Re: [pinhole-discussion] rational
Don, Thanks for the confirmation of great digital pinhole pics. Having not tried it yet (still saving for my upper end digital), I'm glad to hear that a pinhole will work on the 10D. I wasn't sure what to expect. Later, Trent "D. Hill" wrote: > I use both zoneplate and pinhole bodycaps with my 10d > - fab images.
Re: [pinhole-discussion] PS4 IMPORTANT NOTICE for ORGANIZATION - Please read carefully
Thanks for the heads up. I love the idea! I'll check it out. Later, Trent George L Smyth wrote: > Just a quick note to let people know that The Internet Photographic Handmade > Postcard Trading List is still alive and active... > > If you feel that this would be of interest to you
Re: [pinhole-discussion] smaller needle diameter
Speaking of needles, has anyone tried acupuncture needles for making pinholes? I've seen at least one article (can't remember where) that made mention of their use because of their *very* small diameter, built in handle, and apparently a "chisel point" tip on them. Later, Trent > Maybe I needed a finer needle and a > thinner material to blast...
Re: [pinhole-discussion] Zapping holes with electricity
Thanks for the warning. Since you obviously know at least a bit about machining (hence, your mention of EDM), have you made any pinhole plates from tool steel wrap (stainless steel) used for heat treating metals? It works reasonably well, but I'll stick to using brass shim stock. Later, Trent > ... but the hole were very crappy, with loads of garbage around the edges.
Re: [pinhole-discussion] definition of pinhole
Becky, I call it "silly" or "misinformed", but perhaps it could be called an "external aperture", or a "sunshade". It should greatly reduce lens flare. I also like that you called it a vignette. Whatever anyone calls that setup, I wouldn't consider it a pinhole camera. It just doesn't make sense. Does it? It's like you have two apertures. Hmmm. Geez, now I'm thinking of trying it just to see what happens. Later, Trent (who is far too curious) Becky Ramotowski wrote: > But some are placing the pinhole over the lens. What do you call this, > since to me it is not a true pinhole?
Re: [pinhole-discussion] polaroid pinhole question
Guillermo, Your note led to a couple of real revelations for me! Now that I have a much better grasp on things, I'll go back and re-read what I *thought* I understood before. I'm also now quite proud to consider myself an amateur. Thanks for the lesson(s)! Later, Trent "G.Penate" wrote: > amateur is the french word for LOVER, of pinhole in this case. > > The answer is not color shift. Why the film's colors > shift is because Reciprocity Failure ...
Re: [pinhole-discussion] polaroid pinhole question
Did that just label me as amateur, or what?! Sorry folks. I should have searched before posting. We've just always called it color shift. Later, Trent Trent Dowler wrote: > That's a new one on me, and I have no idea what "reciprocity failure" is.
Re: [pinhole-discussion] polaroid pinhole question
Thanks, but I'm still missing it. That's a new one on me, and I have no idea what "reciprocity failure" is. Although, the name itself conjures up many ideas. Any points in the right direction where I can increase my knowledge about it? Later, Trent, who's off to search my books and the web. "G.Penate" wrote: > > > Perhaps I've missed it, but why does the Polaroid film packs produce strong > > magenta tones? Could it be improper developing time? > > Reciprocity failure.
Re: [pinhole-discussion] Pinhole ideas
Hello All, I happened upon some interesting pinholing tricks and thought it might be of interest to the rest of you. I haven't tried the arc produced pinholes yet, but I'm thinking that the possibility of using discarded guitar strings (small diameter, or "little e" string) might work really well for this. Anyone tried either of these ideas yet? Later, Trent From: Mike Sinclair: I just now repeated the pinhole production procedure to be sure of my facts. I used a 12v power supply (batteries will do) to charge a 330 uf capacitor through a 1K ohm resistor (to limit the current). One lead of the capacitor was connected through a clip lead to a strip of ordinary aluminum foil (mine is .018 mm thick) and the other to a needle, also through a clip lead. A small gauge wire cut on a bias also works as a needle. When the resistor charged up the capacitor after a couple of seconds, I'd slowly bring the needle into contact with the aluminum foil, producing a small spark and making a tiny hole - much smaller and cleaner than you can drill! I did this repeatedly, spacing the holes about every inch. I then looked at the holes under a medium microscope and chose the best one. I also found that putting a drop of light oil on the end of the needle and letting the metal vaporize in oil produced cleaner holes. The holes were about 0.08mm in diameter which will produce a surprisingly sharp image (for a pinhole camera). You can vary the diameter by varying the voltage. For multiple exposure capability, I taped a length of string to the bottoms of each of the unexposed 4"x5" films (I could get up to 6). Each string had one, two, three...knots tied in it to indicate what exposure I was on. As I'd take an exposure (several minutes in daylight with Tri-X film) I'd pull the next string in the exposure series which would pull that sheet into the bottom cylinder, leaving the next unexposed sheet ready for exposure in the top cylinder. Hope this helps. -Mike- From: Clint O'Connor Break out the champagne, Bob! That suggestion from Mike works beautifully. Most welders are very low voltage. So I grabbed a piece of aluminum foil and headed out to the garage for my 12V lead acid battery, a dental pick, and a pair of alligator clip test leads. A lead acid battery can deliver tens to hundreds of amps, depending on the size. A capacitor isn't necessary unless you have a smallish battery, in which case, the capacitor helps by delivering more instantaneous current than the battery may be able to deliver. 1. Connect one terminal to the foil 2. Smooth it out on a flat non-conductive surface (wooden table) 3. Connect the other terminal to the dental pick (or a needle) 4. Lower the pick until a spark jumps to the foil, making a momentary snapping, frying sound Perfect pinhole! It was a rather blunt dental pick, so the hole measures out on my dial calipers as 0.0130". I believe if you have a consistent contact gap, you can make perfectly repetitive pinholes on aluminum foil. Should be a pretty simple rig. The size can be varied by using bigger or smaller needles, the surface area on the tip should determine the size of the pinhole. And 12V makes a very safe source, the worst that can happen is probably pricking yourself on the needle. I envision the ideal rig as something like a giant telegraph key with adjustable gap distance. The foil goes between the bottom contact and the descending key, which has a needle. Of course, even though the amount of metal vaporized is miniscule, you should wear safety glasses and don't put your face right up to it. Don't use anything heavier than aluminum foil or ultra-thin sheets though. It'll draw a lot more current from the battery and might vaporize something else besides the foil - like the pick or the needle or even the wires to the battery. You can post this if you want. Be sure Mike gets the credit for the idea. Clint
Re: [pinhole-discussion] polaroid pinhole question
Ellis, You can probably find old Polaroid cameras locally at garage sales, flea markets, or thrift stores reasonably. I've found questionable (might work, might not) Polaroids for about $2-$5 that lend themselves to all sorts of tinkering. Perhaps I've missed it, but why does the Polaroid film packs produce strong magenta tones? Could it be improper developing time? Just thinking out loud. Later, Trent ellis CORY wrote: > I use the Polaroid SX70/600 type camera and as I did not want to spoil it, I > made a wooden pinhole camera to take the film pack. > The results have a strong magenta cast. I tried an 80B filter and > overexposure, this has improved it a lot and more experiments are needed.
Re: [pinhole-discussion] Re: Pinhole-Discussion digest, Vol 1 #887 - 15 msgs
Gary, Why do you have to sand off the coating? It's probably obvious to everyone else, but I've never recycled soda-pop cans into pinhole plates. I've always been blessed with plenty of brass shim stock laying around. Thanks in advance. Later, Trent Gary Nored wrote: > You'll want to > sand off the polymer coating before drilling
Re: [pinhole-discussion] 110 film sources?
Hello, Thanks all for the information on film availability. My local sources turned out to be far more limited than I first thought. I need to get to the city more often, huh?! A call to my local Wal-Mart photo lab left some young "technician" baffled. "110 film? Never heard of it. We don't sell the big stuff?" I'm guessing that he was trying to do a 35mm to 110 in a physical size comparison or something. I'll call back tomorrow and talk with someone that can be of help. If no local sources are available, I'll certainly try those that everyone has listed. Thanks! Later, Trent, in small town America Philip willarney wrote: > Hmm... I've made a number of pinhole cameras from the > larger 126 instamatic film -- still available at > > http://www.frugalphotographer.com/index.htm > > But there are plans for a 110 film camera at > > http://pinholespy.com/ > > I still see 110 film in stores from time to time -- > this place seems to have it... > > http://www.kcamera.com/main/invnew/newfc1.htm > > -- pw
[pinhole-discussion] digital pinhole camera idea (what!?)
Hello All, While walking through the local outlets, I've come across the one time use digital cameras that are now making their way onto the market. My first thought was, "Hmm, I wonder if I could pinhole that thing?" Knowing so little about digital cameras, I ask the list... Has anyone else thought about this? Is it possible? Should I attempt to build one of our beloved pinhole cameras using this "latest technology"? Is this blasphemous? Will I be ostracized from the pinhole crowd for toying around with it? If it's possible, it sort of looks fun. At least, it's a new twist on things. I'm looking forward to hearing from the group. Later, Trent
[pinhole-discussion] 110 film sources?
Hello All, My first pinhole camera was made by using a 110 film cartridge. To this day, I've not seen any type film lend itself to pinhole use as well as those old cartridges. Does anyone know of a good place to pick up any of these cartridges easily, at an affordable price? The local (albeit limited) sources all say that they're no longer available and must be ordered from someone specializing in such items. Later, Trent
Re: [pinhole-discussion] Pinhole camera instructions
Phillip, Great article! Thanks for sharing it, and giving me further inspiration to build a few to pass out to the neighborhood kids. I particularly like your list of exposure times. That alone can become the deciding factor in whether someone has a good experience, or becomes discouraged with the camera's results. Which camera did you craft the pinhole camera from? The cheap ones that I've seen locally, do not appear to lend themselves very easily to the modification, but I've not dissected one yet. Later, Trent Philip willarney wrote: > I wrote these up for some 35 mm pinhole cameras I gave > away recently, some for world pinhole day -- if you > can use them, feel free.
