Archived posting to the Leica Users Group, 2003/08/20
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Could there be heat from the LCD display that warms the CCD sensor? Temperature is a factor in dark current but for some reason the camera manufactures don't seem to think it's a big effect. Probably because the amount of photons is a lot, but when trying for ever higher ASA ratings it seems that dark current should become a significant factor. Sonny Carter wrote: > Peter Klein and I have been chatting offlist about an on topic issue, > (horrors!) noise in the Lika Leica and Digilux at 400 iso. > > Peter said: There was one other angle to the high ISO noise that I didn't > post on the LUG because I only heard about it from one person. He said > that the LCD display created bad noise in the image, and he got much better > pictures with the LCD off. IF true, that could be a result of bad > shielding design, or a QC problem with his particular camera. > > (Back to Sonny) So I set up my camera and took a couple shots of the same > location at ISO 400 with the LCD and without. The file is quite a bit > better as regards noise with the LCD turned off. I can see that some > software cleaning might make it better still. > > Here's a section of the image, but it still is quite sizable, > http://www.sonc.com/lcd_check.jpg > > so if you dialup use this link > http://www.sonc.com/lcd_check_sm.jpg > Regards, > > SonC > http://www.sonc.com > - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html