General > General Technical Chat
Longest known exposure photograph ever captured using a beer can
helius:
No fooling, the focal plane cannot be in the lens!
Mr. Scram:
--- Quote from: mag_therm on December 15, 2020, 05:12:41 pm ---No Pinholes here, but i have a collection of vintage cameras and a setup to process and scan C41 and b/w.
This time exposure-went-wrong is from the cutting room floor.
It looks like the T-Model is arriving from Star Trek. I can't understand how the wheel spokes got bent like that.
Taken with an RB67 , a very good slr medium format camera which uses in-lens focal plane shutters.
--- End quote ---
I suspect the bent spokes are the result of a shutter sweeping across the film creating an effect somewhat similar to rolling shutter, albeit at a very different frequency.
mag_therm:
Excuse me on the shutter error. I will edit.
Yes, the Mamiya RB67 used in-lens leaf shutters as noted. I have 3 RB67 lenses here
I also have two Graflex here, and one is a Speed Graphic with the focal plane shutter.
I have various lenses for the Graphlex, including Pentax 6x7 lenses with no shutters, which use the focal plane shutter.
i have used both the Graflex and Mamiya at Greenfield Village where the photo was taken.
Edit photos of the old cameras added, incuding the home-brew metal camera I built in 2012
SilverSolder:
--- Quote from: mag_therm on December 15, 2020, 05:12:41 pm ---[...] I can't understand how the wheel spokes got bent like that. [...]
--- End quote ---
The wheels rotated a little while the shutter was open, making the spokes bent on the film.
StillTrying:
"The wheels rotated a little while the shutter was open, making the spokes bent on the film."
Yes if it was a rolling down shutter the left and right spokes would be quite different from each other.
I like the last pic of a coin, I'll try it one day at > 1/200 sec.
https://www.diyphotography.net/this-video-helps-you-understand-the-rolling-shutter-effect
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