Sorry if I wasn't clear. I tape the actual pinhole--drilled, poked or otherwise put through brass shim stock--over a small hole in the disc of foamcore board. Which is exactly what you say it is. Good luck, Howard Wells
Dennis Johanson wrote: > > Thank you for your reply, Howard. Lens shade - that was exactly the sort of > idea that I was looking for. Since English, not even American English, isn't > my mother tongue (but it was my father's BTW) I just want to check with you > that foamcore is what I think, namely plastic foam in the middle covered by > thin cardboard on each side. If so, will you get "sharp" pictures in spite of > the thickness of the foam, which I estimate to be about 0,5 cm or 1/4" - 1/8"? > Dennis > > ----- Original Message ----- > From: Howard Wells <sandw...@earthlink.net> > To: <pinhole-discussion@p at ???????> > Sent: Saturday, February 02, 2002 3:38 PM > Subject: Re: [pinhole-discussion] Pinholing with SLR and extension tubes > > > Works fine for me. I use black foamcore cut into circles for the pinhole > > "holder." Mostly I use this technique with zoneplates and put an > > additional tube on the front as a lens shade. this also allows for easy > > comparison testing of different size pinholes. I use old Leica > > threadmount tubes on my old leica, they are inexpensive and seem to come > > in a good range of sizes. One could also use the black plastic plumbing > > pipe or cardboard mailing tubes. > > Howard Wells > > > > > Dennis Johanson wrote: > > > > > > This week I got an old SLR back from service, and I have a set of > > > extension tubes for it. An idea came to my mind, namely to use one or > > > more of the extension tubes with a pinholed lens cap or aluminum foil > > > at front. I could even get a second extension tube set and use these > > > ones separately as front tubes with permanent holes of different > > > diameters that would fit different combinations of the other tube > > > set. > > > > > > Probably someone has tried this already, and if so I would be very > > > interested in learning the outcome of it as well as in getting some > > > suggestions for improving my idea. > > > > > > The best way is to try it out myself, but hey, I am the guy presently > > > converting a (too small) guest toilet into a darkroom, and that keeps > > > me busy enough for the moment. > > > > > > Dennis > > > > _______________________________________________ > > Post to the list as PLAIN TEXT only - no HTML > > Pinhole-Discussion mailing list > > Pinhole-Discussion@p at ??????? > > unsubscribe or change your account at > > http://www.???????/discussion/ > > _______________________________________________ > Post to the list as PLAIN TEXT only - no HTML > Pinhole-Discussion mailing list > Pinhole-Discussion@p at ??????? > unsubscribe or change your account at > http://www.???????/discussion/
