I use ND filters with my Wild M20 to attenuate electronic flash when taking photos of protozoa. I couldn't afford a range of glass filters so I bought a half...
... They can, there is a control knob on the top front of the unit for the user to adjust the actual brightness of the light. What they cannot touch is the...
... ? Do both knobs control the lamp intensity? If not, what does the control knob in the base do? ... OK. ... OK. ... OK. So the controller blows to protect...
I use a 0.5X auxiliary lens on my B&L Stereozoom 4 which I use for micro-welding repair of some lab items. The reason I use it is the increased working...
Of course, some applications require an increased field-of-view - and those users simply have to tolerate the increase in working distance, when using a ...
Rich It is all pretty simple and cheap and uses a modified Vivitar 283 as described by Charles Krebs http://www.krebsmicro.com/VIV283/index.html. These are...
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May 27, 2012 10:08 am
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To J_Hudson: Thank you for your excellent post and web-link! The correct link from your post is: http://www.krebsmicro.com/VIV283/index.html [no "period" at...
I am 72 and wear glasses. I have a love of science and growing plants. I belong to a plant tissue/cloning club although I have done little in cloning. I am...
It looks like you need a variable version of the eBay Halogen regulator I suggested. I have never seen one for sale. If you can live with strictly on or off...
Look, this is an integrated commercial unit from a reputable maker. One of these conditions must apply: There is a defective or underrated part in the design. ...
Hello and welcome, John. My opinion is a biological (student level perhaps the industry terminology?)...get a biological phase-contrast microscope with a...
John: Hellow I am 60 so don't feel lonesome, I wear glasses too and I'm not far behind you. :) I suggest getting an old AO from the 10 series.Cheap and built...
Hi, I think you have come to the right place. First, eyeglasses are not a problem, as long as you use the correct eyepieces. If you are interested in looking...
I agree with John but there may be one more possibility to check into. The variable resistor (incorrectly labeled "dimmer switch" in the Swift parts list, I...
IMO, a pot failure is pretty unlikely. Oh, I've been an EE for nearly 50 years, doing circuit work much of the time. I've seen perhaps one or two failures like...
Gentlemen: I have a Meiji RZ low-power stereo zoom, and a Black labolux-D ~1970 Polarizing microscope; which I have used ~only~ for looking at mineral grain...
The commonest cause of tungsten bulb failure, plain or halogen is thermal shock. The initial resistance of a tungsten filament is very low, so peak current...
Blair, I started microscopy as a hobby with a black Leitz Laborlux binocular scope and added a few more vintage Leitz & B&L scopes and a wide variety of ...
I would appreciate any comments regarding an apparent issue I notice with my M3Z: The image quality and brightness are fine at all magnification except when I...
Until recently when it has likely become more economical to use switching power supplies, most six and twelve volt dimming quartz halogen supplies that I have...
... Agreed, up to the last part. Triacs do not release (stop conducting) at zero current, but at some small current greater than zero. The capacitor across the...
OK, I'm gonna take stab at this... It has something to do with the concept that your magnification is too high for your "real, or optically-apparent" numerical...
Hi I do not have experience zoom type stereoscopes. I have wild m5 and it has calilean type mag-changer. With 50x it no so bright as with smaller mag. It is...
Hi, Thanks for the replies thus far. As Pauli indicates, there is a significant downsizing of the diaphragm as one approaches the high magnifications which, as...
Does any member know the history of the Stereo Zoom scope and their numbers, in particular the StereoZoom 3? What I would like to determine is what was the...
Well, I hate to go a bit off-topic on my own thread, but I'm curious about your micro-welding. Do you use a torch? If so, is it a hydrogen/oxygen mix? A...
There used to be a "Water Welder" that dissociated water electrolytically to make H2 and O2 and recombined it at a hypodermic needle tip. As I remember it was...
