about silicone greases like Molykote 111 you mention. I have a tube of it for underwater-mateable electrical connectors and it does seem like it would give a nice feel on mechanisms. I have not tried it yet though because I remember seeing some general recommendations against usin...
by apochronaut
Wed Sep 23, 2020 12:46 pm
Forum: Resources (online, books etc.)
Topic: Alva H. Bennett - Phase Microscopy; Principles and Applications
Replies: 5
Views: 147

Re: Alva H. Bennett - Phase Microscopy; Principles and Applications

The hardcover should be available through Abe Books.. I bought one for 8.00 and it came from England, of all places.
The book dates from the late 40's , when the AO labs were heavily into the potential of phase.
by apochronaut
Wed Sep 23, 2020 12:30 pm
Forum: Beginner's corner
Topic: Advice on decent microscope for aquatic samples
Replies: 14
Views: 372

Re: Advice on decent microscope for aquatic samples

Unfortunately, the best way to buy a microscope is to do it based on price. Target a price and look for the best instrument you can find at that price, irregardless of brand. Buying based on a guide can encourage you to overlook otherwise excellent microscopes in favour of a brand , as though the br...
by apochronaut
Tue Sep 22, 2020 6:20 pm
Forum: Specimens, samples and slides
Topic: Bacterial behaviour.
Replies: 6
Views: 153

Re: Bacterial behaviour.

I can and will recreate the conditions underwhich that particular obstacle negotiating behaviour took place, as long as I am able to maintain that creek sample fairly stable. At that time I will probably video it ; if all goes well. Gliding bacteria are one of my favourite subjects. They seem to be ...
by apochronaut
Mon Sep 21, 2020 11:53 am
Forum: My microscope
Topic: AO 570 stereo star zoom , cleaning and maintenance
Replies: 9
Views: 211

Re: AO 570 stereo star zoom , cleaning and maintenance

Brown and Smudge keep touring, despite their age. They were in my area recently. The amazing thing about them is that they can still get down to those low notes, just as in the past. Hazy , occasionally joins them still but they don't do those employee benefit shows in Oberkochen anymore and those r...
by apochronaut
Fri Sep 18, 2020 12:19 pm
Forum: Microscopes and optics
Topic: Reichert Diastar 420 coarse focus problem
Replies: 46
Views: 571

Re: Reichert Diastar 420 coarse focus problem

You have to be careful with the colours. The earliest versions had a black arm cap and then Leica branded ones at the end too.
by apochronaut
Fri Sep 18, 2020 12:08 pm
Forum: Specimens, samples and slides
Topic: Bacterial behaviour.
Replies: 6
Views: 153

Re: Bacterial behaviour.

The gliding bacteria is most likely a species of flavobacteria. It moves at about 10 um/sec., probably faster mostly. It is hard to detect but there may be a type of corkscrew motion associated with the undulating or swimming motion. The thing is, due to it's small diameter of only about 2 um, unlik...
by apochronaut
Fri Sep 18, 2020 2:35 am
Forum: Specimens, samples and slides
Topic: Bacterial behaviour.
Replies: 6
Views: 153

Bacterial behaviour.

Increasinhly I find myself more interested in the behaviour of micro-organisms than the splendour of their structure. It is difficult to imagine cognizance in such tiny bodies yet here I relate two recent phenomena. Part of my microscopy involves a frequent return to certain creeks, with an eye to l...
by apochronaut
Thu Sep 17, 2020 1:25 pm
Forum: Microscopy accessories
Topic: 23mm diameter 10x/22 eyepieces (!)
Replies: 19
Views: 1136

Re: 23mm diameter 10x/22 eyepieces (!)

The Chinese planned economy is quite good at maximizing resources. As Scarodactyl showed, the tube extension can easily be exchanged for a 30mm version and a field stop of any diameter one chooses could be installed up to at least 25mm. Looks like they are used in the tier 2 Chinese scopes that carr...
by apochronaut
Wed Sep 16, 2020 5:39 pm
Forum: Microscopy accessories
Topic: 23mm diameter 10x/22 eyepieces (!)
Replies: 19
Views: 1136

Re: 23mm diameter 10x/22 eyepieces (!)

A lot of telescope enthusiasts get kind of dumb ass around microscope eyepieces, due to the strong association between telescope performance and the type of eyepiece employed. As a result, astronomical eyepiece terminology gets tossed around related to microscope eyepieces when it isn't really relev...
by apochronaut
Wed Sep 16, 2020 11:55 am
Forum: Microscopes and optics
Topic: Balplan DIC Lenses
Replies: 3
Views: 113

Re: Balplan DIC Lenses

Probably has a lot to do with the effect the common telescope lens has on the system. The common lens does do some correcting likely ; probably field flattening plus some peripheral ca. It also is the final magnifier in the system by about 5X and contributes to sending the ray bundle to the telan le...
by apochronaut
Tue Sep 15, 2020 11:38 pm
Forum: Microscopes and optics
Topic: Watson and Sons Stereo with obtuse irreversible design?
Replies: 6
Views: 155

Re: Watson and Sons Stereo with obtuse irreversible design?

Of course the boom stand was made by Watson. That doesn't mean that your microscope belongs on it. Just because it is all black and the modular components fit together doesn't mean they belong together. The black stuff is called paint. Did you even look at the alternate boom stand design , i linked ...