I've been meaning to drill a lens cap (or thin plastic disk) and attach an aperture with a small hole -- say 300 - 500 um -- to improve depth of field for similar experiments. You should be able to achieve f128 with a small enough hole. And since your objects are not likely to move you can exposure with multiple flashes on 'B'.
A way to make an aperture might be to prick a hole in aluminium foil and stick that over a larger hole in the cap or disk. To blacken the foil, after the work has been done, hold it over burning benzene (perhaps paraffin would do) in the lid of a jar. To be carried out in the open air away from your dwelling. Now we need an expert to calculate the size of the holes needed. Don _______________ Dr E D F Williams http://personal.inet.fi/cool/don.williams Author's Web Site and Photo Gallery See New Pages "The Cement Company from HELL!" Updated: August 15, 2003 ----- Original Message ----- From: "J. C. O'Connell" <[EMAIL PROTECTED]> To: "pentax discuss" <[EMAIL PROTECTED]> Sent: Monday, November 03, 2003 10:42 AM Subject: Macro photography with enlarging lenses > I took a few shots with my 135mm El Nikkor mounted > on a autobellows for the first time today. > > Pentax SL > Tmax 100 > F22 > Vivitar 285 Flash Full power manual > > http://jcoconnell.com/temp/32pickup01s.jpg > > http://jcoconnell.com/temp/cobra01s.jpg > > http://jcoconnell.com/temp/whtmclaren01s.jpg > > I like the perspective better than the 80mm exeriments > and the lighting is more even because the flash was > further from the cars. Depth of field is still a > problem, next time I will try F32 and switch to > Tmax 400. > > JCO > > -------------------------------------------------------------------------- -- > J.C. O'Connell mailto:[EMAIL PROTECTED] http://jcoconnell.com > -------------------------------------------------------------------------- -- >
