[pinhole-discussion] Pinhole mounted in bodycap on EOS cameras
I am wondering if any of you more experienced people on the list can help me with this minor challenge. I will like to mount a pinhole on a bodycap and put it on one of my EOS bodies. I have been searching the net and have found a lot of information for my other pinholeprojects (4x5", 6x7) but not on this particular subject. My questions are: How do I measure the distance from the filmplane til the pinhole? What will the optimal pinholediameter be? Will my built in exposure be able to measure the light and set a "correct" exposure? What else should I think of? Regards Rune Norway
[pinhole-discussion] Determining exposure beyond.....................
Hi list! Can anybody help me with how to determine exposure when correcting for resiprosity failure when the measured esposuretime exceeds that of the table from the filmvendor? For instance when using Ilford HP5 Plus, the film data sheet gives the added time for resiprosity failure until initial measured 35 secs(corrected for pinhole f stop). How can I calculate the "correct" exposure time beyond this point? Tiral and error until now has not been satisfactory for me. Any help will be appreciated. Rune Norway __\/__ ./ ^ _ \. |\|(o)(o)|/| #--.OOOo--oo--oOOO.# # Rune Tallaksen # # # # # #---Oooo.--# .oooO ( ) ( ) )/ \( (_/ \_)
[pinhole-discussion] PInhole problem - flaring?
I have now "shot" my first roll of pinhole on my customized Ricohcord camera with a special result I've not seen before on my pinholes. There is a distinct flaring in the centre of the negative. Comments anyone? Rune Norway
[pinhole-discussion] Calculating f-stop for pinhole camera
When making a pinhole by means of a needle one usually know the pinholesize by the needle size used. I seem to recall that there is another way to do get to know the exact pinholesize but cannot remember the formula used. The method was described as follows. Mount the pinhole sheet in a slideframe, place it in a slideprojector. Then by measuring the distance from the pinhole in the slideframe and to the projector screen and the diameter of the projected pinhole on the screen, by means of a formula it was possible to find the exact pinhole size. Anybody out there that know which formula (s) to use?? Rune Tallaksen Norway
