Archived posting to the Leica Users Group, 2003/08/21
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]If it were heat it would be rapid cool down; the two shots were moments apart, as quickly as I could turn off the LCS and shoot again. It might be interesting to try it again with a good deal of time between shots, SonC - ----- Original Message ----- From: "Dennis Painter" <dennis@hale-pohaku.com> To: <leica-users@mejac.palo-alto.ca.us> Sent: Wednesday, August 20, 2003 10:05 PM Subject: Re: [Leica] Fw: LC5 noise at 400 iso > 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 - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html