Jitterbug Member Joined Dec 2, 2010 Messages 27 Format 35mm Aug 26, 2011 #1 Hello I was wondering if anyone knew if one could use a pinhole camera for making microfiche sheets, with a rediction of 1/10 or 1/20 of the original.
Hello I was wondering if anyone knew if one could use a pinhole camera for making microfiche sheets, with a rediction of 1/10 or 1/20 of the original.
polka Member Joined May 1, 2008 Messages 167 Format Medium Format Aug 26, 2011 #2 My evaluation : A4 / 10 -> 30x20mm² reasonable focal for this size : 40mm optimal pinhole for this focal : 0,24mm resolution : 0,3mm blur circle separation : approximately 100x70 pixels Is this OK ? I think NO A4 / 20 would be worse ; why not use a lens ? Bye Paul
My evaluation : A4 / 10 -> 30x20mm² reasonable focal for this size : 40mm optimal pinhole for this focal : 0,24mm resolution : 0,3mm blur circle separation : approximately 100x70 pixels Is this OK ? I think NO A4 / 20 would be worse ; why not use a lens ? Bye Paul
OP OP Jitterbug Member Joined Dec 2, 2010 Messages 27 Format 35mm Aug 26, 2011 #3 Thank you. This was mostly more of a "Can I do it?" sort of thing.