Search found 536 matches

by Scarodactyl
Fri Jan 22, 2021 6:39 pm
Forum: Equipment Discussions
Topic: What the @&$% objective get
Replies: 5
Views: 71

Re: What the @&$% objective get

Maybe not as lucky as me, given the lack of provenance on mine. It was packed OK but not amazing too. I was definitely worried it might be bad but so far it seems really nice. That said I haven't actually looked at my quick test photos yet beyond zooming in on the corners on my camera screen, and I ...
by Scarodactyl
Fri Jan 22, 2021 2:06 pm
Forum: Equipment Discussions
Topic: What the @&$% objective get
Replies: 5
Views: 71

What the @&$% objective get

Last week I spotted a mitutoyo 20x objective for sale at a reasonable price. The glass looked clean but the styling was strange, with a sharp knurl on the outside rather than fluting and a slightly odd label I'd never seen before. So, maybe one from the very beginning of the line in the 80s when sty...
by Scarodactyl
Thu Jan 21, 2021 11:52 am
Forum: Equipment Discussions
Topic: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long
Replies: 9
Views: 238

Re: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long

LSM is Laser Scanning Microscope. I am not sure how well these would work for conventional imaging since in one of the catalogues they describe the marking as "exclusively for LSM". I appreciate that MacroCosmos. There are a number of interesting objective assemblies on eBay, though mostly way overp...
by Scarodactyl
Wed Jan 20, 2021 2:48 pm
Forum: Equipment Discussions
Topic: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long
Replies: 9
Views: 238

Re: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long

That might make sense, though the 0.17 coverslip suggests something biological. I will have to wait on getting an adapter to mount my new nosepiece on my microscope so I can properly test this but I am hoping I can take some ultra high resolution images of gem inclusions (provided they are extremely...
by Scarodactyl
Wed Jan 20, 2021 12:56 pm
Forum: Equipment Discussions
Topic: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long
Replies: 9
Views: 238

What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long

So I recently won an eBay auction on this bad boy: https://i.imgur.com/7ekGJow.png https://i.imgur.com/OVIanwi.png https://i.imgur.com/IT9svVY.png https://i.imgur.com/AQdmsVG.png https://i.imgur.com/4Edo415.png It just came in and it's just baffling. As the title of the thread says it's a Plan Apo 4...
by Scarodactyl
Tue Jan 19, 2021 12:56 pm
Forum: Equipment Discussions
Topic: 50X objective recommendation
Replies: 31
Views: 1116

Re: 50X objective recommendation

I'm glad to hear they sometimes work. On both of mine the fine focus does not work at all, it just spins--on one of them it occasionally grips for part of the turn. So there are at least some QC issuws in addition to the cheap build quality.
by Scarodactyl
Mon Jan 18, 2021 10:32 pm
Forum: Equipment Discussions
Topic: Can someone tell me the difference between these two Nikon apos?
Replies: 11
Views: 285

Re: Can someone tell me the difference between these two Nikon apos?

Higher end nikon objectives from the finite era needed to be able to cover ultra widefield eyepieces with a field number of 26.5mm, so they tend to cover aps-c pretty well. A 2.5x eyepiece by contrast will have a field number around 20mm (someone probably has the right number on hand) and in my own ...
by Scarodactyl
Mon Jan 18, 2021 3:20 pm
Forum: Equipment Discussions
Topic: 50X objective recommendation
Replies: 31
Views: 1116

Re: 50X objective recommendation

I'll shoot you a message when it comes in and I've tested it out.
by Scarodactyl
Mon Jan 18, 2021 12:12 pm
Forum: Equipment Discussions
Topic: Can someone tell me the difference between these two Nikon apos?
Replies: 11
Views: 285

Re: Can someone tell me the difference between these two Nikon apos?

They weren't making superapos (VC) back then as far as I know so apo is as apo as it's going to get. They're cheap for no good reason, they should be excellent. The biggest thing for fiddly image quality is setting your microscope head up for direct projection if you are using a trinocular head. In ...
by Scarodactyl
Mon Jan 18, 2021 11:55 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Advice please: High NA air objective with small WD
Replies: 15
Views: 3788

Re: Advice please: High NA air objective with small WD

The Nikon epi DIC prisms I have tried (from the finite Optiphot series) give good results with mitutoyo objectives, at least when set up on a Nikon microscope. I'll eventually try it with my newer eclipse-era DIC slider but I need to have an adapter made to mount the nosepiece. Subjects don't have t...
by Scarodactyl
Sun Jan 17, 2021 7:01 pm
Forum: Equipment Discussions
Topic: Can someone tell me the difference between these two Nikon apos?
Replies: 11
Views: 285

Re: Can someone tell me the difference between these two Nikon apos?

The Nikon CF series lasted for like 20 years, from the 70s into the 90s. There were a few style refreshes between the biophot and the labophot 2. They probably perform similarly, though a newer one (with the black paint) might be marginally better in some way, but it might also be a little less robu...
by Scarodactyl
Sun Jan 17, 2021 11:22 am
Forum: Equipment Discussions
Topic: BW optics microscopic objectives reviews
Replies: 2
Views: 152

Re: BW optics microscopic objectives reviews

Reviews have not been too kind to these. It can be hard to nail down exactly which mitutoyo knockoff is being discussed since there are a few out there, but I think BW sells the low tier "HL" ones which don't really give apo performance. For mitutoto ripoffs, Motic's M Plan Apo ELWDs (also sold as E...
by Scarodactyl
Sun Jan 17, 2021 11:05 am
Forum: Equipment Discussions
Topic: 50X objective recommendation
Replies: 31
Views: 1116

Re: 50X objective recommendation

Do not buy that focus block. It's trash, I have gotten two of them in hand (one used one new) and neither even works. Really bad build quality. I have a couple of the focusy parts from bhmjs coming in that I got a deal on. If they are good I can pass one on--maybe a swap for the objective if you did...
by Scarodactyl
Sat Jan 16, 2021 3:43 pm
Forum: Equipment Discussions
Topic: BD Objective Survey / Options
Replies: 20
Views: 2919

Re: BD Objective Survey / Options

I think that might defeat the purpose a bit for darkfield imaging, though it's ideal for anything else. Is the tip narrower than the non bd equivalent when the shell is off? I got a halogen ring light that fits over the end of my mitties (but doesn't slide all the way on because of a lip), and they ...
by Scarodactyl
Fri Jan 15, 2021 7:37 pm
Forum: Equipment Discussions
Topic: 50X objective recommendation
Replies: 31
Views: 1116

Re: 50X objective recommendation

I'm using it with a Raynox DCR-150 with roughly 180 mm tube length. Adding another 25 mm extension to bring it closer to 200 mm doesn't change the very tight working distance. Bummer. Is image quality good at least? It looks like they made these mitutoyo/akashi hardness testers for some tiem so the...