MicrobeHunter.com Microscopy Forum

Is there a significant difference between the 1096 and the 1096b? This listing says it is a 1096b: https://www.ebay.com/c/9003206223

Great images! I really appreciate that you add the technique and objective info.

I have quite a few catalogues but not the capacity to scan them currently. That should change by fall. Adobe has a shockingly good smartphone app that “scans” using the camera. It is cleverly named Adobe Scan. It allows you to crop and correct keystone distortion and even converts to text (OCR) whe...

Fascinating process. Big thanks for sharing with us! I think you have demonstrated that this is not an aspect of the hobby I should pursue. I’m far, far too impatient. But, if you have any slides in your “junk” pile that aren’t up to snuff, let me know. I’m sure that even slides you are unhappy with...

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Welcome! I live in the Bay Area, too. (South Bay) You will find some of the members are practically encyclopedias of knowledge and very happy to help.

Timemaster1212 wrote: ↑

Thu Jun 25, 2020 6:05 pm

Is it common for a filter to increase image exposure time dramatically?

An 80A photo filter reduces light by about 2 and 2/3 stop. That is the blue filter you would use to correct tungsten to daylight balance, so should be similar to what is in your scope.

I am happy to be wrong [by consensus] but I always thought that the acceptable limits for dioptre adjustments would be what the manufacturer provides. ... and I don’t think I have ever seen an eyepiece with +/- 7 range. MichaelG. Do you have a 7 diopter difference between your right and left eye? T...

i recall seeing a video where for starting out oil immersion techniques were advanced and not for newbies like me. It’s not that oil immersion is advanced in the sense that it is hard. It’s just extra steps to clean up, and many (particularly newbies) would rather not have that extra task. I just g...

No i do not at all. This too looks better than the original, however it is still lacking crispness. Maybe at this point the objectives do matter? That image was shot at 43x, so resolution should already be low correct? If so would, for example, an APO objective perform remarkably better? “Remarkabl...

The opposite. The Neoplan objectives were a more budget friendly 45mm adaption of some of the 34mm designs. They were pitched at institutional use; schools etc. They are not quite plan at 20mm, somewhere between semi-plan and plan. Wouldn't a simple "achromat" imply the objective is not particularl...

With achromats I'm sure some CA is expected True, but the Neoplans should be better in this regard. I’m following with great interest having recently received a Microstar IV of my own. Unfortunately, my plans have been slowed by a cracked lamp socket. It was working when I received the scope, but d...

I don’t pretend to have any idea why it was made that way, but I can’t imagine that is was accidental. The taper is too pronounced to be overlooked.

If I understand your description, there is a point in the travel of the mechanical stage where the focus abruptly shifts. Does it happen at exactly the same place every time you move the mechanical stage? If you lightly rest a finger on the stage and move it past that point, can you feel a bump or o...

.926 is 85% of 1.080. For 5% tolerance resisters, that is well out of spec. Maybe I’m too picky, but that level of error indicates a faulty meter in my mind.

Hobbyst46 wrote: ↑

Sat Jun 20, 2020 2:32 pm

since animal eyelashes or hairs and pulled glass needles are inaccessible to me

You don’t have eyelashes? (Sincere apologies if you suffer alopecia.)

4 x 270 Ohm resisters in series should read over 1k Ohm. Your meter is not working. You should be able to read any one of the resisters within a couple percent of the nominal resistance, so quite easy to test.

There is almost zero risk in experimenting with whatever pot you have handy. All (normal?) pots go to zero Ohms, so you can’t overdrive the circuit beyond it’s designed voltage/current. Worst case scenario if you have one rated too high is the adjustment will be extremely sensitive (and most of the ...

I thought I had ordered 4000K LED's but you're absolutely right, these are way off from where I expected these to be and just seemed to not notice. It's for the time being still pretty nice but I would like to get my light a bit more accurate if I did go for a higher power LED In my experience, 5mm...

The LED I'm using is quite white(neutral white), far better than the very warm white from the original bulb, I'm not sure why it looks so blue in the picture but there are quite a few different color temperatures available for LEDs I have a standard 5mm LED rated at 15,000 mcd, I'm not sure how tha...

15k Ohm is a decent guess based on your partial measurements.

Can you measure with one probe on the right-most contact and the other probe on the left-most contact? That is the value you are after. X to X in your diagram.

Can you get a measurement across the outer 2 contacts? That will tell you the value of the pot. Pot.jpg The dark grey area in the outer ring is the resistor material. When the wiper bridges from the middle ring to the outer near a contact, it doesn't travel through the resister at all. Bridging from...

If it is truly dead, and you don’t mind a “no return” option, you could open it up and meter the contact disk directly. The fact that cleaning helps, even briefly, says to me that the wipers are the problem. If that’s true, getting an accurate measurement should even possible. The resistance from on...

Choanoflagellate Colony? Dead or nearly so.

The links are not working. Maybe best to just post the model number.

While I find these really cool from an aesthetic perspective, I’m struggling a bit to see the practical application of this technique. What would this method reveal that others do not?

I couldn’t find any information on the lighting set up of that scope, and I don’t have first hand experience with anything similar, so it’s hard to give good advice. Some scopes use carefully engineered optics to focus directly on the bulb’s filament. Putting any old LED replacement bulb in those wi...

LED retrofits are popular, but need to be done properly to maintain optical performance. What kind of scope is it? That will help folks point you in the right direction.

Heh, maybe these days, but I have bought a bucket of surplus filters a few decades old for a pittance and they are all linear. Could be an age thing. I don't remember the exact reason, but I thought "pure" polarized light messed with phase detect focus or something like that. That means circular wo...