Camera ISO problem

嘉嘉

I have noticed recently my 400D changes ISO setting by itself sometimes

There were a couple of times I realized I was shooting at iso800 or 1600 at strong day light............so I was pretty sure I did not switch it myself..........

anyone have a clue what is wrong with my camera @_@?

lo_pak

回復 1# 嘉嘉

Are you using Auto ISO? What camera mode you have set to?

嘉嘉

nope......I don't even have Auto ISO on my 400D

I was shooting at M or Av
and it has never happened before until recently

lo_pak

回復 3# 嘉嘉

Normally that won't happen... Can you provide more specific info?

satil

try set iso to 100.
then hold down the ISO
(top of the circle button on back)
see if it will switch ISO until you release. (end at 1600)

if so, i think u accident press it (not turn it)
when you hold camera, use viewfinder, is your thumb press the key??

嘉嘉

Tried, nope
it doesn't do anything when hold down the ISO button

I use my finger to release shutter
only use thumb when pressing other buttons for settings, but that's when my face is away from the camera
and I think it happened once when I was shooting the fireworks while using a cable release
I had one picture at iso800 for no reason.....