Hi guys, I'm totally newbie about optics.
I was taking a look to lens for Pi camera to try to select wich one could be suitable to watch all room, then I've seen there are following lens used with Pi camera insteas magnifing glass (to check PCB boards):
- 35mm 1:1.9
- 35mm 1:1.8
May someone tell me differences?
Other question: if I use 35mm 1:18 lens mounted on specific support, I suppose I can focus an object (x example) placed 20mm far from lens.
CCD is placed (x example) 40mm from lens.
If I change adapter, so CCD is placed (x example) 41mm or more from lens, should I change lens type?