As exposure lengthens the sensor heats up. As the sensor heats up noise
increases.
Barry Rice wrote:
Hey Folks,
Thanks for the speedy comments re: sensitivity. So my follow-up question
(and then I'll try to get some work done today!)....is there any reciprocity
failure issues with digital detectors? I'd think the detection was fairly
linear with long integrations (exposures), but I'm guessing that once those
little ccd buckets start to fill up with electrons, they might start losing
linearity.
Can you tell I was trained as an astronomer? Geek alert!
Barry A. Rice, Ph.D.
Invasive Species Specialist
Invasive Species Initiative
The Nature Conservancy
V: 530-754-8891
http://tncweeds.ucdavis.edu
--
When you're worried or in doubt,
Run in circles, (scream and shout).
