Archived posting to the Leica Users Group, 2013/10/03
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]Hi Frank, the "pure black subtraction" is what I was referring to. I am planning to do photos that need 4+ mins exposure. May be even 1/2 hour or longer. I know the M9 BATTERY may not last that long, but certainly it will last 2x as long if I can remove the "pure black subtracting" step. The alternative is my "P&S" 4x5 with rigid lens cones for stability, but I am looking at options. Thanks. On Wed, Oct 2, 2013 at 11:53 PM, Frank Filippone <red735i at verizon.net>wrote: > With the M9, there is a time after exposure when the camera samples pure > black and subtracts that from the actual exposure. This happens with times > in the 1 second and longer range..... noise reduction..... AFAIK, there is > no way to turn it off. > > Why do you ask? Special application? > > I do not know about dead pixels and how or if they are handled. > > Frank Filippone > Red735i at verizon.net > > > -----Original Message----- > From: lug-bounces+red735i=verizon.net at leica-users.org > [mailto:lug-bounces+red735i=verizon.net at leica-users.org] On Behalf Of > Richard Man > Sent: Wednesday, October 02, 2013 6:21 PM > To: Leica Users Group > Subject: [Leica] Long exposure on digital > > As far as I know, there is no way to turn off long exposure "second > exposure" on the M9 (i.e. where the camera does a same exposure to remove > noise and map out dead pixels). Am I correct in that? > > Are there any digital cameras that do not have that feature? > > > > _______________________________________________ > Leica Users Group. > See http://leica-users.org/mailman/listinfo/lug for more information > -- // richard <http://www.richardmanphoto.com> // http://facebook.com/richardmanphoto