Search found 1163 matches

by Scarodactyl
Fri Jan 22, 2021 2:43 am
Forum: Microscopes and optics
Topic: Epi DIC on the Balplan!
Replies: 3
Views: 48

Re: Epi DIC on the Balplan!

I should have mentioned that's how I knew what it looked like. It's cool that it works on the olympus, though with apparently less potency. I wonder what else it might work on?
by Scarodactyl
Thu Jan 21, 2021 10:39 pm
Forum: Microscopes and optics
Topic: Epi DIC on the Balplan!
Replies: 3
Views: 48

Epi DIC on the Balplan!

A while back I spotted an eBay listing for a balplan with a DIC slider, and after some consideration I finally put in an offer which was accepted. It sat for a little while because it was missing both the lamphouse and any objectives (well, it had objectives but they were a Nikon 20x and a Leitz 10x...
by Scarodactyl
Thu Jan 21, 2021 2:41 am
Forum: Camera systems and imaging
Topic: Motic SMZ143 with Motic 2x SLR Projection Lens
Replies: 42
Views: 4515

Re: Motic SMZ143 with Motic 2x SLR Projection Lens

You'd get better afocal results with a wider field noncompensating eyepiece. A pancake lens is usually recommended on the camera end, 40mm for an 18mm field number eyepiece on aps-c, shorter focal length for a wider fn eyepiece. There is a good Chinese 10x/22mm eyepiece that will fit the same 23mm s...
by Scarodactyl
Thu Jan 21, 2021 1:07 am
Forum: Microscopes and optics
Topic: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long
Replies: 9
Views: 146

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

Thanks Apo, I appreciate your insight on that. You're probably the only one here who's gottena closer look behind the curtain so to speak. It is marked with a capital W right after the 1.0 as you say. I'll need to get some adapters together and see if I can get a sense of the image it produces. I do...
by Scarodactyl
Wed Jan 20, 2021 7:55 pm
Forum: Microscopes and optics
Topic: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long
Replies: 9
Views: 146

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
Wed Jan 20, 2021 5:28 pm
Forum: Microscopes and optics
Topic: DIC Microscope
Replies: 8
Views: 165

Re: DIC Microscope

That listing looks wack to me.
You need transmitted dic, not epi. Epi is for looking at reflective surfaces.
by Scarodactyl
Tue Jan 19, 2021 6:38 pm
Forum: Camera systems and imaging
Topic: Stereo vs Microscope for photographing Conodonts, Foraminifera
Replies: 7
Views: 98

Re: Stereo vs Microscope for photographing Conodonts, Foraminifera

For 2000 dollars you can do way better than an amscope stereo for photography. The sort of 'ultimate' solution for this is a high quality metallurgical microscope with long working distance objectives and a dslr or mirrorless camera, but you can get a good in-between solution with a photo macroscope...
by Scarodactyl
Mon Jan 18, 2021 11:53 pm
Forum: Beginner's corner
Topic: Is Walter Products / Parco an ok brand?
Replies: 1
Views: 47

Re: Is Walter Products / Parco an ok brand?

Parco has a reputation as a low budget supplier, but they have sold some more expensive scopes too (they sold rebadged Motic m series as well as mitutoyo-lookalike m plan apo objectives for a bit). I would not necessarily trust them to source the best options from China. If you're in Canada you do h...
by Scarodactyl
Mon Jan 18, 2021 1:38 am
Forum: Microscopes and optics
Topic: Finishing Optiphot - BD vs ED, condensers?
Replies: 2
Views: 61

Re: Finishing Optiphot - BD vs ED, condensers?

I had trouble finding a deal on a DIC 5x BD so I just got a normal BD 5x and it worked just fine for DIC, easily as good as the DIC 10x, 20x and 40x I had on there. I suspect you'd need an anomalously bad copy strain-wise for it to be a significant issue but I haven't exactly sampled a lot of them e...
by Scarodactyl
Sun Jan 17, 2021 8:46 pm
Forum: Home-made microscope adaptations
Topic: Acheiving parfocal direct projection (APS-C) on the Wild M420
Replies: 5
Views: 5241

Re: Acheiving parfocal direct projection (APS-C) on the Wild M420

The mirrorless revolution will soon make this topic obsolete, as the original photo tube works fine in that context. I, for one, welcome our mirrorless overlords and love the idea of being able to hook up a camera to one of these without anything hacky. As a side note I recently tried 3d printing to...
by Scarodactyl
Sun Jan 17, 2021 1:36 pm
Forum: Microscopes and optics
Topic: Zeiss Citoval 2
Replies: 31
Views: 937

Re: Zeiss Citoval 2

It looks like a VMF. The VM series are not bad but this one does not change magnification except by adding an aux objective. I wouldn't jump on this one.
by Scarodactyl
Sat Jan 16, 2021 10:49 pm
Forum: Microscopes and optics
Topic: Silicone immersion objectives - any experience?
Replies: 29
Views: 465

Re: Silicone immersion objectives - any experience?

If nobody minds something of a diversion, I recently came across a weird silicone immersion objective:
https://www.ebay.com/itm/161285473379
Image
Feast your eyes on those specs! Those bizarre, baffling specs!
by Scarodactyl
Sat Jan 16, 2021 5:39 pm
Forum: Beginner's corner
Topic: RMS Lens Adapter
Replies: 1
Views: 63

Re: RMS Lens Adapter

It's always funny to me how they picture them flat against the front of the camera as if that would work. But with the appropriate objective and appropriate extension you can get some good results.
by Scarodactyl
Thu Jan 14, 2021 10:08 pm
Forum: My microscope
Topic: I did not expect to get this
Replies: 3
Views: 235

Re: I did not expect to get this

Great catch! I think you'll have a lot of fun with this one.
by Scarodactyl
Thu Jan 14, 2021 4:39 pm
Forum: Beginner's corner
Topic: Oculars or auxiliary lens
Replies: 7
Views: 199

Re: Oculars or auxiliary lens

An NA of 0.2 with a 2x objective isn't too out of reach (the sz7 reaches that in the center of view). I don't think anyone has made a full stereo with a resolution up to 0.6--the current top end offerings all cap off around 1000 lp/mm plus or minus, so around 0.33.
by Scarodactyl
Thu Jan 14, 2021 3:43 am
Forum: Beginner's corner
Topic: What is face contrast?
Replies: 7
Views: 136

Re: What is face contrast?

There's definitely some sort of face contrast involved
Image
by Scarodactyl
Wed Jan 13, 2021 11:04 pm
Forum: Microscopes and optics
Topic: Nikon gene sequencer objectives
Replies: 47
Views: 1701

Re: Nikon gene sequencer objectives

Yes but Nikon says they are CFI., just like the rest of their scopes. Are they or are they not? What then about the Eclipse 200 or 400. Are they more chroma free than chroma free? I'm not drinking the kool aid. Ooooooook then. I thought we were discussing the corrective/noncorrective nature of niko...
by Scarodactyl
Wed Jan 13, 2021 7:50 pm
Forum: Microscopes and optics
Topic: Nikon gene sequencer objectives
Replies: 47
Views: 1701

Re: Nikon gene sequencer objectives

Sure, the eclipse 100 is made in China and uses a simplified tube lens as well as lower FoV eyepieces, and it's also equipped with lower end objectives with smaller image circles. It has lower end optics made to lower overall standards, which is kind of the point. I'm not sure what relevance that ha...
by Scarodactyl
Wed Jan 13, 2021 7:41 pm
Forum: Beginner's corner
Topic: Oculars or auxiliary lens
Replies: 7
Views: 199

Re: Oculars or auxiliary lens

Just to add to what Apo has already said. Stereos don't have a fixed NA--the bottom objective has a maximum NA which is available at maximum magnification, and as you zoom out the zoom system stops it down like an iris in a camera lens to a lower numerical aperture. This has two main adantages: firs...
by Scarodactyl
Wed Jan 13, 2021 6:42 pm
Forum: Microscopes and optics
Topic: Nikon gene sequencer objectives
Replies: 47
Views: 1701

Re: Nikon gene sequencer objectives

If the Nikon objectives do provide ca free performance or in the case of the achromats...almost : how does the system compensate for the ca created in the tube lens? Presumably, that is the job of the eyepieces? In the higher end Nikon heads the tube lens is not really a single lens. It's hard to g...
by Scarodactyl
Tue Jan 12, 2021 11:18 pm
Forum: Microscopes and optics
Topic: Nikon gene sequencer objectives
Replies: 47
Views: 1701

Re: Nikon gene sequencer objectives

The earliest Nikon tube lens I know of (in the head of an infinity Optiphot) can easily cover ultra widefield eyepieces or aps-c given the right objective. Nikon's ITL200 also covers full frame with a Mitutoyo m plan apo fairly well. I don't think the tube lens is a limiting factor. Some modern Niko...
by Scarodactyl
Tue Jan 12, 2021 7:01 pm
Forum: Beginner's corner
Topic: sanity check on new (to me) scope
Replies: 10
Views: 523

Re: sanity check on new (to me) scope

The coaxial illuminator on an smz-10 is meant for flat, reflective subjects like wafers or metallurgical subjects. I'm curious what stand you have on the smz. If you want turbo brightness (and who doesn't?) there were some amazing stands made by Diagnostic Instruments that are sometimes (not often b...
by Scarodactyl
Mon Jan 11, 2021 9:42 pm
Forum: Microscopes and optics
Topic: Olympus BH2 BHM?
Replies: 7
Views: 451

Re: Olympus BH2 BHM?

Do you think if I change the nosepiece the RMS 160 mm objectives will work. Its 180 mm optics, I guess the trinocular head is also different, It's a bit confusing because this is part a finite and part an infinity scope. The 180mm is the focal length of the tube lens, not the physical distance. The...
by Scarodactyl
Mon Jan 11, 2021 9:36 pm
Forum: Beginner's corner
Topic: Selecting BH2 adapter for photo AND video
Replies: 2
Views: 336

Re: Selecting BH2 adapter for photo AND video

When the mtv-3 is recommended for 'video' it means small film/small sensor video cameras. You only need one adapter for your camera, the nfk + photomicro L or equivalent.
by Scarodactyl
Mon Jan 11, 2021 9:30 pm
Forum: Beginner's corner
Topic: Canon EOS DSLR to 23.2mm adapter
Replies: 5
Views: 440

Re: Canon EOS DSLR to 23.2mm adapter

Results will depend on what microscope you're using but tjey probably won't be great. It definitely won't be parfocal if it's a typical photo eyepiece port since the image will be down inside the tube, a long ways down from where your sensor can sit, and refocusing your optics will push them out of ...
by Scarodactyl
Mon Jan 11, 2021 6:37 pm
Forum: Microscopes and optics
Topic: Olympus BH2 BHM?
Replies: 7
Views: 451

Re: Olympus BH2 BHM?

This looks like maybe a BHS that was once configured for metallurgical use but the BH2-UMA illuminator was removed, or a bhs with the wrong nosepiece put on? The BHM stand doesn't have transillumination as far as I know (at least usually but I think always?) Good news: The nosepiece is easy to inter...
by Scarodactyl
Mon Jan 11, 2021 5:26 pm
Forum: Beginner's corner
Topic: Objective with lower magnification than it should
Replies: 10
Views: 543

Re: Objective with lower magnification than it should

In the Axioplan it can’t be penetrating, so the offset might explain the magnifixation lowering. One of the nice things about infinity microscopes is that the length of this gap does not matter*. *for magnification and focus, but longer distances can decrease the size of your image circle and it ca...
by Scarodactyl
Mon Jan 11, 2021 4:02 am
Forum: Beginner's corner
Topic: Objective with lower magnification than it should
Replies: 10
Views: 543

Re: Objective with lower magnification than it should

Typically this would mean that your microscope's head has a tube lens of shorter focal length than the objective is specced for. Later Zeiss infinity stands do have an unusually short focal length (165mm) but I don't know if the axiomat would have used a longer focal length.
by Scarodactyl
Mon Jan 11, 2021 1:27 am
Forum: Camera systems and imaging
Topic: Are photo eyepieces needed?
Replies: 10
Views: 670

Re: Are photo eyepieces needed?

Newhoper has good mechanical quality in the parts he sells but I think he takes a bit of a one-size-fits-all approach optically. You can certainly get an image even without all the corrections or with wrong corrections and for some applications that might be plenty good enough. Usually hobbyists are...
by Scarodactyl
Sun Jan 10, 2021 5:27 pm
Forum: Beginner's corner
Topic: Objective M27 thread extension
Replies: 3
Views: 305

Re: Objective M27 thread extension

That's not a very popular thread--all I can think of are Nikon CF infinity bd objectives. You might need to have this custom made.