Sumpter, Oregon (pinhole)

Sumpter, Oregon (pinhole)

scan of 5x7 neg
Location
Sumpter, Oregon (an old mining town -- this is an old boat, gold dredge in background)
Equipment Used
homemade cigar box pinhole camera
Exposure
4 min
i like this one the most of the set you just uploaded today. how far away was the camera from the boat? also, i'm curious how big the hole is and how thin the pinhole material is. you've gotten such sharp results i must find out how to get similar to this. i'm using 120 film backing for my pinhole material. basting pin stuck in halfway is just a hair under .5 mm. and i have mostly exposure times in the 1 second to 15 second range but you've got 4 minutes listed which tells me distance of pinhole to film plane is deeper on your camera than mine and the hole is smaller and the sharpness has to be a thinner pinhole material than the 120 film backing. anyway, these are some mighty good pictures you uploaded. good job! :smile:
 
hi perry--
thanks for your remarks on the images .... to answer your questions-- the camera is maybe six inches or so away from the metal flange w/spikes at the end of the boat (and tilted down a bit, aimed just above that flange) .... the pinhole itself is "manufactured" by an outfit that makes cardboard tube pinholes (like toilet paper tubes with 3" diameter)--i cut it off that thing and put onto the lid of a 3" deep cigar box for the camera i am now using.... consequently, i am not sure of the exact material they used (looks like a thin brass sheet) or the exact measurement of the hole,... but i figure it's about the size you mention (a bit under .5mm), because it was advertised as an f/250 for that 3" deep tube camera....... that was the same f/stop i came up with for my first pinhole (a 3" deep 250-sheet arista paper box), and i made that hole a bit under .5mm with a pin pricked thru a piece of aluminum cut from a disposalbe turkey roasting pan ..... i am using an old 5x7 back on these cameras so i can use my sheet film holders (very convenient), and that gives me a pretty good wide angle (about 80mm) focal length .... the exposures on this thing are usually about 35 seconds to 90 seconds on a bright day (this is after reciprocity with trix-- without reciprocity they'd be 8 to 16 seconds -- this one was 30 seconds because the sun had gone down, and my reciprocity compensation pushed it to 4 minutes) ..... this hole is sharper than my previous homemade pinhole, which you can see by looking at pics i uploaded to the standard gallery a couple of months ago ..... hope i didn't ramble on too much

rich
 
no you didn't ramble rich, that was exactly the kind of information i was looking for. well personally i think you hit the jackpot on this one. i can't get them (on average) this sharp, but i think lighting has a lot to do with it. where i am (central coast california) sunlight here is usually turn on max throughout the day and so it's rare that my exposures run that long. perhaps on a darker foggy day i might. this is really good stuff. i'm very much attracted to pinhole photography, enjoying mixing it with bromoil for an added artistic effect that usually works out quite well. this scene of yours my favorite of the recent uploads because it would work out very nicely as a bromoil print, in my opinion. cheers!
 

Media information

Category
Standard Gallery
Added by
rbergeman
Date added
View count
274
Comment count
4
Rating
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Image metadata

Filename
sumpter.boatatdredge.jpg
File size
84.5 KB
Dimensions
850px x 600px

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