Search found 962 matches

by Scarodactyl
Wed Sep 30, 2020 4:27 pm
Forum: Microscopes and optics
Topic: Stereozoom 7 zoom disassembly
Replies: 4
Views: 56

Re: Stereozoom 7 zoom disassembly

Thry made some changes to the eyepiece tubes at some point to make them like the ones on the updated sz4/sz6. I've seen a couple on sz7s but mostly the gz7. They didn't change much even on that one, hefty esd plastic body instead of metal, new eye tubes and cooler looking zoom knob. Oh, and thry use...
by Scarodactyl
Mon Sep 28, 2020 12:21 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 that's the case, I would first put it back together and see if it actually has a significant effect on the image through the eyepieces.
by Scarodactyl
Sun Sep 27, 2020 11:43 pm
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

One time I ran into a head which had some weird, hardened brown grease on some of the prisms (with fingerprints in). Alchohol wouldn't touch it. I had to resort to very careful application of acetone which did the trick, but I suspect if you used that in an AO head the mirrors would have a good chan...
by Scarodactyl
Sat Sep 26, 2020 8:29 pm
Forum: Microscopes and optics
Topic: Nikon and Wild heads
Replies: 7
Views: 149

Re: Nikon and Wild heads

I think the s series heads were like .5mm smaller than labophot series. I had to modify a rafcamera s series dovetail adapter to make it fit my labophot series head.
by Scarodactyl
Fri Sep 25, 2020 12:42 am
Forum: Specimens, samples and slides
Topic: How to remove fungus from 100 year old diatom slides
Replies: 3
Views: 114

Re: How to remove fungus from 100 year old diatom slides

For avoiding future growth keeping them away from fungus-promoting environments might be sufficient. Mold spores are everywhere, you just have to make sure they don't get a nice humid environment (helped by temperature swings causing condensation).
by Scarodactyl
Thu Sep 24, 2020 11:32 pm
Forum: Home-made microscope adaptations
Topic: Microstar IV Analyzer
Replies: 4
Views: 155

Re: Microstar IV Analyzer

That's stunning. Rotating intermediate polarizers tend to be pretty darned expensive and scarce on the secondary market--I've been iterating a design for one for my z6 but nothing nearly as beautiful or intricate as this.
by Scarodactyl
Thu Sep 24, 2020 7:05 pm
Forum: Microscopes and optics
Topic: Thoughts on filling/reforming stage rack with epoxy?
Replies: 8
Views: 183

Re: Thoughts on filling/reforming stage rack with epoxy?

Yeah, I say you should absolutely try this, not because of a high chance of success (probably not) but because I really want to see what happens.
by Scarodactyl
Tue Sep 22, 2020 1:58 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: 24
Views: 401

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

I guess I can't complain, since universities not worrying about cost generates a lot of my favorite surplus deals.
by Scarodactyl
Mon Sep 21, 2020 2:50 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

Thry're not too hard to open up just using a screwdriver, and cleaning the lenses is straightforward with q tips. I don't remember the exact procedure for a stereo star but it was not difficult. Don't feel too intimidated, as long as you are gentle jn cleaning this isn't a risky procedure.
by Scarodactyl
Sat Sep 19, 2020 11:55 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: 24
Views: 401

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

Martin adapters are cool and all but I don't think there's ever a good reason to pay 500 dollars for a third party camera adapter.


Good point on the 15x--relative corrections won't matter much either since the periphery is already cropped off, if one can live with the smaller FoV.
by Scarodactyl
Fri Sep 18, 2020 6:45 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: 24
Views: 401

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

Normal viewing eyepieces will not sit low enough in a bh2 trinoc port, and aren't as well corrected as the photo eyepieces anyway alas.
by Scarodactyl
Wed Sep 16, 2020 5:16 am
Forum: Microscopes and optics
Topic: Balplan DIC Lenses
Replies: 3
Views: 113

Re: Balplan DIC Lenses

Ah, I was wondering about that. I guess it makes particular sense since this seems likely to have been a later addition to the system rather than something planned from the start. How did you like the results of this system after your initial testing, by the way? I have thought about seeking one out...
by Scarodactyl
Tue Sep 15, 2020 9:30 pm
Forum: Microscopy accessories
Topic: Add a ring light?
Replies: 10
Views: 246

Re: Add a ring light?

I'll look forward to hearing how the S9 does for you! It's less an issue of absolute temperature as relative temperature (quick shock or having one side warmer than the other). This can already be an issue on some gemological microscopes with an in-base halogen bulb, which can get pretty toasty with...
by Scarodactyl
Tue Sep 15, 2020 1:49 am
Forum: Illumination Techniques
Topic: Epi DIC woes
Replies: 59
Views: 6850

Re: Epi DIC woes

Ah, ok I'll have another look at that tomorrow. I did have a look at the field stop and it didn't seem to show doubling but it's hard to tell. Plus sdie, even with some doubling there are subjects it is good for: https://i.imgur.com/faGaMjf.jpg Doubling is still there but doesn't matter as much for ...
by Scarodactyl
Tue Sep 15, 2020 1:46 am
Forum: Microscopy accessories
Topic: 23mm diameter 10x/22 eyepieces (!)
Replies: 19
Views: 1138

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

I'm glad you like them Apo! I know you've looked through many more types of microscope eyepieces than most anyone--makes me glad I bought a few extra pairs for myself as well!
by Scarodactyl
Tue Sep 15, 2020 12:49 am
Forum: Illumination Techniques
Topic: Epi DIC woes
Replies: 59
Views: 6850

Re: Epi DIC woes

That's interesting! I did go through the process of centering the bulb as the manual laid out and it didn't seem to change anything but I'll have to give it another shot.
by Scarodactyl
Tue Sep 15, 2020 12:47 am
Forum: Microscopy accessories
Topic: Add a ring light?
Replies: 10
Views: 246

Re: Add a ring light?

They're a good basic general-purpose illumination and show off gems' sparkle nicely. Not as useful for examining inclusions, you'd really want a dual halogen gooseneck light source for best results. More posts over at GO would definitely be welcome and there's a healthy backlog of info there as well...
by Scarodactyl
Sun Sep 13, 2020 2:07 am
Forum: Illumination Techniques
Topic: Stereo Microscope : Fluorescence Adapter
Replies: 51
Views: 11547

Re: Stereo Microscope : Fluorescence Adapter

Would there be any particular problem with just putting a barrier filter in the light path inside the microscope? I assume it would assure safety if it were a good quality one, though maybe the visual impact would be severe.
by Scarodactyl
Sun Sep 13, 2020 12:39 am
Forum: Microscopes and optics
Topic: Can anyone help with identification?
Replies: 13
Views: 315

Re: Can anyone help with identification?

did the dynazoom have a magnification changer to get a quick close up to decide whether a subject was worth switching over to higher objective? Did they come with trinocular option? Zooming is nice in general. Good for composing photos too. Yes, there is a trinocular option too, easily spottable be...
by Scarodactyl
Sat Sep 12, 2020 8:49 pm
Forum: Microscopes and optics
Topic: Can anyone help with identification?
Replies: 13
Views: 315

Re: Can anyone help with identification?

A trinocular dynazoom can be had for about 100 bucks on eBay (though nkt necessarily such a fine example). Don't sweat the value too much, this would be a great scope to learn on if they end up being interested (though they're quite heavy and could possibly break a foot if dropped on one).
by Scarodactyl
Sat Sep 12, 2020 7:29 pm
Forum: Microscopes and optics
Topic: Can anyone help with identification?
Replies: 13
Views: 315

Re: Can anyone help with identification?

Yup. That's a bausch and lomb dynazoom. The knob on top provides the zoom from 1x-2x.
by Scarodactyl
Fri Sep 11, 2020 12:35 am
Forum: Microscopy accessories
Topic: Adapter to mount B&L StereoZoom Pod to AO StereroStar stand?
Replies: 5
Views: 556

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

You can remove the whole focusing arm from a Gemolite and make an adapter to mount a new one on of any brand. It may even fit either brand natively, not sure. It is just held on with four bolts. That said I saw an AO stand someone had put a bausch and lomb e arm onto. I will see if I can refind that...
by Scarodactyl
Tue Sep 08, 2020 8:52 pm
Forum: Microscopes and optics
Topic: Bausch & Lomb SZ7 Coaxial Illuminator design defect
Replies: 2
Views: 360

Re: Bausch & Lomb SZ7 Coaxial Illuminator design defect

I have also not ever seen one that wasn't extensivelt delaminated. These scopes always seem to have other issues too--these were industrial scopes so probably tend to have a harder life.
by Scarodactyl
Tue Sep 08, 2020 3:37 pm
Forum: Microscopes and optics
Topic: Delaminated objective - how NOT to repair it!
Replies: 15
Views: 1407

Re: Delaminated objective - how NOT to repair it!

Yeah, that would be calcite. Fluorite is isometric so it doesn't have an optic axis.
by Scarodactyl
Tue Sep 08, 2020 12:19 am
Forum: Microscopy accessories
Topic: New infinity corrected water immersion 100X objectives soon.
Replies: 18
Views: 1002

Re: New infinity corrected water immersion 100X objectives soon.

Most of the time you won't want to go straight to a 100x immersion objective anyway. You probably need to be able to examine your sample with your other objectives too and they're probably corrected for a .16 cover slip as well.
by Scarodactyl
Mon Sep 07, 2020 4:27 pm
Forum: For forum members who want to buy and sell equipment
Topic: 0.4mm coverslips - dumping
Replies: 4
Views: 790

Re: 0.4mm coverslips - dumping

I don't think there's any rule against linking to convenient resources.
This might be handy for me but I'm in the US so I'd better not take you up on your offer.
by Scarodactyl
Sun Sep 06, 2020 4:05 pm
Forum: For forum members who want to buy and sell equipment
Topic: Considering upgrade of stereozoom 'scope
Replies: 28
Views: 1134

Re: Considering upgrade of stereozoom 'scope

Yeah, this is one of those procedures which is not obvious and not always communicated to microscope owners which makes a big difference.
by Scarodactyl
Sun Sep 06, 2020 12:54 am
Forum: Microscopes and optics
Topic: Metallurgy objectives
Replies: 9
Views: 419

Re: Metallurgy objectives

Everyone should own at least one stereo, preferably a half dozen.
What brand are you using? Just to think if I've seen any good deals on compatible or close-enough epi objectives.