Search found 1119 matches

by Ichthyophthirius
Wed Feb 24, 2021 9:55 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: What's in the name: filter puzzles
Replies: 4
Views: 1333

Re: What's in the name: filter puzzles

Hi, I suspect the Schott glass names are chronological. They have a 150+ year history, it would be logical to stick to 1 name = 1 glass rather than constantly renaming them according to their property lineup. Apart from that, Schott: UG: Black and blue glasses, UV transmitting BG: Blue, blue-green, ...
by Ichthyophthirius
Mon Feb 22, 2021 2:52 pm
Forum: Equipment Discussions
Topic: Does anyone have the Laowa 100mm x2 macro lens?
Replies: 20
Views: 3038

Re: Does anyone have the Laowa 100mm x2 macro lens?

The copy I had had thin patches of grease but not a thick layer.

You're right, it should be used with the Laowa front filter. Otherwise, it will collect lots of dust sticking to the grease film.
by Ichthyophthirius
Sat Feb 13, 2021 4:43 am
Forum: Equipment Discussions
Topic: Laowa 2x problem: forced crop mode on RF mount
Replies: 2
Views: 225

Re: Laowa 2x problem: forced crop mode on RF mount

klevin wrote:
Fri Feb 12, 2021 1:32 pm
Is crop so bad?
{-( Unacceptable :D But in all seriousness, crop mode is 10 MP on the Canon RP. That's not using the lens to it's full potential, as it is supposedly quite good on full frame.
by Ichthyophthirius
Sat Feb 13, 2021 4:04 am
Forum: Equipment Discussions
Topic: Stereo Zoom Microscope - What to buy?
Replies: 11
Views: 497

Re: Stereo Zoom Microscope - What to buy?

Hi Owen, Thank you for the clarification. I think the GXM is a none-starter. The magnification range you get is between 1x - 4.5x. At the higher end, these stereo microscopes optics are usually not very good; so the usable range is maybe 1x - 3x. There are many other affordable and superior optics a...
by Ichthyophthirius
Fri Feb 12, 2021 12:47 pm
Forum: Equipment Discussions
Topic: Laowa 2x problem: forced crop mode on RF mount
Replies: 2
Views: 225

Laowa 2x problem: forced crop mode on RF mount

Hi, I'm testing a Laowa 2x macro lens (EF version with automatic aperture) on my Canon RP camera (corrected through an automatic EF-RF adapter). The lens enforces 1.6x crop mode on the RP, in the same way that EF-S lenses can only be used in crop mode on this full frame camera. I have gathered from ...
by Ichthyophthirius
Thu Feb 11, 2021 12:59 pm
Forum: Equipment Discussions
Topic: Stereo Zoom Microscope - What to buy?
Replies: 11
Views: 497

Re: Stereo Zoom Microscope - What to buy?

Hi Owen, What's been you experience with stacking so far? In broad terms, stereo microscopes are not ideal for stacking because of the inclined optical axis (reduces image quality and stifts the image during stacking). Alternative methods (low magnification: macro lens + focus bracketting; higher ma...
by Ichthyophthirius
Wed Feb 10, 2021 10:47 am
Forum: Equipment Discussions
Topic: How to achieve Kohler with an Orthoplan
Replies: 5
Views: 242

Re: How to achieve Kohler with an Orthoplan

Hi David,

I agree; just post a few images of your setup. Something stange is going on as that should work well (with an NA 0.9 condenser front lens).

Do you have any other Leitz condeners that can serve as a reference?

Regards, Ichty
by Ichthyophthirius
Wed Feb 10, 2021 4:22 am
Forum: Equipment Discussions
Topic: Cleanest microscope slides for D/F microscopy
Replies: 10
Views: 1174

Re: Cleanest microscope slides for D/F microscopy

best technique for cleaning microscope slides for spotless Dark Field imaging? Hi, For cleaning at home or in a lab? Some techniques are too dangerous to do without the necessary knowledge and PPE, but there are alternatives for doing it at home. Basically, mild alkali or acid + ultrasonic bath str...
by Ichthyophthirius
Sat Feb 06, 2021 7:42 pm
Forum: Equipment Discussions
Topic: My setup - need some lighting advice
Replies: 18
Views: 988

Re: My setup - need some lighting advice

Someone in the forum linked to these DIY Bauersfeld light domes recently: https://journals.plos.org/plosone/artic ... ne.0153426

"A Scalable and Modular Dome Illumination System for Scientific Microphotography on a Budget."
by Ichthyophthirius
Fri Feb 05, 2021 4:37 pm
Forum: Macro and Micro Technique and Technical Discussions
Topic: Nikon CFW & CFWN eyepieces->Difference?
Replies: 11
Views: 272

Re: Nikon CFW & CFWN eyepieces->Difference?

For example the Nikon CFW10x / 20 and a Nikon CFWN10x / 20 eyepiece. Hi Simon, There either was no "CFW10x / 20" or it was very rare. There are a number of Ebay listings of this eyepiece but they are all incorrect. The "CFW 10x" had FN 18. It was part of the first generation of CF optics in the 197...
by Ichthyophthirius
Thu Feb 04, 2021 5:04 pm
Forum: Equipment Discussions
Topic: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long
Replies: 11
Views: 1049

Re: What even is this: Plan Apo 40x/1.0 W infinity f=180 unbranded m25 75mm long

Hi, This looks like it comes from one of the new all-in-one automated biological microscope systems. They often have just one objective (40x or 50x) and a zoom system and automated immersion dispensers like yours. For example the Zeiss Celldiscoverer https://www.zeiss.com/microscopy/int/products/ima...
by Ichthyophthirius
Mon Nov 30, 2020 12:45 pm
Forum: Equipment Discussions
Topic: Nikon Eclipse C-CU Universal Condenser and DIC literature
Replies: 5
Views: 1611

Re: Nikon Eclipse C-CU Universal Condenser and DIC literature

There are a few snippets here, though none of them are the original Nikon instructions for the C-CU: https://www.esf.edu/pbe/ncb/documents/LightMicroscopyLab.pdf http://www.mvi-inc.com/wp-content/uploads/D-FL_EpiFL-Attachment.pdf https://sharedresources.fredhutch.org/sites/default/files/nikon_e800_i...
by Ichthyophthirius
Sun Nov 29, 2020 1:24 pm
Forum: Equipment Discussions
Topic: Awakening a Leitz SM microscope
Replies: 22
Views: 2955

Re: Awakening a Leitz SM microscope

To me, the images look great. You clearly have an 'eye' for photography (I also like your photos of the microscopy equipment).

You could move on making your own slides (pond life; diatoms; plant sections etc. are interesting) or experiment with different contrast methods (as mentioned above) or both.
by Ichthyophthirius
Sun Nov 29, 2020 12:02 pm
Forum: Equipment Discussions
Topic: Awakening a Leitz SM microscope
Replies: 22
Views: 2955

Re: Awakening a Leitz SM microscope

Hi Toni, I know that illuminating technics, post-production, quality of sensors are determinant, but I'm afraid that that general optic quality of my tool should be the real limiting factor. I'd like to assure you that this microscope will not be your limiting factor! As long as this microscope and ...
by Ichthyophthirius
Tue Nov 24, 2020 8:13 pm
Forum: Equipment Discussions
Topic: 160mm vs infinity objectives
Replies: 3
Views: 1484

Re: 160mm vs infinity objectives

Hi Henry, For what purpose? Biological objectives for brightfield transmitted illumination? Or more specialised contrast methods? Most major manufacturers switched their biological objectives from 160 mm to infinite tube length in the late 1980s / early 1990s. The early infinite objectives are somet...