Search found 7764 matches

by ChrisR
Mon Jul 20, 2020 2:30 am
Forum: Photography Through the Microscope
Topic: plant leaf stem cross sections
Replies: 12
Views: 2060

Re: plant leaf stem cross sections

Thanks CHarles. It sounds like your machine didn't have oscillation frequency adjustment, though some do. This Leitz document gives some numbers: https://drp8p5tqcb2p5.cloudfront.net/fileadmin/downloads_lbs/Leica%20VT1000%20S/Brochures/95.8539_Rev_B_Brochure_Vibratome_Series_EN.pdf The frequencies a...
by ChrisR
Sun Jul 19, 2020 12:35 pm
Forum: General Discussion Forum and Community Announcements
Topic: On Lockdown
Replies: 252
Views: 17474

Re: On Lockdown

The admin team have decided to close the discussion in the "On Lockdown" thread.
Sadly, we feel it has become troublesome beyond its value to the forum.
by ChrisR
Thu Jul 16, 2020 6:30 am
Forum: Photography Through the Microscope
Topic: plant leaf stem cross sections
Replies: 12
Views: 2060

Re: plant leaf stem cross sections

Hi Charles,.. I've always wondered, does a Vibratome tend to cut with less need for suport of the material? I would assume so, especially if the settings were just right. Can one alter the frequency and stroke of the commercial machine? It wouldn't be too difficult to make something with both being ...
by ChrisR
Thu Jul 09, 2020 3:23 am
Forum: General Discussion Forum and Community Announcements
Topic: On Lockdown
Replies: 252
Views: 17474

Re: On Lockdown

A fascinating study of three "super-spreader" events helps reveal spreading mechanisms: https://english.elpais.com/spanish_news/2020-06-17/an-analysis-of-three-covid-19-outbreaks-how-they-happened-and-how-they-can-be-avoided.html?campaign_id=154&emc=edit_cb_20200708&fbclid=IwAR38ut7ey-guKjrL2TSDPSU...
by ChrisR
Sun Jun 07, 2020 3:17 am
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: weevil 5x (high resolution)
Replies: 8
Views: 1349

More detail than the weevil knows about! Super. ;)
by ChrisR
Sat May 30, 2020 3:35 pm
Forum: Beginners Micro
Topic: advice for Nikon Labophot trinocular head
Replies: 29
Views: 4306

I have to go though this issue as I have a bunch of the bits... One trick I learned from Charlie Krebs: If you use a Pentacon microscope adapter which is 42mm at the top, the outer diameter of the silver coloured tubes is a decent fit inside the trinoc tube of the Nikon head. They're matt black insi...
by ChrisR
Sat May 30, 2020 2:31 pm
Forum: Equipment Discussions
Topic: Test wafer distribution: Many features, includes res chart
Replies: 80
Views: 9797

Sent my details but it looks like I missed the list!
by ChrisR
Fri May 15, 2020 2:44 pm
Forum: Equipment Discussions
Topic: Why do I get image corruption?
Replies: 31
Views: 2754

FWIW - my local computer shop would tell you to put your memory into single channel mode rather than multichannel, to avoid nonspecific memory problems.
I understand that's only an option if you have spare slots.
I can't add any further comment!
by ChrisR
Wed May 13, 2020 11:57 am
Forum: General Discussion Forum and Community Announcements
Topic: On Lockdown
Replies: 252
Views: 17474

Half an hour in an oven at 70°C "kills" the virus on a mask, and the materials apparently survive that OK. Other treatments are available... Claims - Use of far-UV (~220nm) may develop - its penetration at around 1µm isn't enough to get through the tear layer on the eye so it's claimed to be safe. T...
by ChrisR
Fri May 01, 2020 4:35 pm
Forum: Equipment Exchange
Topic: Found : Mitutoyo m plan apo 5x
Replies: 3
Views: 1522

Mine from them is good, and I know others have found theirs to be fine too.
by ChrisR
Thu Apr 30, 2020 4:05 am
Forum: Equipment Discussions
Topic: Nikon BD Plan 40x/0.65 210/0 vs ED Plan
Replies: 9
Views: 2183

I can't think of an ED Plan objective. Where have you seen it?
by ChrisR
Tue Apr 28, 2020 7:02 pm
Forum: General Discussion Forum and Community Announcements
Topic: On Lockdown
Replies: 252
Views: 17474

Should be an interesting lecture:
https://www.gresham.ac.uk/lectures-and- ... 667ed09c02

Pls say if it's blocked wherever you are.
by ChrisR
Mon Apr 27, 2020 8:29 am
Forum: Nature Photography -- Macro and Close-up
Topic: Technical exercise with 7 diopter achromat
Replies: 3
Views: 1579

Hairy enough to be a tachinid.
Try Chris Raper - a member here.