Search found 59 matches

by Piter_
Thu Aug 06, 2020 8:59 pm
Forum: Camera systems and imaging
Topic: Zeiss Jena camera focusing problem.
Replies: 2
Views: 419

Zeiss Jena camera focusing problem.

Hi. I am using this setup. https://photos.app.goo.gl/GsykgXYFPWQhkmMP6 With MF-projective 4:1 (projection distance 125 mm) and Cannon 40D. My problem that to get sharp image I have to extend sensor eyepiece distance all the way to ~160 mm. With low magnification 6x, 3x even then I cannot get clear p...
by Piter_
Sat Apr 18, 2020 4:17 pm
Forum: Illumination Techniques
Topic: HBO 202 working current?
Replies: 2
Views: 478

Re: HBO 202 working current?

Thanks.
That was stupid of me, I have found the voltage on the Oram site, but somehow it did not come into my mind to calculate current from the power rating.
I have dedicated PSU for it, but it has 6 steps current selector between 3.3 and 5A.
Best.
Petro.
by Piter_
Sat Apr 18, 2020 2:45 pm
Forum: Illumination Techniques
Topic: HBO 202 working current?
Replies: 2
Views: 478

HBO 202 working current?

Hi.
Can someone tell me a working current for HBO202 arc lamp? May be share the datasheet which comes with it.
Thanks.
Petro.
by Piter_
Sun Mar 08, 2020 6:45 pm
Forum: Microscopes and optics
Topic: Fluoval/Amplival trinocular head. Lost magnification.
Replies: 0
Views: 5641

Fluoval/Amplival trinocular head. Lost magnification.

Hi everybody. In Fluoval, there is a trino head. Reading magnification 1.6 for oculars and 3.2 for photo output. I have measured magnification ant it is more like 1 and 2. I wonder if this 0.6 have been lost somewhere in the relay optics of the excitation cube. How does it work in Amplival if anyone...
by Piter_
Sun Mar 08, 2020 6:32 pm
Forum: Camera systems and imaging
Topic: M42 helicoids?
Replies: 3
Views: 5173

Re: M42 helicoids?

Thanks.
by Piter_
Tue Feb 04, 2020 11:13 pm
Forum: Camera systems and imaging
Topic: M42 helicoids?
Replies: 3
Views: 5173

M42 helicoids?

Hi everybody. Does anybody have experience with M42 helicoids for mounting a camera on a microscope. Something similar to this: https://www.ebay.com/itm/M52-M42-25-55mm-Adjustable-Focusing-Helicoid-Adapter-Macro-Extension-Tube-cap-/142712305849?ef_id=CjwKCAiAyeTxBRBvEiwAuM8dnTFuyOp8-Ty5u3wqhFO8ku2mR...
by Piter_
Mon Jan 06, 2020 10:22 am
Forum: Microscopes and optics
Topic: Zeiss ocular projective
Replies: 7
Views: 2905

Re: Zeiss ocular projective

Here some mote info on the subject:
https://drive.google.com/open?id=0B2sfo ... lFTlQ5Q2RF
by Piter_
Sat Jan 04, 2020 9:30 pm
Forum: Microscopes and optics
Topic: Zeiss ocular projective
Replies: 7
Views: 2905

Re: Zeiss ocular projective

Mine looks like from Zeiss projector.
https://www.google.com/url?sa=t&source= ... oqa3CaYobn
The shiny part is longer.
by Piter_
Fri Jan 03, 2020 3:44 pm
Forum: Microscopes and optics
Topic: Zeiss ocular projective
Replies: 7
Views: 2905

Zeiss ocular projective

Hi.
I have came across this ocular. Any idea then to use it?
It is over 10 cm long, not sure it will fit in my trinocular head.
Thanks.
by Piter_
Thu Jan 02, 2020 7:22 am
Forum: Microscopes and optics
Topic: Leica Sli LED Illuminator repairs
Replies: 10
Views: 1440

Re: Leica Sli LED Illuminator repairs

Try an independent serviceman.
They may do it. In Czech Republic I know at least 5 of them.
Or give it to some one who fixes TVs :)
by Piter_
Thu Jan 02, 2020 7:16 am
Forum: Microscopes and optics
Topic: Differences between various Leica DM*** models?
Replies: 12
Views: 1303

Re: Differences between various Leica DM*** models?

I shall have somewere a manual for DMRE. If I find then I will share...
by Piter_
Sun Dec 08, 2019 7:30 pm
Forum: Pictures and Videos
Topic: Fluorescent differences between photosynthetic prokaryotes and eukaryotes
Replies: 21
Views: 2349

Re: Fluorescent differences between photosynthetic prokaryotes and eukaryotes

Hi Wes. Firstly let me tell that you have made nice pictures. Now back to your question. Without knowing systematics of algae on the picture I can only make an educated guess. Most of eukaryotes will use Chlorophylls (a, b and some others) Here some examples of spectra from light harvesting protein:...
by Piter_
Sun Dec 08, 2019 4:41 pm
Forum: Microscopes and optics
Topic: Inverted microscopes cant do this....
Replies: 10
Views: 1383

Re: Inverted microscopes cant do this....

Thickness off the bottom varies between different plates, and you can find ones with 150 um thick bottom, suitable for high numerical aperture objectives . Thanks in advance for specific information: the ones with 150um thick bottom, with which high numerical aperture objective can they be used ? S...
by Piter_
Sat Dec 07, 2019 9:33 pm
Forum: Microscopes and optics
Topic: Inverted microscopes cant do this....
Replies: 10
Views: 1383

Re: Inverted microscopes cant do this....

Hi guys. Here is the main reason why inverted microscope is used in cell culture and biology. Cells are grown in petri dishes: https://www.deltaed.co.nz/wp-content/uploads/2008/06/44PDG.jpg Or other similar thing, like ibidi slides: https://ibidi.com/726-large_default/-slide-18-well-glass-bottom.jpg...
by Piter_
Thu Nov 28, 2019 12:13 pm
Forum: Microscopes and optics
Topic: How to take apart Amplival like focus drive?
Replies: 3
Views: 595

Re: How to take apart Amplival like focus drive?

Hi Bob.
Thanks.
I have been considering it. But my knowledge of German have stopped me from it.
I guess I will try, but I will need someone to help me to register. I was under impression that there was a small English branch on the German forum but was not able to find it.
Best.
Petro.
by Piter_
Tue Nov 26, 2019 8:58 pm
Forum: Microscopes and optics
Topic: How to take apart Amplival like focus drive?
Replies: 3
Views: 595

How to take apart Amplival like focus drive?

Anyone knows how to take this apart? https://lh3.googleusercontent.com/TdWWgVhVdNUM-nYhwG_IkszAF_1_2_WPwYP178m0yVfiVeaiqNezFD1CCU7DxdEav-qCFfcz9QLEldfDcM-vH907G8eIBNdqnrH9lEMUwQc9ipmhUVlQn1Zn9ZXcgi3qQ92lMPcyREQ=w2400 I tried to rotate the thing in the middle with a spanner wrench but it does not no....
by Piter_
Tue Nov 26, 2019 5:51 pm
Forum: Microscopes and optics
Topic: Lamp house grease
Replies: 7
Views: 892

Re: Lamp house grease

At the end I wrote to a microscope service and repair company located in Poland They recommended this grease. GRIZZLYGREASE No. 3 https://www.lubcon.com/en/products/greases/grizzlygrease-no-3/ I was not able to get it but I think G-1/3 will do the job. It has 175 C working temperature maximum and no...
by Piter_
Thu Nov 21, 2019 6:40 am
Forum: Microscopes and optics
Topic: Lamp house grease
Replies: 7
Views: 892

Re: Lamp house grease

It is hard to say now as I cannot start them and I do not have previous experience with them.
I have ordered some antistuck with working temperature up to 1000C. If it will be to dense I will use G-1/3 OLELUBE vaseline. It has working temperature up to 200C.
And then I will see.
by Piter_
Wed Nov 20, 2019 5:05 pm
Forum: Microscopes and optics
Topic: Lamp house grease
Replies: 7
Views: 892

Re: Lamp house grease

I am sure...
There are remainings of old grease on it, which solidified and lamp adjustment knobs ceased to move.
Here a photo of one of them from the internet.
I do not have them around to make a photo.
by Piter_
Wed Nov 20, 2019 2:02 pm
Forum: Microscopes and optics
Topic: Lamp house grease
Replies: 7
Views: 892

Lamp house grease

Hi everybody.
I am regreasing two Zeiss lamp houses.
Any recommendation for a grease?
Thanks.
Petro
by Piter_
Wed Nov 13, 2019 3:55 pm
Forum: Camera systems and imaging
Topic: Any experience with this camera?
Replies: 2
Views: 2054

Re: Any experience with this camera?

Thanks
I think I will get one for myself.
Best.
Petro.
by Piter_
Sat Nov 09, 2019 10:34 pm
Forum: Camera systems and imaging
Topic: Any experience with this camera?
Replies: 2
Views: 2054

Any experience with this camera?

Hi.
Does anybody has experience with this camera?

https://www.ebay.com/itm/14MP-TV-HDMI-U ... SwOIxcahJE
by Piter_
Fri Nov 08, 2019 4:43 pm
Forum: Microscopes and optics
Topic: ocular cans?
Replies: 3
Views: 2554

Re: ocular cans?

Thanks.
Great proposals...
by Piter_
Mon Oct 28, 2019 5:36 pm
Forum: Microscopes and optics
Topic: ocular cans?
Replies: 3
Views: 2554

ocular cans?

Hi everybody.
There are objective cans. Is there anything similar for 23mm oculars?
Thanks.
Petro
by Piter_
Mon Oct 28, 2019 5:28 pm
Forum: Microscopy accessories
Topic: Olympus U-CFU Confocal Unit
Replies: 1
Views: 4059

Re: Olympus U-CFU Confocal Unit

Better to ask on confocal microscopy mailing list.
I don't think here many confocal users....
Best.
Petro.
by Piter_
Sat Oct 26, 2019 4:22 pm
Forum: For forum members who want to buy and sell equipment
Topic: Ceramic rods
Replies: 3
Views: 2182

Re: Ceramic rods

Thanks
I was searching eBay for rods. But it did not come into my mind to look for tubes.
Best.
Petro