Search found 1688 matches

by PeteM
Fri Jun 11, 2021 4:11 pm
Forum: Microscopes and optics
Topic: Nikon SMZ-U repair info?
Replies: 1
Views: 68

Re: Nikon SMZ-U repair info?

Just to help others - the SMZ-U has rubber focus knob covers. These can be pried off revealing socket head screws attaching the knobs. Once the knobs are off, the four screws at the top and the four at the bottom open up the plastic clam-shell housing. Once inside, the mechanism is very well made an...
by PeteM
Thu Jun 10, 2021 12:01 am
Forum: Microscopes and optics
Topic: Nikon SMZ-U repair info?
Replies: 1
Views: 68

Nikon SMZ-U repair info?

I've acquired most of an SMZ-U in need for what might (hopefully) be minor repair.

Does anyone have a link or a copy of a Nikon SMZ-U repair manual?

On edit - I was able to safely open it up and find the first problem.
by PeteM
Tue Jun 08, 2021 5:37 pm
Forum: Beginner's corner
Topic: Help with buying a microscope for photography
Replies: 21
Views: 584

Re: Help with buying a microscope for photography

To add, if buying from Ebay in the US you might assemble a proper Leitz Laborlux system togther for under $700. A used Olympus BX40, Nikon E400, Motic BA400, AccuScope 3025, or other generic infinity scopes with a decent fine focus, 10x/22 widefield optics, a trinocular head, plan achromat objective...
by PeteM
Tue Jun 08, 2021 5:35 pm
Forum: Beginner's corner
Topic: Help with buying a microscope for photography
Replies: 21
Views: 584

Re: Help with buying a microscope for photography

My take, as suggested earlier, is that Leitz white Laborlux era finite scopes are excellent IF you can find one properly equipped for your somewhat advanced photo needs. If using a full frame camera, you want about a 2.5x equivalent relay lens (which they got with an 8x photo lens and a .32x adapter...
by PeteM
Tue Jun 08, 2021 5:17 pm
Forum: Beginner's corner
Topic: Viewing Bacteria With Bright-field Microscopy
Replies: 18
Views: 334

Re: Viewing Bacteria With Bright-field Microscopy

Bacteria are usually stained to add contrast and help in identification. Most of them tend to be small - with not much more than their shapes visible even at 400-1000x. Given all that, brightfield viewing works fine.
by PeteM
Sun Jun 06, 2021 5:06 pm
Forum: Miscellaneous
Topic: Microscopes on TV
Replies: 8
Views: 236

Re: Microscopes on TV

A local news station did a bit on advanced medical tech a few nights ago. Seems a microscope picture is always needed to make things sciency? In this case, they cut to an image of a cheap recent vintage Chinese scope of the type that retails for around $150. Apparently just the ticket for genetic re...
by PeteM
Sun Jun 06, 2021 3:09 pm
Forum: Beginner's corner
Topic: Help with buying a microscope for photography
Replies: 21
Views: 584

Re: Help with buying a microscope for photography

They're very similar. One option which might have been available for either scope include a 100 watt halogen lamp vs. the 20 watt type that plugs in the from the back. As a photographer you might the brighter light source and the power supply to drive it. There was also a different means of focusing...
by PeteM
Sun Jun 06, 2021 1:04 am
Forum: Beginner's corner
Topic: Help with buying a microscope for photography
Replies: 21
Views: 584

Re: Help with buying a microscope for photography

I'd agree that you probably don't need apo objectives - but plan objectives would likely be a plus.
by PeteM
Sat Jun 05, 2021 11:40 pm
Forum: Microscopes and optics
Topic: I Have A Weight Problem
Replies: 11
Views: 286

Re: I Have A Weight Problem

Jeff - Cheap Chinese scopes tend to be small and light in weight. I recall an Omax trinocular that sold new for under $300 - it seemed to be maybe a third the weight of a DMLS or DMLB. Equipped with plan achromat objectives (a few more $$$), it would be usable for photography. There are also tiny "f...
by PeteM
Sat Jun 05, 2021 11:34 pm
Forum: Microscopes and optics
Topic: Is this a good objective?
Replies: 13
Views: 332

Re: Is this a good objective?

Probably not the best choice unless your "entry level" scope is a Leitz and you have the proper correcting eyepieces to go with it. It also may not be plan. What scope and 40x objective do you have?
by PeteM
Fri Jun 04, 2021 4:27 pm
Forum: Beginner's corner
Topic: Buying Suggestions/Q's: Used Phase Contrast Microscope
Replies: 7
Views: 247

Re: Buying Suggestions/Q's: Used Phase Contrast Microscope

Most phase contrast microscopes with a condenser turret for the phase annuli will run a bit over your budget. The new Motic posted elsewhere is the best deal I've seen on a new scope. The best deals I've seen on a used scope are old American Optical series 50 or 60 around $200 or so. These are simpl...
by PeteM
Thu Jun 03, 2021 1:15 am
Forum: Beginner's corner
Topic: Question about a Particular Phase Contrast Microscope
Replies: 12
Views: 343

Re: Question about a Particular Phase Contrast Microscope

I'd second the idea that a B&L Balplan phase scope would be superior if anywhere near your budget. We've had a couple of those cheap phase sets pass through. While usable, the rotary phase condenser is very cheaply made and the annuli are easily knocked out of alignment. The objectives are of modest...
by PeteM
Wed Jun 02, 2021 4:12 pm
Forum: My microscope
Topic: Cameras in a lab
Replies: 3
Views: 233

Re: Cameras in a lab

"Ajax is stronger than dirt!" Dirtbags? Dirty marketing tricks? Seriously, this sounds like Spam (I'll spare the image of that). There are hundreds of security solutions available - and any supplier attempting to spam this or other sites should surely be avoided. I'd imagine that evaluating the many...
by PeteM
Tue Jun 01, 2021 3:45 pm
Forum: Beginner's corner
Topic: Help with buying a microscope for photography
Replies: 21
Views: 584

Re: Help with buying a microscope for photography

Seems to me the Laborlux S you're looking at doesn't advance you very far towards you goal of having a great scope for taking photos. The stand is mechanically good, but not likely to be any better than the Laborlux 12 you already own. With the possible exception of the 10x none of the objectives yo...
by PeteM
Sun May 30, 2021 1:52 am
Forum: Microscopes and optics
Topic: What are the quality criteria for stereo microscopes?
Replies: 16
Views: 660

Re: What are the quality criteria for stereo microscopes?

To add, the AmScope 1x & 3x (10x and a30x) stereo microscope model you (linuxuser) linked is one we recommend as one of the least expensive usable new microscopes for kids. I don't recommend getting one with the 15x and 20x eyepieces or any model that doesn't go down to at least 10x. In your case, t...
by PeteM
Sun May 30, 2021 1:50 am
Forum: Microscopes and optics
Topic: What are the quality criteria for stereo microscopes?
Replies: 16
Views: 660

Re: What are the quality criteria for stereo microscopes?

Something like a "macroscope" or an inspection microscope -- possibly connected via a camera to a large 4K monitor -- might be more useful for you. With "NLP" in one eye, half the optics in a stereo microscope are lost to you and also just take up a bit more pace on a bench. These might have a simil...
by PeteM
Sat May 29, 2021 7:56 pm
Forum: Microscopes and optics
Topic: What are the quality criteria for stereo microscopes?
Replies: 16
Views: 660

Re: What are the quality criteria for stereo microscopes?

Just to add on the Wild M8, once I added a plan objective my main complaint was that the OEM eyepieces are limited to 21mm. It turns out that 10x/23mm FN Nikon stereo eyepieces work just fine once you machine them to fit about 6mm further into the Wild eyetube. Despite the wider field, I'm not seein...
by PeteM
Sat May 29, 2021 7:37 pm
Forum: Microscopes and optics
Topic: What are the quality criteria for stereo microscopes?
Replies: 16
Views: 660

Re: What are the quality criteria for stereo microscopes?

Today's best and most expensive stereo microscopes are likely to be zooms. It's a bit like manual and automatic transmissions (and now continuously variable transmissions) in the days before we learned how to make really good automatics. It's cheaper and easier to make an entirely satisfactory manua...
by PeteM
Sat May 29, 2021 5:44 pm
Forum: Microscopes and optics
Topic: What are the quality criteria for stereo microscopes?
Replies: 16
Views: 660

Re: What are the quality criteria for stereo microscopes?

Perhaps the best way to look at this is to start with the intended purpose, rather than searching for the best specs attainable at any cost. The best specs for motorized transport might be something like zero to sixty miles per hour under 3 seconds and a payload capacity of many tons – but the first...
by PeteM
Sat May 29, 2021 6:11 am
Forum: Beginner's corner
Topic: Questions about buying my first microscope.
Replies: 4
Views: 513

Re: Questions about buying my first microscope.

To add, you can use phase contrast objectives in brightfield at a slight loss of contrast and resolution. Adding a single good quality brightfield objective, suitable for darkfield observation, to a phase contrast setup might be a good combination for someone who wants to view unstained cells.
by PeteM
Sat May 29, 2021 3:41 am
Forum: Beginner's corner
Topic: Questions about buying my first microscope.
Replies: 4
Views: 513

Re: Questions about buying my first microscope.

Is there a reason to restrict yourself to AmScope & Swift? $400 could buy a significantly more capable used microscope. Stretch a bit to $500+ and there is also an Ebay listing for new Motic phase contrast scopes, built to a bit higher standard and a good choice if you will be using a cell phone & h...
by PeteM
Fri May 28, 2021 6:48 am
Forum: Microscopes and optics
Topic: 100x Concerns
Replies: 29
Views: 1089

Re: 100x Concerns

My reading was that the OP was trying to apply the oil directly to the objective, rather than the slide, and had the objective rotated out of position to make the attempt. Hence the desire for a sticky immersion oil and repeated mentions of applying the oil directly to the objective lens. Either tha...
by PeteM
Thu May 27, 2021 6:39 pm
Forum: Microscopes and optics
Topic: 100x Concerns
Replies: 29
Views: 1089

Re: 100x Concerns

My preferences: 1) Immersion oil with the tube shaped long nose plastic dropper built in. Far easier than a glass rod or conventional dropper to put a drop of oil where you want. 2) If your objectives aren't already parfocal, use parfocal shims to get the 4x through 40x pretty much on focus. It's OK...
by PeteM
Thu May 27, 2021 6:29 pm
Forum: Pictures and Videos
Topic: Predator and Prey Didinium versus Paramecium
Replies: 3
Views: 364

Re: Predator and Prey Didinium versus Paramecium

I was inclined to say that those excellent images speak for themselves.

But then you added that excellent background text and had another Berdan provide a musical score. Turns out there was a lot more to be said and heard.

Bravo, all around.
by PeteM
Thu May 27, 2021 6:22 pm
Forum: Microscopes and optics
Topic: First stereo scope!
Replies: 7
Views: 559

Re: First stereo scope!

Ross - to add to the discussion: The short gray OEM .75x Olympus supplemental objective would be a perfect complement to your stand. It gives a more useful low end of about 5x versus 7x. And as suggested above, 1.5x seems fine and 2x is pushing it. A .5x generic objective is just beyond the limits o...
by PeteM
Wed May 26, 2021 11:51 pm
Forum: Microscopes and optics
Topic: First stereo scope!
Replies: 7
Views: 559

Re: First stereo scope!

That's a fine stereo scope - it will likely give you many years of good service. The cheap supplemental lenses work OK for viewing. Something in the .5x range often comes in handy. The genuine Olympus ones starting with 110AL.. are out there, start as low as .3x, and look to be a bit better made. Wi...
by PeteM
Wed May 26, 2021 3:57 pm
Forum: Microscopes and optics
Topic: Wild Heerbrugg Stereo Zoom Polarizing Microscope POL
Replies: 1
Views: 123

Re: Wild Heerbrugg Stereo Zoom Polarizing Microscope POL

I haven't found affordable replacements either. There are some options. I recently made a few opaque stage plates for a couple Wild bases -- and recall 60mm was a good fit. Mine were made of black plastic with a textured matte finish. Don't recall the depth of the retaining hole, but it's easy enoug...
by PeteM
Sun May 23, 2021 11:33 pm
Forum: Camera systems and imaging
Topic: Camera fov
Replies: 8
Views: 419

Re: Camera fov

Greg, Matching what you see through the eyepieces and what the camera records is going to depend on your setup in front of the camera as much as the sensor size itself. A typical setup for lower cost scopes like AmScope might be a small sensor size USB eyepiece or C-mount camera, sometimes with a .5...
by PeteM
Sat May 22, 2021 12:24 am
Forum: Pictures and Videos
Topic: flickering problems, how do you deal with it?
Replies: 16
Views: 2034

Re: flickering problems, how do you deal with it?

FWIW, it would be rare for the cause of flickering in a tungsten filament or tungsten-halogen bulb to be an AC rather than DC supply. The filament typically doesn't cool down that much as the current passes zero every 1/60th of a second. Rather, the causes Greg and others mentioned are more likely.