Search found 1063 matches

by PeteM
Fri Jul 10, 2020 4:31 pm
Forum: Microscopes and optics
Topic: Comparison of AmScope's Plan & Non-Plan Objectives
Replies: 11
Views: 98

Re: Comparison of AmScope's Plan & Non-Plan Objectives

The field of view really is important. Hoping you can double check? An achro should look the same for, say, about 15mm of the field as a Plan Achro. It would be out at 20mm (or up for better objectives) that we'd expect the Plan objective to keep more in focus. Using wide field eyepieces (maybe 10x/...
by PeteM
Fri Jul 10, 2020 4:11 pm
Forum: Illumination Techniques
Topic: Polarizing filters
Replies: 7
Views: 104

Re: Polarizing filters

Thanks. I'll lok for sheets. Those filters are expensive and too big. The camera filters come in a myriad of sizes - I've bought them as small as 14mm for phones and in dozens of sizes to fit microscope heads and field (illumination) lenses. Prices are typically under $10 for the imports. They can ...
by PeteM
Thu Jul 09, 2020 12:15 am
Forum: Microscopes and optics
Topic: Leitz Dialux questions: Mixing 160/170 objectives and best objectives for water organisms
Replies: 11
Views: 139

Re: Leitz Dialux questions: Mixing 160/170 objectives and best objectives for water organisms

Darkfield (DF) would be best with a regular brightfield objective, not phase. As you know, there will likely be a DF stop in your phase condenser. It should probably work pretty well at 10x and 20x. You might get satisfactory results at 40 or by offsetting the stop or a phase ring. If you have a rea...
by PeteM
Wed Jul 08, 2020 5:18 am
Forum: Microscopes and optics
Topic: Some problems with my microscope
Replies: 11
Views: 184

Re: Some problems with my microscope

As suggested earlier, just a complete 1.25 na Olympus condenser that fits your scope would work well. Olympus also made a better color corrected 1.4na condenser, but the extra $100 it might cost won't be all that obvious until you, say, start taking photos with a 100x oil immersion lens, with the co...
by PeteM
Wed Jul 08, 2020 2:49 am
Forum: Microscopes and optics
Topic: Some problems with my microscope
Replies: 11
Views: 184

Re: Some problems with my microscope

A few thoughts, M-UTRG, First, it looks to me like your condenser is missing its top lens. Just getting one that's complete would be a big step up. Right now it's only good for maybe the 10x. The CH-2 is a decent scope and I think you'll be happy with it. If you already have a 40x DPlan objective, I...
by PeteM
Wed Jul 08, 2020 1:15 am
Forum: Microscopes and optics
Topic: Leitz Dialux questions: Mixing 160/170 objectives and best objectives for water organisms
Replies: 11
Views: 139

Re: Leitz Dialux questions: Mixing 160/170 objectives and best objectives for water organisms

There were also short barrel Leitz objectives. These require a "Plezy" adapter to be parfocal with the 45mm parfocal ones.

You might consider phase contrast objectives and a phase condenser for pond critters.
by PeteM
Sun Jul 05, 2020 4:29 pm
Forum: Beginner's corner
Topic: Questions and Parent’s guide to used microscopes?
Replies: 3
Views: 79

Re: Questions and Parent’s guide to used microscopes?

If you'll message me when you have enough posts, I can send you the guide to microscope models and brands. Where are you located - that affects availability. $100 is on the low side to get a good new microscope - for starters I'd look for something that's complete and in good condition locally and u...
by PeteM
Sat Jul 04, 2020 10:11 pm
Forum: Microscopes and optics
Topic: Best DIC options?
Replies: 57
Views: 1397

Re: Best DIC options?

I've updated the earlier chart in light of comments. Thanks all. Two additional questions. First, are the upper DIC sliders the same for both the earliest (what we're calling the rarer type 1) and the second systems ; perhaps with still the one marked II for the Universal scopes and the one marked I...
by PeteM
Sat Jul 04, 2020 8:57 pm
Forum: Microscopes and optics
Topic: Olympus objectives
Replies: 3
Views: 110

Re: Olympus objectives

Perhaps the addition of a neutral density filter in the higher priced series?? I vaguely recall the "Plan C" version started out covering a field of 20mm (?) and were meant mainly for entry level and educational use, the next step up a normal plan field of 22mm, and the UPlanFl N and UplanApo N up t...
by PeteM
Sat Jul 04, 2020 3:11 am
Forum: For forum members who want to buy and sell equipment
Topic: A.O. bits wanted
Replies: 15
Views: 204

Re: A.O. bits wanted

As Zuul says, it should be possible to adapt it. I had one in a similar case and it went back a while. You'd end up with two condenser centering mechanisms - the one on your condenser holder and the one incorporated in the condenser itself. And instead of using the objective inserts to reduce numeri...
by PeteM
Fri Jul 03, 2020 9:10 pm
Forum: Microscopes and optics
Topic: Nikon Fluor Objective Full of Oil!
Replies: 15
Views: 579

Re: Nikon Fluor Objective Full of Oil!

Clever fixture - thanks for posting.

Curious about your screen name. Barry M.?? or ???
by PeteM
Fri Jul 03, 2020 6:17 pm
Forum: Pictures and Videos
Topic: Ascorbic Acid crystals
Replies: 2
Views: 365

Re: Ascorbic Acid crystals

Great images. Thanks for the details of preparation.
by PeteM
Fri Jul 03, 2020 6:15 pm
Forum: Introduce yourself
Topic: Introduction
Replies: 6
Views: 472

Re: Introduction

Welcome. Those Reichert Microstar IV's (410) are good scopes. There are differences in corrections between the heads of these scopes. Series 150 has the same corrections as Series 10; but the head won't interchange. Series 10 are a bit off from Series 410/420. You may find them close enough for phot...
by PeteM
Fri Jul 03, 2020 2:19 am
Forum: Introduce yourself
Topic: Microphotography newbie
Replies: 24
Views: 768

Re: Microphotography newbie

. . . By the way, what is a "shill" (from your last message to me)? Paleome Hi Debra, A "shill" is an accomplice of swindler -- now brought into the Internet age. Several sellers, often those selling goods from China, hire people to post favorable four and five star reviews of their products. I've ...
by PeteM
Thu Jul 02, 2020 11:31 pm
Forum: Introduce yourself
Topic: Microphotography newbie
Replies: 24
Views: 768

Re: Microphotography newbie

I'd suggest starting with a cheap USB eyepiece camera. Normally, I'd recommend USB 3.0 or HDMI because it updates faster and is better to taking moving pictures. But your fossils should be plenty happy with stills :-) and USB 2.0 if you want to save a bit. It will be a little bit slower to get focus...
by PeteM
Thu Jul 02, 2020 5:49 pm
Forum: For forum members who want to buy and sell equipment
Topic: Need advice on selling two BX60's
Replies: 2
Views: 300

Re: Need advice on selling two BX60's

I believe it would be OK to put them up on the equipment exchange part of this forum, with pictures and prices. They sound like reflected scopes; so may be of limited interest to those doing biological specimens. No harm trying to sell on Craigslist. Around here (Bay Area) sellers either lack descri...
by PeteM
Thu Jul 02, 2020 7:28 am
Forum: Microscopes and optics
Topic: Dovetail on the bottom of a BH2 1.25 condenser. 
Replies: 2
Views: 251

Re: Dovetail on the bottom of a BH2 1.25 condenser. 

John, I have them just under 47mm (46.97mm on two examples) at the widest point, with a bit of a cylindrical section at the bottom (to avoid a sharp edge). There's surely some variation out there in various samples. Then a 60 degree angle down that 8mm or so, with a bit of a recess where it means th...
by PeteM
Thu Jul 02, 2020 7:17 am
Forum: Microscopes and optics
Topic: Leica DM
Replies: 14
Views: 555

Re: Leica DM

No problem. Do have a question - though on the head. Are you sure it's a Leica DM IL with the calipers measuring it? See my note above - no idea what size a Leica DM IL is, but could be the one you measured is an older Leitz?
by PeteM
Thu Jul 02, 2020 6:55 am
Forum: Microscopes and optics
Topic: Leica DM
Replies: 14
Views: 555

Re: Leica DM

The wire suggestion should work - anything with the needed diameter to center. If I read this right, Phil, you need to enlarge the dovetail about 2mm all around? If so, could be 12 gauge wire would be about right? 20 amps building wire (Romex as suggested by microb) is typically 12 gauge. But note t...
by PeteM
Thu Jul 02, 2020 3:00 am
Forum: Introduce yourself
Topic: Microphotography newbie
Replies: 24
Views: 768

Re: Microphotography newbie

Some thoughts, Paleome: An eyepiece camera is cheap and good enough for documentation. $100 could get you started. You won't win art photo contests with it - but it should capture your fossils. Your own cell phone can likely take even better pictures; but is a bit cumbersome to attach and remove unl...
by PeteM
Wed Jul 01, 2020 11:56 pm
Forum: Microscopes and optics
Topic: My Olympus BH-2/BHT journey with Thanks! to this forum
Replies: 5
Views: 358

Re: My Olympus BH-2/BHT journey with Thanks! to this forum

. . . I work on telescope eyepieces etc often enough that I decided to try a $20 one off of Ebay. Ive gotten by without one just like you, but would like to have a dedicated tool ... Good decision, IMO. I've often had stuck optics that wouldn't safely remove without just the right spanner -- as wel...
by PeteM
Wed Jul 01, 2020 6:15 am
Forum: Microscopes and optics
Topic: My Olympus BH-2/BHT journey with Thanks! to this forum
Replies: 5
Views: 358

Re: My Olympus BH-2/BHT journey with Thanks! to this forum

Bravo. Excellent scope - now ready to put to work.
by PeteM
Wed Jul 01, 2020 6:12 am
Forum: Introduce yourself
Topic: Microphotography newbie
Replies: 24
Views: 768

Re: Microphotography newbie

Looks like three of us in the Bay Area. Paleome - what camera equipment do you have to begin? Some of the newer cell phones have an excellent camera for micro work and an adapter to hold it in place is one option. Floating or attaching a DSLR to an eyepiece is another options. For quick documentatio...
by PeteM
Tue Jun 30, 2020 6:17 am
Forum: For forum members who want to buy and sell equipment
Topic: Nikon Microphot DIC components
Replies: 6
Views: 237

Re: Nikon Microphot DIC components

John, I've been thinking you're the center of the Nikon universe ever since you helped me sort some things out a year or two ago (much appreciated). Pretty sure this confirms it -- and the new poster should remove it if you wish. Any idea if it fits the Microphot SA?? Pretty sure not something like ...
by PeteM
Mon Jun 29, 2020 11:49 pm
Forum: For forum members who want to buy and sell equipment
Topic: Nikon Microphot DIC components
Replies: 6
Views: 237

Re: Nikon Microphot DIC components

Parafly, what you've shown is, I believe, the DIC setup for the Optiphot 2. It uses a round dovetail attachment to the stand and has the top prism slider come in at an angle. I don't know if the Microphot SA version used the same components and same (at an angle) top sliding prism orientation. Could...
by PeteM
Mon Jun 29, 2020 12:11 am
Forum: Beginner's corner
Topic: Help needed in deciding on first time microscope
Replies: 13
Views: 427

Re: Help needed in deciding on first time microscope

Welcome "Hawk." Given a budget of $200 that's probably an OK place to start. The scope has limitations for an advanced hobbyist; but sort of like having a $25 bicycle and wanting a $4000 one -- anything that works reasonably well beats not having one at all. Might help if you can give an idea of wha...
by PeteM
Sun Jun 28, 2020 11:47 pm
Forum: For forum members who want to buy and sell equipment
Topic: Nikon Microphot DIC components
Replies: 6
Views: 237

Re: Nikon Microphot DIC components

Can you provide photos of what you're looking for - might help you find a match?
by PeteM
Sun Jun 28, 2020 10:39 pm
Forum: Microscopes and optics
Topic: Best DIC options?
Replies: 57
Views: 1397

Re: Best DIC options?

Thanks for the info Charles and that chart, Jochen. Should be of great help to anyone trying to put a Zeiss DIC system together or add to what they have. Does anyone know about what plan field sizes Zeiss supported in the various eras? My impression is that they didn't get to 20mm in objectives, pri...
by PeteM
Sun Jun 28, 2020 4:20 pm
Forum: Microscopes and optics
Topic: Best DIC options?
Replies: 57
Views: 1397

Re: Best DIC options?

Text reads as if there were different types of nosepieces, however while some nosepieces come with the slider holders installed from the factory (when a DIC system microscope is purchased new), subsequent upgrades to DIC require the owner/technician to install them. Either way, it is the same nosep...
by PeteM
Sun Jun 28, 2020 6:08 am
Forum: Microscopes and optics
Topic: Best DIC options?
Replies: 57
Views: 1397

Re: Best DIC options?

One somewhat confusing - and poorly documented - aspect of the Nikon DIC system is that only some versions of the Optiphot stand can accommodate the DIC intermediate tube. The stand needs to have a rectangular cutout immediately behind the nosepiece. I may be wrong, Viktor, but I believe the Optiph...