Join “Worldwide Pinhole Photography Day 2016” (April 24th) And Show Us Your Results
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In the past I have alluded to film with significant reciprocity failure requiring the addition of a folding lounge chair to the photo equipment.
I'm not sure if it is borne out in real world use, but the reciprocity compensated exposure charts from Pinhole Designer can suddenly take off into the multi-hour range.
Dave, you have great point, a camp chair, nice thermos of an adult beverage, latest issue of Lens Work rag. i have looked at a couple of subjects i was particularly interested in for pinhole and the lighting, but didn't have the patience or the camp chair. I did take a photo on MLK day, in the coldest winter in NJ since Grover Cleveland was president. It was about a 15 minutes exposure and i was a snowman when it was over. Was windy too, the wind chill cut through layers and layers of Lands End clothing. One good use for the pinhole is making very long focal length photographs without finding or paying for the equivalent glass. But, that takes the f/stop to the ridiculous as you point out. I am doing one on Friday at lunchtime, if weather cooperates. Subject in mostly in shade. Film is asa100. My approach will be to work with two tripods, because i also aim to take a different photo at the same location with traditional lens. I figure the amount of exposure for the pinhole will be about the amount of time it takes me to compose a large format photograph. But seriously, i am taking a 4x5 monorail on the heavy tripod at f322 in rather dim light. It is about a one minute exposure calculation and i estimate something on the order of 5-8 minutes with reciprocity on FP-4. I will least-square curve fit the FP-4 datasheet to extrapolate out to a minute. My traditional lens may be on the field view 4x5 on a bit lighter tripod. I may though go to the 8x10 so i can contact print. The traditional lens photo will be my entry to the current MSA. The pinhole if it comes out i will try to put up onto APUG. My choice of pinhole for this subject is due to the need for focus from just in front of the camera all the way to the far field. If it comes out i may duplicate the effort on WPPD or find another suitable subject. Friday is a trial run, i have not done a pinhole photograph in years. Homemade pinhole in alu foil fitted to a mdf board cut to fit my cambo. Only reason i did this is because when i bought the cambo i had no lens and no money and no idea how to shop for a lens. Saved shekels for about 6 mos and then found a photographer in Queens selling a Schneider 210mm APO-Symmar. Had fun with the pinhole and polaroid in the interim.
Paper negatives beat FP-100C ( which is nominally ISO 100 ) easily if the reciprocity-corrected exposure will be more than about 2 minutes.
Here's a table (there was a url link here which no longer exists):
In my pinhole camera, in full sun the exposure is about 7 or 8 seconds, which would correspond to "metered 2 second" in his table. My experience is that this table is optimistic.
Here's what I usually guesstimate:
Stops from full sun:
-0 7-12s
-1 20s
-2 90s
-3 5-7m
-4 25-35m
-5 1h30m - 2h ( or more )
-6 6h+ ( probably hopeless! )
and for a pre-flashed 5x7 paper negative, in one of my coffee can cams, very linear:
-0 20s
-1 45s
-2 90s
-3 3m
-4 5-6m
-5 12-15m
-6 25-30m
-7 1hr
Here's a table (there was a url link here which no longer exists):
In my pinhole camera, in full sun the exposure is about 7 or 8 seconds, which would correspond to "metered 2 second" in his table. My experience is that this table is optimistic.
Here's what I usually guesstimate:
Stops from full sun:
-0 7-12s
-1 20s
-2 90s
-3 5-7m
-4 25-35m
-5 1h30m - 2h ( or more )
-6 6h+ ( probably hopeless! )
and for a pre-flashed 5x7 paper negative, in one of my coffee can cams, very linear:
-0 20s
-1 45s
-2 90s
-3 3m
-4 5-6m
-5 12-15m
-6 25-30m
-7 1hr
and one minute for developing versus 20 minutes! I am liking this alternative!
Very nice. How long was the exposure each day?
Also interesting is that the tree was visible only when it had large enough leaves on it.
In the window of a cabin, looking out at the lake, exposing night and day. And you're right: that tree lost its leaves all winter then grew them back in the Spring! The streaks are the sun rising and crossing the sky each day. More here.
My Zero Image 6x9 multiformat pinhole (which has produced images every WPPD I can remember...) is f245. One or two go to f290. Mr Au has said that the f/stops are approximations. But very good ones.
Regarding sharpness, there is a nonsensical trend for people to take a normal pinhole image and sharpen it until it cuts off their eyelashes! This of course is not in the spirit of true pinhole imaging where a lack of focus but excellent definition are the hallmarks. Only apply post-scan USM to replace that lost at the scan step. That people should be applying 150% USM is mad (still more those who want a pinhole camera that makes super-sharp images...).
Very nice photos - thank you.
Hmmm, I think I'll be on 14 hour flight from LA to Sydney on the 24th. I have an OM body cap pinhole so I may have to improvise an "8 mile high" photo!
OP
OP
Book a window seat and make some shots varying from 30 seconds up to 10 minutes exposures above the clouds on colour film. That would be something.
My longest exposure ever was about 12 hours [Type 55, very dark interior]....
Uhh..... wouldn't he have to duct-tape the camera to the window?
"No, miss pretty stewardess, this is not a bomb to blow out the window - it is a camera. Yes, really it is."
woooow.... im loving this so much
I look forward to the day ... I participate for 5 years and it's all very nice !! ;/)
This will be my sixth or seventh year of participation. As usual, Australia will populate the pinhole pages with pretty pictures come the days and weeks after 24th.
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Here is some inspiration: http://fslashd.com/2016/04/studies-in-motion-jean-christophe-denis/
Day after tomorrow! 
I know which cameras I'm going to use, but still have not decided where to go. I usually go out in the morning, come home around noon to swap out all the paper negatives, then go out again in the late afternoon. I keep thinking "oak trees ", but we'll see. Tomorrow I'll pre-flash paper in various sizes from 5x7 to 11x14.
I know which cameras I'm going to use, but still have not decided where to go. I usually go out in the morning, come home around noon to swap out all the paper negatives, then go out again in the late afternoon. I keep thinking "oak trees ", but we'll see. Tomorrow I'll pre-flash paper in various sizes from 5x7 to 11x14.
... and check your work!
I pulled my 8x10 camera out of the cabinet this morning, getting things lined up for Sunday. The back was wide open, as there was no film holder in place. For no particular reason I pointed it up toward an overhead fluorescent while looking in the back and opened the shutter. Saw a little line near the edge of the round cutout where the pinhole plate is mounted; wasn't sure whether it was a reflection of something or a crack.
Flipped it over in the darkroom and put my little LED keychain flashlight under it -- ooops! So I removed the clamping block and took a further look.
Bummer! I found it to be a very good pinhole, so I cut a thin black washer out of some film backing paper and clamped it over the pinhole plate -- should work OK for Sunday.
That was only 1 mil brass shim, and presumably dimple-and-sand removed some thickness, so it's mighty thin foil. I'm thinking the model railroad blackening stuff appears to have triggered some corrosive action too. I can't believe it was cracked last year or it would have shown up in the results. Best guess it was seasonal expansion/contraction of the oak surfaces clamping the brass.
I've loaded four film holders with Fuji HR-T X-ray film and think I'm ready, more or less. (I have an art show reception and removal to deal with Sunday afternoon, so I need all my duckies in a row ahead of time.) The weather guessers are calling for 69ºF and sunny on Sunday, can't ask more than that!
I pulled my 8x10 camera out of the cabinet this morning, getting things lined up for Sunday. The back was wide open, as there was no film holder in place. For no particular reason I pointed it up toward an overhead fluorescent while looking in the back and opened the shutter. Saw a little line near the edge of the round cutout where the pinhole plate is mounted; wasn't sure whether it was a reflection of something or a crack.
Flipped it over in the darkroom and put my little LED keychain flashlight under it -- ooops! So I removed the clamping block and took a further look.
Bummer! I found it to be a very good pinhole, so I cut a thin black washer out of some film backing paper and clamped it over the pinhole plate -- should work OK for Sunday.
That was only 1 mil brass shim, and presumably dimple-and-sand removed some thickness, so it's mighty thin foil. I'm thinking the model railroad blackening stuff appears to have triggered some corrosive action too. I can't believe it was cracked last year or it would have shown up in the results. Best guess it was seasonal expansion/contraction of the oak surfaces clamping the brass.
I've loaded four film holders with Fuji HR-T X-ray film and think I'm ready, more or less. (I have an art show reception and removal to deal with Sunday afternoon, so I need all my duckies in a row ahead of time.) The weather guessers are calling for 69ºF and sunny on Sunday, can't ask more than that!
OP
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I'm loading my beautiful RealitySoSubtle 6x17 for the first time now - to be used tomorrow on WPPD-2016!!
"... Louis, I think this is the beginning of a beautiful friendship ..."
(See for camera: https://aupremierplan.fr/custom-cameras/6x17-panoramic-pinhole/ )
"... Louis, I think this is the beginning of a beautiful friendship ..."
(See for camera: https://aupremierplan.fr/custom-cameras/6x17-panoramic-pinhole/ )
I plan on using mine tomorrow as well - hopefully I've loaded it properly! (The first couple of times were okay, now I always seem to do something wrong).
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