What is the benefit to modify webcam to do long exposure. Shouldnt stacking 100x5s do exactly what a 500s long exposure and better?
Found the following link to support my thoughts.
http://www.skyinsight.net/wiki/index.php/Image_Stacking
Any comments or advise?
webcam - modified vs unmodified stacked
The short answer is that 100x5 does not give you the signal to noise ratio of a 500s exposure because readout noise will be stacked also. Meaning 100x5 gives the readout out noise 100 times more than the 500s exposure.
But you may say the 500s exposure has too many hot pixels, well, that can be resolved by a matching dark frame.
webcam sensors are very noisy compared to StarShoot, DSI or Atik, so I will say that if you buy starshoot, DSI or Atik, you will surely get much better pictures than a modified webcam and with less effort also.
But you may say the 500s exposure has too many hot pixels, well, that can be resolved by a matching dark frame.
webcam sensors are very noisy compared to StarShoot, DSI or Atik, so I will say that if you buy starshoot, DSI or Atik, you will surely get much better pictures than a modified webcam and with less effort also.
Photo Album:
http://www.flickr.com/photos/14113965@N03/
http://www.flickr.com/photos/14113965@N03/