pinkarmy
Well-known
so handsome!
another DIY pinhole
- Thread starter jbielikowski
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lorenzo1910
Established
LOL...
Too much contrast in the paper negative guys...may anybody suggest how pre-flash the paper? (they say the contrast will be lower...)
Please help...
tokengirl
Established
Love the viewfinder!
I built a pinhole camera with a Horseman 6X7 roll film back I bought on eBay. I also bought a very nice shutter with a socket for a cable release from PinholeBilly on eBay. The camera is 48mm focal length, pinhole is .259. I somehow convinced my dog to stay mostly still for a whole minute:
On the next shot, she moved halfway through, which ended up making a much more interesting photo:
rbiemer
Unabashed Amateur
At least here in the US, a good alternative to brass shim stock--which can sometimes be hard to find locally--or soda/beer cans--which are very hard and tough on your drills/needles--is the "disposable" pie pans or trays that muffins sometimes come in. These are just about the same thickness as the brass and are not nearly as hard as the soda cans. And almost zero cost. And fairly large so you can get quite a few pinholes from each.
Nice images, all!
Lorenzo, you may find that while the negs seem too contrasty, if you are making contact prints from them instead of scanning, that "extra" contrast will make an OK print.
Rob
Nice images, all!
Lorenzo, you may find that while the negs seem too contrasty, if you are making contact prints from them instead of scanning, that "extra" contrast will make an OK print.
Rob
Frankie
Speaking Frankly
I have no interest in pinhole cameras...but for the seriously interested, check out:
http://www.edmundoptics.com/onlinecatalog/displayproduct.cfm?productid=1794
Pinhole size starting at 1u is available.
http://www.edmundoptics.com/onlinecatalog/displayproduct.cfm?productid=1794
Pinhole size starting at 1u is available.
lorenzo1910
Established
Thanks folks...
My pinhole looks working fine (I see many details in the negatives) and it's made with the usual soda can/needle... but I get way too long exposures: 7 to 8 min. in shade (open air)
I've tried shorter exposures but the negatives looks badly underexposed...
That advice how to pre-flash the paper is still welcomed...(...bulb? Power? How long? ...Enlarger? Distance? f/stop?...)
My pinhole looks working fine (I see many details in the negatives) and it's made with the usual soda can/needle... but I get way too long exposures: 7 to 8 min. in shade (open air)
I've tried shorter exposures but the negatives looks badly underexposed...
That advice how to pre-flash the paper is still welcomed...(...bulb? Power? How long? ...Enlarger? Distance? f/stop?...)
lorenzo1910
Established
@ tokengirl:
Many thanks,that viewfinder comes from a dismantled Agfa ...
Jasmine is lovely and you get a beautiful B&W with a really good greyscale...I think using film instead of paper can give better images...
Many thanks,that viewfinder comes from a dismantled Agfa ...
Jasmine is lovely and you get a beautiful B&W with a really good greyscale...I think using film instead of paper can give better images...
Papercut
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Lorenzo,
I use film for my pinhole photography, so I can't answer your question about pre-flashing directly. But, I know there are many threads with advice on that topic in the forums on f295.org, which is dedicated almost exclusively to pinhole/zone plate. Lots of pinhole experts there: http://www.f295.org/Pinholeforum/forum/Blah.pl
I use film for my pinhole photography, so I can't answer your question about pre-flashing directly. But, I know there are many threads with advice on that topic in the forums on f295.org, which is dedicated almost exclusively to pinhole/zone plate. Lots of pinhole experts there: http://www.f295.org/Pinholeforum/forum/Blah.pl
lorenzo1910
Established
Many thanks Kevin!
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BTW here are three scans of the paper negative and positive of a picture taken with my Pinhole Camera
Shade,7 minutes exposure:
Negative
Positive
Positive Level Adj.
Sharpness will be better since I've just realized that the hole is a little more than 0.5 mm and I've managed to built a smaller one (0.35 that would work fine with the box focal lenght)
More update,if you care... 😱
- - - - - - - - - - - - - - - - -
BTW here are three scans of the paper negative and positive of a picture taken with my Pinhole Camera
Shade,7 minutes exposure:
Negative
Positive
Positive Level Adj.
Sharpness will be better since I've just realized that the hole is a little more than 0.5 mm and I've managed to built a smaller one (0.35 that would work fine with the box focal lenght)
More update,if you care... 😱
Papercut
Well-known
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Lorenzo,
Looking good already, though I agree that it's a bit high contrast (lacks some shadow detail) -- a bit of pre-flash will help lighten up the shadows and reduce contrast. Once you get that dialed in, you'll be set to go. IIRC, JoeV on f295.org does a lot of pre-flashing paper and he gets beautiful tonality -- as do others (just can't remember names as I haven't been there, or shot pinhole, for quite some months now).
Looking good already, though I agree that it's a bit high contrast (lacks some shadow detail) -- a bit of pre-flash will help lighten up the shadows and reduce contrast. Once you get that dialed in, you'll be set to go. IIRC, JoeV on f295.org does a lot of pre-flashing paper and he gets beautiful tonality -- as do others (just can't remember names as I haven't been there, or shot pinhole, for quite some months now).
Elektrojänis
Established
Hi,
I made some more experiments with 35mm film and a pinhole. This time I built the whole camera myself. Here is some pics and a picture of the camera too: http://www.flickr.com/photos/40747751@N08/sets/72157626332163483/
Focal length is about 21mm and hole size about 0,2mm. I used a bit wider film frames... 24mm x 72mm.
I made some more experiments with 35mm film and a pinhole. This time I built the whole camera myself. Here is some pics and a picture of the camera too: http://www.flickr.com/photos/40747751@N08/sets/72157626332163483/
Focal length is about 21mm and hole size about 0,2mm. I used a bit wider film frames... 24mm x 72mm.
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