MicrobeHunter.com Microscopy Forum

Only downside to larger field of view is brightness. Not as bright, though may not be an issue in most circumstances.
Older fluorescence microscopes using only 50W mercury lamp had small f.o.v eyepiece to get good signal from specimen.

Hi Zero, The 1512 is a great instrument that will stand the length of time, if not having done so already. Leica’s 410 is Kluber Nontrop KR 291. This is used on the knife holder bed, as well as the vertical dovetail type bearing. There are rubber pads used in these bearing surfaces that you have to ...

Typical signs of DMLS that could be an issue:
- binocular head IPD unable to be adjusted/tight due to old lubricant
- focus being seized due to old lubricant

Both hopefully being not the case if being nicely serviced.

I would not suggest to use lubricant from a spray can, the propellant can cause damage to the metal parts. I have only ever used Olympus and Leica original lubricant so am unsure of what else can be used which is readily available, maybe Black molykote? With the gear box in place, and the fine focus...

Not a problem. It’s great that the gear box in intact and teeth have been stripped. I have only one original box left, and have had to machine up the gear that normally strips. It is possible that the nylon gear in the planetary gear box has become defective. Luckily, the newer BX 1&2 series use the...

Forgot to mention, When reinstalling the gearbox, be careful to have the teeth mesh with the rack correctly (not on top of each other). Have the 2.5mm Allen screws slight loose, lift the focus block (or stage) up ever so slightly then tighten the screws. Sometimes the coarse focus can feel lumpy if ...

Sometimes shims have not been applied. Depending on the backlash between gear box and rack which you can now see, some maybe applied to take up the excess slack. There should always be a small amount of play though. The lubricant in the gear box looks like it requires replacing. It should spin quite...

A tight fitting pin punch works well, or a 3mm Allen key. The lubricant would have become dry, gluing the collar in place. There is also a gear box in the back of the stand, behind the panel on rear of stand held on by four small Phillips screws, which will most likely be seized up as well. The gear...

Yes, I totally understand. I myself no longer have access to the original Leitz collimator kit. I am hoping that one day again I will have it in my hands. The target was a laser etched cross hair on a centred circular surface mount mirror. It could be placed in mounts to adapt to areas like the tran...

Hi Guys, It may not be visible to the eye, though the mirror would originally have been aligned in both the horizontal plane and angle in the factory or trained service tech. Having it out of alignment/collimation may not interfere with a obtaining a decent image, though I would prefer my scope to b...

Hello Janvangastel, I do not come on here as often as I’d like, so I apologise if you reply to this and I don’t answer for some time. Internally, your original power supply has a carbon roller that rolls across an open wire wound transformer to adjust its power output. Where the carbon roller rests ...

Is it the Ortholux I series microscope? If so, to remove the binocular head you have to push the silver lever on the right hand side at the top of main microscope limb in, then slide the binocular upwards. It’s on a dove tail.

No tricks. And by condenser clamp, I trust you speak of the little knurled knob on the left.
Does the clamp/knob twist? No = problem, Yes = next
Does the condenser shift forward at all when clamp is released? No = problem with condenser dovetail mount, most likely old lubricant. Yes = No Problemo!!

a) It is a legit Pol rotatable stage. The attachable mechanical stage on top is an accessory mainly used for high magnification adjustments. Placed on the correct microscope, the overhang should not be an issue, in terms of colliding with microscope frame/limb. b) the cut out’s in the inner disk are...

mrsonchus wrote:

PrecisionInstruments wrote:Didn’t come with a HSE Test Slide did it?

No, there was just the reticle......

Bugger!! They’re worth a pretty penny

Didn’t come with a HSE Test Slide did it?

The BH2 (BHT, BHTU, BHS) had either a dedicated Darkfeild condenser, or a dark field ring incorporated in the phase condenser turret. These would fit into the position where your current condenser is. I believe the condensers in the links or above post would not be compatible with your microscope.

Now for the question. I have added a close-up of the front of the machine below. There are two light expansion springs and two pairs of round pins that are not being used for anything. Since one end of each spring is fixed the other ends must go to something that moves. The springs are very light s...

By the looks, you have a RM2045. A semi motorised beautiful specimen. The advance mechanism from these series (2035, 2045, 2055) are still used today on the Leica RM2125RTS. The advance and retraction is purely mechanically driven. The only electronic function in the specimen advance and retract fun...

I’d say the lubricant between both items 10 and 13 is dry and turned to glue. Should not have to remove 18 from 10, otherwise collimation error will be an issue.

Great!! Yes, the lubricant in these barrels turn green after a period of time (good old Leica 410). The two brass lock nuts are to be set to a nice tension where the coarse focus feels a nice drag, but can cause the stage to fall if too loose.

What exactly was disassembled? The focus barrel mechanism or the z-axis linear bearings?
The barrel has no influence on the height stop, though it is crucial for tension.
Which knob is drifting/falling? Coarse or fine knob?

The lubricant has most definitely turned green and dried out, a common occurrence for this particular Leitz/Leica lubricant after a period of time (10+ years). If you would like to clean and replace with original factory lubricant which was called 410, it is actually a Kluber lubricant called NONTRO...

I agree with Apochronaut. If you have removed the possibility of reflection from above, then it may well be a hazed screen on the under side of the field lens presenting an image of the field diaphragm. This optic does get dirty on the underside, though this optic assembly can also eventually show l...

Have you placed a business card directly under the condenser to see if it disappears? It may well be a reflection.