----- Original Message ----- From: "Thomas Hennemann" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Wednesday, May 28, 2003 10:03 PM Subject: ISO speed setting on digital EOS bodies
> Hi, > > after having bought a digital P&S camera (Powershot S 50) I wonder if > there is an ISO speed setting AUTO on the digital EOS bodies. > Assuming there is this setting: How is it expected to work and how can > you actually verify that it does what it is supposed to do? > > Just for your info: I am pretty sure that this setting on the S 50 does > nothing at all (and googling the usent groups I am almost certain that > it never worked for at least the S40 and the S45) but I would like to > have some arguments when talking to Canon. Of course Canon claims it > does work. > > Thanks very much. > > Regards Thomas Hi Thomas The 10D features auto ISO when in the Basic Zone Modes. For example, in Portrait mode the camera selects ISO100, in Sport mode ISO400. In other modes the camera selects between ISO100 and ISO400. Canon does not document, in the instructions, how this is implemented. My guess is that the camera tries to maintain a "hand-holdable" shutter speed, changing the ISO when apertures are wide open. Interestingly(?) in this mode the camera can select ISO increments of 1/3 stop. Perhaps a firmware upgrade would allow user selectable ISO in 1/3 stops - more features in firmware, not Canon policy! When flash is used the camera selects either ISO100 or ISO400, depending on the Zone selected and whether an external Speedlite or the built-in flash is used. HTH CraigZ * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
