Archived posting to the Leica Users Group, 2003/08/21

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: Re: [Leica] Fw: LC5 noise at 400 iso
From: "Sonny Carter" <sonc@sonc.com>
Date: Thu, 21 Aug 2003 06:44:24 -0700
References: <005601c36754$76439440$ea40b8c7@nsula.edu> <3F445307.29318DFE@hale-pohaku.com>

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

In reply to: Message from "Sonny Carter" <sonc@sonc.com> ([Leica] Fw: LC5 noise at 400 iso)
Message from Dennis Painter <dennis@hale-pohaku.com> (Re: [Leica] Fw: LC5 noise at 400 iso)