First outdoor test with my new bulb ramping device BramPi 1-X - and an old Canon 400D/Rebel XTi. Bulb-time varies from 300 milliseconds to 10 seconds, and ISO 100 to ISO 200.
After gathering some experience with my Arduino based Bulb Ramper Brambuino 1-X (code: github.com/borisboesler/Brampuino-1-X ; test video: vimeo.com/47599954) and finding some real drawbacks like no explicit shutter control, I put my two brain cells together and came up with this new Bulb Ramper I call "BramPi 1-X".
BramPi 1-X is a Raspberry Pi based time-lapse device that uses libgphoto2 to support as much cameras as possible as long as they have a Bulb-mode. Besides standard bulb ramping, it supports automatic ISO Ramping as well (Brampuino 1-X did that already). Did you see ISO Ramping in this video? No? Perfect!
Anyway, additionally it supports HDR with up to 16 frames; HDR EV steps can be set in multiple of 0.1 EV. BramPi 1-X supports different modes of HDR: standard mode 0,-,+ and mode 0,-,-- for DRI like effects and mode 0,+,++ for whatever reason.
Additionally, it can write a time-lapse XML protocol file. I use an AppleScript to transport all exposure data as meta data to the frames in Aperture. Probably there will be some gnuplot generators.
Finally, BramPi 1-X can be used as an external intervalometer for Dynamic Perception's dolly engine MX-2.
Currently, the prototype is an ugly board with some 2.5mm jacks to control the camera's shutter, a 4x20 LCD, 6 buttons and a real time clock. YES, it has a clock!
I hope to upload some more tests soon.
Yes, there is an exposure hick-up in the video. I' ll have to check.
