On switch on 40D

Why are there two "ON" positions on the 40-50D? and what do each do, besides of course turn it on.

first click is "on"
second click allows you to use the thumb wheel to control settings

Mattr!x wrote in post #6538424
first click is "on"
second click allows you to use the thumb wheel to control settings

Bingo.

Setting it to "ON" turns on the camera. Notice how the second setting has the line going up to the thumbwheel? That's because the second setting is just like the first except that it also activates that thumbwheel.

I have a question about that second setting

Why exactly? Why disable the thumbwheel? its so useful and handy I cant see why you'd just -disable- it like that

I always use the thumb wheel but sometimes I tend not to because I have a tendency to tap it and never notice the exposure settings has been changed and I get a bad exposure on the shoot

KenjiS wrote in post #6538762
Why exactly? Why disable the thumbwheel? its so useful and handy I cant see why you'd just -disable- it like that

So when you hand your camera to someone else (friend/waiter/passerb​y) to take your photo, they won't inadvertently put their big thumb over the wheel while focusing and throw off your exposure compensation?

(just a guess.)



There are few things as annoying as taking a bunch of photos only to realize later, someone had dialed up your exposure compensation by 2 stops.

jwcdds wrote in post #6538798
So when you hand your camera to someone else (friend/waiter/passerb​y) to take your photo, they won't inadvertently put their big thumb over the wheel while focusing and throw off your exposure compensation?

(just a guess.)



There are few things as annoying as taking a bunch of photos only to realize later, someone had dialed up your exposure compensation by 2 stops.

I fixed that by telling my friend if he dost touch the thumbwheel then angryspikes will shoot out of it and impale his thumb because its keyed to my thumbprint

Actually in all seriousness most of my friends are at least basic photographers [They know some basics on camera operation] So I guess I never had that happen...