Re: [pinhole-discussion] Guillermo's 5 lp/mm optimum design

Hi all, Speaking of small pinhole cameras: a manufacturer of laser drilled pinholes once sent me a 0.001 pinhole good for an optimal focal length of under 0.5mm!! I couldn't possible make a camera with such focal length. I just read Michael Crichton's new novel called 'Prey' in which there

[pinhole-discussion] Slightly OT image

Hi all A pinhole friend of mine (who is not on the list) showed me a great pinhole-like portrait that one of his students made recently using an imageing device made with drinking straws. The image is on the web at: http://www.rit.edu/~photo/IFS/index-pages/IFS-55.html if you are

Re: [pinhole-discussion] Yet another lensless technique !!

Great stuff Guillermo. It must have been a bugger to poke all those different sized holes in the foil though. Just kidding ;) Tim From: Guillermo pen...@rogers.com Reply-To: pinhole-discussion@p at ??? To: pinhole-discussion@p at ??? Subject: [pinhole-discussion] Yet another

Re: [pinhole-discussion] cyanotypes using paper negatives

Hi A friend of mine makes gum, cyanotype and van dyke brown prints with paper negatives by peeling the paper backing off the resin coating. The image attaches to the resin and it very thin. You then need to use a frame to hold it flat during exposure but the exposure times are very

Re: [pinhole-discussion] close up flower shots

Camera was an old Nikon F3 with a pie tin pinhole body cap. I used Fuji Velvia and added 2 stops to what the cameras ttl meter read. There is just enough light coming through to allow some limited framing through the viewfinder but then you need to close it off before exposure. I took the

Re: [pinhole-discussion] t-shirts

I am pretty sure I have seen iron on transfer media for inkjet printers. Don't know how well it works or if it is very permanent though. Tim From: Gordon J. Holtslander hol...@duke.usask.ca Reply-To: pinhole-discussion@p at ??? To: pinhole-discussion@p at ??? Subject:

Re: [pinhole-discussion] Ultraviolet Light Pinhole Camera Project

Hi Adam, I was introduced to pinhole photography by a friend who was doing a PhD on bee vision. He used pinhole and quartz lensed cameras to record how different Australian flowers look to bees who have UV sensitive eyes. Some flowers look really plain in normal light but incredible in UV.

Re: [pinhole-discussion] camera body for zone plate

FWIW my favorite zone plate/pinhole conversion is an old Kodak folding brownie. Its nice because it was cheap, fits in your pocket, is 6x9 format, has a longish focal length, has a shutter with three speeds plus B and T settings and can take a cable release. Also the catch on the folding bit

Re: [pinhole-discussion] paper negative tricks

Quite right, sorry. The other cool thing about having a sealed pinhole camera is that you can fill the camera with water before you expose the image to increase the field of view (due to the diffraction of light at the air/water interface) Not that ot matters too much, but the phenomenon

Re: [pinhole-discussion] paper negative tricks

Hi Mike, A few years ago I made a camera out of an old 8x10 cibachrome developing tank that I had. I sealed the pinhole with a red glass filter and developed the images in the camera. The other cool thing about having a sealed pinhole camera is that you can fill the camera with water

[pinhole-discussion] Re: extremely long exposures

Hi Guillermo I am interested in using the reciprocity formula that you posted for Fuji colour film too but the formula and the formula that you use in the example are different. (1) Corrected Time = (4.44 x Time x Time) + (1.311 x Time) - 3.55 vs. (2) Corrected Time = (4.44 x Time) +