Search found 7816 matches

by ChrisR
Tue Feb 13, 2024 6:25 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: Debunking the high NA / coverslip correction myth
Replies: 73
Views: 31817

Re: Debunking the high NA / coverslip correction myth

Very good result :)
These pbjectives' WD is about 2mm, isn't it?
So Macrero, how did you arrange the lighting? Table tennis ball, sort of thing?
Apologies if you already posted it out somewhere.
by ChrisR
Sun May 21, 2023 5:42 pm
Forum: Photography Through the Microscope
Topic: Powers of 10: 3-axis MEMS accelerometer
Replies: 1
Views: 686

Re: Powers of 10: 3-axis MEMS accelerometer

Fascinating stuff.
There's a rather old (2002) but interesting pdf here:
https://www.lboro.ac.uk/microsites/mech ... o-mems.pdf
by ChrisR
Sat Apr 29, 2023 7:08 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: MEMS chip
Replies: 5
Views: 1433

Re: MEMS chip

Very interesting Andy.
I look forward to understanding more about how these things work. Right now it's too near bed time!
I'm not really clear which parts are floating...
by ChrisR
Wed Apr 19, 2023 3:09 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: SONY AWARD
Replies: 25
Views: 4373

Re: SONY AWARD

Congratulations are well deserved, ADi, those are stand-out images. It's good to see that your dedication has paid off.
by ChrisR
Thu Mar 23, 2023 3:14 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: 1908 gold coin
Replies: 11
Views: 3022

Re: 1908 gold coin

I'm always surprised to find how difficult it is to tell whether the design is incuse or, um, excuse. The word should be excuse.

Splendid coin, looking glorious, you've done it proud.
by ChrisR
Sun Mar 19, 2023 4:46 pm
Forum: Community Members and Friends
Topic: Hello from Norfolk UK
Replies: 6
Views: 2092

Re: Hello from Norfolk UK

Really nce fingi, I don't think I've seen those . I know this was a while ago - sorry I didn't see it. I watched Allan Walls' video, which is all fine, but one thing he didn't mention: When you use your nice wide aperture for resolution, the cone of light from the aperture to a point on the inside o...
by ChrisR
Sun Jan 29, 2023 6:27 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: A Canon MPE-65 alternative?
Replies: 10
Views: 2076

Re: A Canon MPE-65 alternative?

As far as I know, it's impossible to use an MP-E on a Nikon, unless using something like a "Z" ring which would introduce an extension it's not designed for. I am out of date though. You'd also need a Canon body to get the lens to stop down :( . Far too much trouble! The Canon 35mm bellows lens (out...
by ChrisR
Sun Jan 29, 2023 5:59 pm
Forum: Technical and Studio Photography -- Macro and Close-up
Topic: New here with 2 shots
Replies: 4
Views: 1315

Re: New here with 2 shots

Welcome to the forum, Dario!
by ChrisR
Wed Nov 23, 2022 5:47 am
Forum: Equipment Exchange
Topic: Nikon EL-Nikkor 50mm and 80mm for free
Replies: 10
Views: 1771

Re: Nikon EL-Nikkor 50mm and 80mm for free

That's generous offer! Intriguing, but for the Atlantic ocean.
Many thread-lockers will go gooey with a mild amount of heat, even just a hair dryer.

Have a good trip!
by ChrisR
Sat Nov 05, 2022 8:54 pm
Forum: Beginners Macro
Topic: Wasted money or...
Replies: 8
Views: 2926

Re: Wasted money or...

5mm at 5x means 1mm on subject. Perhaps the angle of the mounting plate changes on the rail as the lead screw goes round. As suggested I'd try to see where the misalignment is and quiz the seller. Tip - the eccentricity is likely to vary along the rail. You might be best off using it near one end. (...
by ChrisR
Thu Oct 27, 2022 10:17 am
Forum: Macro & Microscopy Articles
Topic: 101 steps to better histology
Replies: 1
Views: 1637

101 steps to better histology

https://www.leicabiosystems.com/en-gb/k ... -practice/


Leica so it should be good, I'm afraid I haven't tried even one of the 101 :cry:
by ChrisR
Thu Sep 22, 2022 7:51 am
Forum: Nature Photography -- Macro and Close-up
Topic: Rainforest macros - Closing set
Replies: 2
Views: 1182

Re: Rainforest macros - Closing set

Very enjoyable. set.

Beautiful little vine snake, I looked him up to see how little - nobody's saying. I assume 10mm or less diameter?
Evidently the taxa were only recently set out.
by ChrisR
Tue Jul 26, 2022 7:34 am
Forum: Photography Through the Microscope
Topic: Fibroblast cells
Replies: 3
Views: 993

Re: Fibroblast cells

Impressive.
Your profile says "Junk colector". Do you have a new toy? :mrgreen: