Search found 1424 matches

by Charles
Sun Jul 02, 2023 4:35 pm
Forum: Microscopes and optics
Topic: Zeiss Rotating Stage
Replies: 11
Views: 2405

Re: Zeiss Rotating Stage

Yes, that rotating Zeiss stage will fit the screw pattern on a Carl Zeiss Standard.
by Charles
Tue Jun 27, 2023 1:31 pm
Forum: For forum members who want to buy and sell equipment
Topic: WTB: Zeiss Universal, Photomicroscope II or III stand
Replies: 6
Views: 1678

Re: WTB: Zeiss Universal, Photomicroscope II or III stand

It helps to know where you are located for shipping costs. You can just replace the whole focus block.
by Charles
Tue Jun 27, 2023 1:26 pm
Forum: Microscopes and optics
Topic: Want to switch out the field diaphragm on a Zeiss PM3
Replies: 2
Views: 694

Re: Want to switch out the field diaphragm on a Zeiss PM3

Yes, they are easy to change out. I changed out most of my plastic field diaphragms with metal ones.
by Charles
Mon Jun 26, 2023 1:46 pm
Forum: Microscopes and optics
Topic: Adding Darkfield to Old Zeiss Standard; Possible?
Replies: 4
Views: 971

Re: Adding Darkfield to Old Zeiss Standard; Possible?

Can you take a photo showing your condenser holder? It appears you have a Zeiss Standard Junior with a slip in through the bottom condenser and does not fit the slide it from the top condenser. You would need to find a compatible slip through the bottom condenser with filter carrier.
by Charles
Thu Jun 15, 2023 1:28 pm
Forum: Microscopes and optics
Topic: Need help with a stuck part on a Zeiss PM3 tube head
Replies: 26
Views: 9118

Re: Need help with a stuck part on a Zeiss PM3 tube head

Probably the easiest way is once you unscrewed the knurled part, pull off the C clamp holding the spring and plunger, then you can just pull the spring off one end and the plunger out the other end, clean everything and then reassemble.
by Charles
Wed Jun 14, 2023 5:52 pm
Forum: Microscopes and optics
Topic: Need help with a stuck part on a Zeiss PM3 tube head
Replies: 26
Views: 9118

Re: Need help with a stuck part on a Zeiss PM3 tube head

If memory serves me right, the the unit needs to be unscrewed out and not pulled out. The set screw keeps it from turning. I put tape around the exposed threads if it needs more force than just the fingers and unscrew the unit. Then soak in a solvent or WD-40 and work the plunger back and forth. The...
by Charles
Fri May 26, 2023 9:47 pm
Forum: Microscopes and optics
Topic: What is the optimal combination of 5 objectives?
Replies: 10
Views: 2961

Re: What is the optimal combination of 5 objectives?

tardibear wrote:
Fri May 26, 2023 9:58 am
if I add 1 phase contrast objective, I'll have to exchange objectives every now and then.
You can use a phase objective to use as brightfield, unless you are going to be taking high resolution images with that objective.
by Charles
Sun Jan 15, 2023 4:07 pm
Forum: Microscopes and optics
Topic: Zeiss Rotating Stage
Replies: 11
Views: 2405

Re: Zeiss Rotating Stage

There are three Carl Zeiss circular rotating stages. Two are show below: The one on the right is more common, is less expensive, has a smaller stage area and the x-y controls are on the side. The one on the left tend to be more expensive, has a larger stage area and the x-y controls are on top of th...
by Charles
Thu Aug 11, 2022 11:13 am
Forum: Microscopes and optics
Topic: Source for parfocal shims?
Replies: 26
Views: 5926

Re: Source for parfocal shims?

Try aluminum foil since they are easy to cut or punch out.
by Charles
Thu Jun 09, 2022 9:31 pm
Forum: Microscopy accessories
Topic: Carl Zeiss Optovar
Replies: 5
Views: 1969

Re: Carl Zeiss Optovar

Some Optovars have a lever in the back which swings in and out an analyser. They make some without levers with the space in the back where the lever would go. The bertrand lens is controlled by the knurled piece under the part which rotates the optovar to various positions when in the Ph position. S...
by Charles
Wed Dec 22, 2021 12:03 am
Forum: Microscopes and optics
Topic: Zeiss Turret Condenser Question
Replies: 40
Views: 24387

Re: Zeiss Turret Condenser Question

There is only one way the ring will fit with access cut outs for each post of iris position and no cut outs for the phase positions. If the cover is on and fits, it's probably on right.
by Charles
Tue Dec 21, 2021 3:17 pm
Forum: Microscopes and optics
Topic: Zeiss Turret Condenser Question
Replies: 40
Views: 24387

Re: Zeiss Turret Condenser Question

To operate the iris leaves, hold the bottom of the condenser from turning and turn only the silver ring which controls the iris opening and closing. To turn to another prism or opening, rotate the bottom of the condenser.

Observations of the phase annuli seem to be damaged/unusual.
by Charles
Mon Dec 20, 2021 11:34 pm
Forum: Microscopes and optics
Topic: Zeiss Turret Condenser Question
Replies: 40
Views: 24387

Re: Zeiss Turret Condenser Question

All the iris openings are controlled as one unit when the outer silver ring is turned. If one or more iris leaves are stuck, you will not be able to open or close any of the other ones. Most likely if they are not open and closing, they are gunked up with hardened grease or rusted leaves and need to...
by Charles
Sat Dec 18, 2021 2:22 pm
Forum: Beginner's corner
Topic: Viewing Bacteria With Bright-field Microscopy
Replies: 70
Views: 17526

Re: Viewing Bacteria With Bright-field Microscopy

I would also suggest staining is the way to go. Back in the days when sailors were coming back from shore leave with a dripping pecker and pain on peeing, a few days later, we would gram stain their secretions for diagnosis of N gonorrhea. After the gram stain, we can differentiate between gram posi...
by Charles
Sat Dec 18, 2021 12:52 am
Forum: Beginner's corner
Topic: Reichert-Jung 1820 Inverted bukb replacement
Replies: 6
Views: 2084

Re: Reichert-Jung 1820 Inverted bukb replacement

Glad you got it up and running. I'm sure your students will enjoy it.
by Charles
Sat Dec 18, 2021 12:50 am
Forum: Beginner's corner
Topic: Pushing/Pulling the X/Y Table?
Replies: 12
Views: 3186

Re: Pushing/Pulling the X/Y Table?

What you need is a rotating gliding stage. You can push, pull and turn all in one motion.
by Charles
Wed Dec 15, 2021 4:44 pm
Forum: Beginner's corner
Topic: Reichert-Jung 1820 Inverted bukb replacement
Replies: 6
Views: 2084

Re: Reichert-Jung 1820 Inverted bukb reokacement

It is on the upper arm on the left side. Just pull the rectangle black piece (Circled in Red) which holds a halogen bulb.
AO-Reichert 1820 Inverted.jpg
AO-Reichert 1820 Inverted.jpg (202.27 KiB) Viewed 2074 times
by Charles
Wed Nov 24, 2021 3:21 pm
Forum: My microscope
Topic: Help - Identifying old microscopes
Replies: 5
Views: 2699

Re: Help - Identifying old microscopes

The third one is known as a bar limb microscope made in the late 1800s. The best known bar limb was the Ross.
by Charles
Thu Oct 21, 2021 12:08 am
Forum: Microscopes and optics
Topic: Help me identify these Zeiss parts
Replies: 4
Views: 1781

Re: Help me identify these Zeiss parts

Starting from the left, -First is a rotating analyzer for POL microscopy -Second is for Darkfield stop for an inverted scope -Third is an analyzer -Forth is a single beam DIC slide which has a analyzer on one side and DIC prism on the other side. It seems to be badly delaminated. The knob on the end...
by Charles
Sat Oct 02, 2021 9:36 pm
Forum: Microscopes and optics
Topic: Can I swap the head and focusing block on this late Zeiss universal? s
Replies: 11
Views: 3383

Re: Can I swap the head and focusing block on this late Zeiss universal? s

How does the focusing block come off? this plastic knob one has the 2mm travel limit, the metal one I want to swap it with does not have that limit, so that would be nice..... To remove the focus block, remove the stage and holder. Then remove the two screws on the top plate above the stage/condens...
by Charles
Tue Sep 21, 2021 11:41 am
Forum: Microscopes and optics
Topic: Zeiss standard expansion/ upgrades
Replies: 66
Views: 26256

Re: Zeiss standard expansion/ upgrades

A Standard WL would give you most everything on the Universal but still have the foot print of the Standard

I have a spare Universal/Photomicroscope 5 objective nose turret, if you need one.
by Charles
Mon Aug 02, 2021 1:15 pm
Forum: Microscopes and optics
Topic: Zeiss standard expansion/ upgrades
Replies: 66
Views: 26256

Re: Zeiss standard expansion/ upgrades

Not sure what I'll do with the Universal - the Epi head only takes one objective at a time, so is a faff currently. Also get a strong pink cast in normal epi which can is progressively removed with polarizer and analyzer but uses a lot of light. The DF is good though. Need to source a normal nosepi...
by Charles
Fri Jul 02, 2021 12:53 pm
Forum: Specimens, samples and slides
Topic: Four videos of Proper Techniques for Permanent Slide Making of Whole Mount Insects
Replies: 13
Views: 8522

Re: Four videos of Proper Techniques for Permanent Slide Making of Whole Mount Insects

Interesting and informative series. Concerning Xylene: Where did you get yours? The Xylene (Xylol) found in hardware stores is probably the same? This is commonly used in paint cleanup and doesn't really have any more warnings on the label as turpentine. Concerning the dehydration method: Have you t...
by Charles
Tue Jun 01, 2021 1:51 pm
Forum: My microscope
Topic: Tungsten needle for diatom manipulation.
Replies: 15
Views: 6796

Re: Tungsten needle for diatom manipulation.

I have never used tungsten needles. My only concern would be if the tungsten needle may have less give/flex than the glass needle and more apt to damage a diatom frustule than a glass needle? I would have to try and see. Also glass 'erodes' whereas tungsten would not. I believe Klaus Kemp used glass...
by Charles
Sat May 15, 2021 5:18 pm
Forum: Specimens, samples and slides
Topic: Alboran Sea Diatoms
Replies: 19
Views: 8584

Re: Alboran Sea Diatoms

Test 2. I decided to try just adding a bit more mountant. Came out a little better but still some breakage, but it may have happened because the coverslip wasn't sitting right and I had to move it a couple mm. May also be the reason one of the Biddulphia moved. Taken with B&L SZ7 at 7 setting and Ca...
by Charles
Sat May 15, 2021 1:35 pm
Forum: Microscopes and optics
Topic: Adjust eyepiece width
Replies: 9
Views: 3424

Re: Adjust eyepiece width

boggsmtn wrote:
Sat May 15, 2021 9:43 am
I have Ballistol, Hoppe's, and Rem Oil and will start with one of those before taking anything apart.
Sounds like you're a gunner too! :D
Ballistol is a solvent and lubricant. Of the three I would use a drop of Ballistol on each side and then work the action back and fourth.
by Charles
Fri May 14, 2021 9:31 pm
Forum: Microscopes and optics
Topic: Adjust eyepiece width
Replies: 9
Views: 3424

Re: Adjust eyepiece width

You see the serrated area on both sides on top, just push/pull the eyepieces. It maybe very stiff from hardened grease. No need to unscrew anything.
by Charles
Sun May 09, 2021 4:03 pm
Forum: Specimens, samples and slides
Topic: Alboran Sea Diatoms
Replies: 19
Views: 8584

Re: Alboran Sea Diatoms

Charles, I tried punching the spacers from an aluminum foil (as per your post), but it did not work for me. MicroBob has suggested flat stainless shim rings. I bought some, 18x12x0.1 mm, to try. More for dry mounts, but maybe it will work with Pleurax as well. The only problem I see with rings are ...
by Charles
Sun May 09, 2021 4:00 pm
Forum: Specimens, samples and slides
Topic: Alboran Sea Diatoms
Replies: 19
Views: 8584

Re: Alboran Sea Diatoms

Would be interested to learn where you sourced the spacer discs please. I take a hyperdermic need which has the beveled end clipped straight across and poke it into thin aluminum foil or disposable pie plates. You can see the description here: https://www.microbehunter.com/microscopy-forum/viewtopi...