Search found 4 matches

by manu de hanoi
Tue May 29, 2018 12:46 am
Forum: Photography Through the Microscope
Topic: more DIY polarizer tricks & crystal growth
Replies: 0
Views: 1015

more DIY polarizer tricks & crystal growth

I hope it's ok to post videos on this forum. There are already many videos on youtube about DIY polarizers. I will show here a few specific tricks (smartphone polarizers, glass support, hair dryer, freezing wand, psychedelic field) and a lot of crystal growth. Crystals start at 5:31 https://www.yout...
by manu de hanoi
Fri May 11, 2018 6:54 am
Forum: Macro and Micro Technique and Technical Discussions
Topic: Looking for help with specimen contrast / lighting
Replies: 15
Views: 4867

-are the angled parts blurry just in the final stack or are they blurry too in individual layers ? -DSLR being closer to the objective as pictured should help you getting good depth of field at the expense of magnification/resolution. -250 pics for a stack sound like a lot, sometimes less is more (b...
by manu de hanoi
Fri May 11, 2018 6:38 am
Forum: Frequently Asked Questions (FAQs)
Topic: FAQ: Stopping down a lens combo
Replies: 28
Views: 35659

when you stop behind the front lens, you reduce the NA (I undesrtand the NA is defined by the angle of the most outer rays), that would seem, theoretically, to be more damaging to the resolution than stopping behind the back lens. Perhaps the blur you get by stopping behind the back lens could be re...