Search found 323 matches

by ImperatorRex
Wed Sep 23, 2020 4:24 pm
Forum: For forum members who want to buy and sell equipment
Topic: Zeiss Universal or Phomi "Large Field Nosepiece"
Replies: 1
Views: 729

Re: Zeiss Universal or Phomi "Large Field Nosepiece"

Price reduced.
Pls. feel free to contact me by PM if your are interested or if you have any questions.
by ImperatorRex
Fri Sep 11, 2020 4:42 pm
Forum: Pictures and Videos
Topic: Closterium
Replies: 10
Views: 620

Re: Closterium

Love your photo. Very plan image, also like to see the vacuoles at the cell tips with crystals of barium or calcium sulfate.
by ImperatorRex
Sun Sep 06, 2020 7:34 am
Forum: Pictures and Videos
Topic: Arcella discoides
Replies: 6
Views: 453

Re: Arcella discoides

Like it, well done!
by ImperatorRex
Fri Aug 28, 2020 6:15 pm
Forum: Pictures and Videos
Topic: Synedra ulna
Replies: 4
Views: 211

Re: Synedra ulna

Great work! Thanks for sharing 75RR!
by ImperatorRex
Thu Aug 13, 2020 4:14 pm
Forum: My microscope
Topic: My Zeiss Microscopes
Replies: 94
Views: 48673

My Zeiss and Olympus Microscopes

Recently there was the question why to buy (second hand) microscopes from one of the big 4 manufacturers. I tried to answer in the forum, but I stopped to write a response. I am simply not able to just focus on the rationals, I found myself getting very emotional when it comes to my microscope(s). S...
by ImperatorRex
Sun Aug 09, 2020 9:23 am
Forum: Pictures and Videos
Topic: A very beautiful creature (Phacus)
Replies: 13
Views: 1155

Re: A very beautiful creature (Phacus)

Thank you for sharing this interesting video.
by ImperatorRex
Fri Aug 07, 2020 9:43 am
Forum: Pictures and Videos
Topic: Paramecium caudatum?
Replies: 5
Views: 562

Re: Paramecium caudatum?

Hello Jan, nice video, looks like Paramecium but you will need higher n.A and less water between cover glass to view the details like Macro and Micronucleus that are further important criteria to classify. (P. Caudatium has one Micro and Marconucleus). A bit small for P. caudatum, so could maybe als...
by ImperatorRex
Wed Aug 05, 2020 7:13 pm
Forum: Pictures and Videos
Topic: Desmid Pleurotaenium
Replies: 5
Views: 466

Re: Desmid Pleurotaenium

Thank you janvangastel and KD for your nice comments.
by ImperatorRex
Wed Aug 05, 2020 1:54 pm
Forum: Pictures and Videos
Topic: Desmid Pleurotaenium
Replies: 5
Views: 466

Desmid Pleurotaenium

Not too much interesting that I found in a sample taken from a quarry lake nearby, but finally I was glad that I found a nice algae. I noted that there is also a layer of mucus or slime surrounding the desmid...also seems there are some bacteria lifing in the mucus layer. https://up.picr.de/39162568...
by ImperatorRex
Mon Aug 03, 2020 8:40 pm
Forum: Pictures and Videos
Topic: Invasion of Trachelomonas sp.?? In my sample from the sea!
Replies: 4
Views: 627

Re: Invasion of Trachelomonas sp.?? In my sample from the sea!

Nice video. Could be Trachelomonas, but a higher magnification with more details could help better for ID.

I also made a video some time ago where I described some characteristics of Trachelomonas hispida:
https://www.youtube.com/watch?v=gcaEFus_sTU
by ImperatorRex
Thu Jul 16, 2020 4:24 am
Forum: Pictures and Videos
Topic: Grammatophora sp. (Tentative ID)
Replies: 8
Views: 792

Re: Grammatophora sp. (Tentative ID)

Looks great 75RR!
by ImperatorRex
Wed Jul 15, 2020 5:49 pm
Forum: Microscopes and optics
Topic: Strain free eyepiece
Replies: 12
Views: 782

Re: Strain free eyepiece

Procedure is very intuitive and well described by Charles. And since the result of your camera setup seems to work very well, the shorter camera distance seems not really to be an issue obviously. It is funny...if you like it difficult and complex you could calculate the lift-off distance for the oc...
by ImperatorRex
Wed Jul 15, 2020 4:04 pm
Forum: Microscopes and optics
Topic: Strain free eyepiece
Replies: 12
Views: 782

Re: Strain free eyepiece

Hello 75RR, Remembered to measure the distance from the top of the eyepiece to the camera sensor. It is 52mm I personally do not have any experience with lifting up the ocular for direct projection to the camera sensor. I only have read the following advise (tried to translate from german): "(Optica...
by ImperatorRex
Sun Jul 12, 2020 11:52 am
Forum: Microscopes and optics
Topic: Strain free eyepiece
Replies: 12
Views: 782

Re: Strain free eyepiece

Hi 57RR,
not sure actually what you mean with strain free? You mean the KPL "pol" eyepieces? These eyepieces just have a "cross" inside and a "pin" at the barrel to match exact position into the fitting notch/slot at the tube of the tube head. But optically they are the same.
by ImperatorRex
Sun Jul 12, 2020 11:07 am
Forum: Microscopes and optics
Topic: Strain free eyepiece
Replies: 12
Views: 782

Re: Strain free eyepiece

Hi 75RR, what do you consider as "normal" Eyepiece? Beside the KPL for Zeiss standards there have been "C" and "CPL" eyepieces. But image quality of the C or CPL type ocular will suffer, so certainly not recommended for a photo adaption. So you would use KPL oculars. Since you do not use a Camera ob...
by ImperatorRex
Fri Jul 10, 2020 2:51 pm
Forum: Microscopes and optics
Topic: Comparison of AmScope's Plan & Non-Plan Objectives
Replies: 19
Views: 1505

Re: Comparison of AmScope's Plan & Non-Plan Objectives

Best would be to use a kind of "mash" or specimen with lines for a comparison. Example ist here: http://www.microbehunter.com/microscopy-forum/viewtopic.php?f=24&t=5930&start=60#p71902 But this of coarse raises the question where to get such. But maybe somebody has another idea? Micrometer slides ar...
by ImperatorRex
Fri Jul 10, 2020 2:28 pm
Forum: Microscopes and optics
Topic: Roughly when did microscope manufacturers stop making their own glass?
Replies: 10
Views: 704

Re: Roughly when did microscope manufacturers stop making their own glass?

I'm guessing that there is a sand resource of a specific quality near to Wetzlar and Jena too, that prompted the origins of those areas as optical centers. Sounds logical. But the german optical manufacturers where founded back to mid. of the 19th century. All the optical glas was imported from Eng...
by ImperatorRex
Thu Jul 09, 2020 4:07 am
Forum: For forum members who want to buy and sell equipment
Topic: -
Replies: 0
Views: 484

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by ImperatorRex
Wed Jul 01, 2020 7:14 pm
Forum: Pictures and Videos
Topic: Dinoflagellate
Replies: 8
Views: 642

Re: Dinoflagellate

Very well done 75RR! Great catch of the different panes.
Thanks for your docu.
by ImperatorRex
Mon Jun 29, 2020 4:21 pm
Forum: For forum members who want to buy and sell equipment
Topic: Zeiss Universal or Phomi "Large Field Nosepiece"
Replies: 1
Views: 729

Zeiss Universal or Phomi "Large Field Nosepiece"

I am selling a rare Zeiss Universal or Phomi "Large Field Nosepiece" in excellent condition.

Please have a look on Ebay or contact me if your are interested:
http://www.ebay.de/itm/124342961904?ssP ... 1555.l2649
by ImperatorRex
Mon Jun 29, 2020 4:11 pm
Forum: Microscopes and optics
Topic: Best DIC options?
Replies: 57
Views: 4440

Re: Best DIC options?

Does anyone know about what plan field sizes Zeiss supported in the various eras? My impression is that they didn't get to 20mm in objectives, prisms, heads, etc. until somewhat later in the game?? It seems that even the old Zeiss West "finite" Plan Objectives itself were designed with a "reserve" ...
by ImperatorRex
Sun Jun 28, 2020 8:33 pm
Forum: Microscopes and optics
Topic: Best DIC options?
Replies: 57
Views: 4440

Re: Best DIC options?

Was wondering if they were the same. These are the ones on my 46 52 85, not standard then? They are the same, just different kind of numbering. Maybe Zeiss recognized that all the different prism numbers are just confusing, so printing matching condensor numbers on the prisms would be more transpar...
by ImperatorRex
Sun Jun 28, 2020 6:19 pm
Forum: Microscopes and optics
Topic: Best DIC options?
Replies: 57
Views: 4440

Re: Best DIC options?

some more details to add: https://up.picr.de/38893874qh.jpg 46 52 85 - is the condensor with the 1.4 n.A Frontlense and the matching Wollastan prisms. 46 52 73 - is the condensor with the 0.63 n.A Frontlense and the matching Wollastan prisms. Both condensors could be installed on conventional or inv...
by ImperatorRex
Sat Jun 27, 2020 8:29 am
Forum: Microscopes and optics
Topic: Best DIC options?
Replies: 57
Views: 4440

Re: Best DIC options?

75RR wrote:
Sat Jun 27, 2020 6:53 am
That is an unhelpful numbering sequence :)
Indeed, the later (newer) invitinite Zeiss scope seem to have smaller numbers than the old finite stuff.
by ImperatorRex
Sat Jun 27, 2020 5:53 am
Forum: Microscopes and optics
Topic: Best DIC options?
Replies: 57
Views: 4440

Re: Best DIC options?

75RR wrote:
Sat Jun 27, 2020 5:01 am
Might be a mix of generations. ....
Image
The very early ZEISS Axio (..skopes) had an DIC Condenser 44 52 48 - similiar looking as on the photo.
by ImperatorRex
Thu Jun 25, 2020 8:35 pm
Forum: Microscopes and optics
Topic: Best DIC options?
Replies: 57
Views: 4440

Re: Best DIC options?

Some notes on Olympus BX DIC: there are 3 different options available: - high Contrast DIC - standard DIC - high resolution DIC So it really depents what specimen you have to get best results: Great comparison and article on the Olympus DIC (standard versus high resolution) was just recently present...
by ImperatorRex
Fri Jun 19, 2020 4:44 pm
Forum: Pictures and Videos
Topic: Prorocentrum lima video
Replies: 4
Views: 1268

Re: Prorocentrum lima video

Very nice video 75RR. You always find stuff new interesting stuff :-) Wonder if there are really bacteria activities inside? Maybe a closer look at, e.g. with leass fluid layer could clarify. Could also be some metabolic products - e.g. when spotting closterium or other algae, you see this kind of m...
by ImperatorRex
Fri Jun 19, 2020 9:37 am
Forum: Microscopes and optics
Topic: Zeiss Standard - help
Replies: 4
Views: 1294

Re: Zeiss Standard - help

Well explained Bob. In addition a photo will help to outline the details:
https://www.mikroskopie-forum.de/index.php?topic=4004.0
by ImperatorRex
Thu Jun 18, 2020 9:22 am
Forum: Identification help
Topic: Amoeba? (Marine sample)
Replies: 8
Views: 1449

Re: Amoeba? (Marine sample)

Really strange thing 75RR. Would be important to see if the object moves or change the pseudopodia.
by ImperatorRex
Sun Jun 14, 2020 5:27 pm
Forum: For forum members who want to buy and sell equipment
Topic: Cooke Troughton and Simms - CTS Eyepieces 10x comp
Replies: 0
Views: 706

Cooke Troughton and Simms - CTS Eyepieces 10x comp

If somebody is interested in a pair of Eypepieces from CTS 10x comp may just contact me.