Auto

I just got an XTi and have played around with most of the settings. I
have noticed that in Auto the ISO is always 400. Should it not vary
with the different scenes I have been shooting?

Thanks in advance for your help.

In article <1177892852.084714.211120@n59g2000hsh.googlegroups .com>,
asherbenruby@gmail.com wrote:

> I just got an XTi and have played around with most of the settings. I
> have noticed that in Auto the ISO is always 400. Should it not vary
> with the different scenes I have been shooting?

Why?

asherbenruby@gmail.com wrote:
: I just got an XTi and have played around with most of the settings. I
: have noticed that in Auto the ISO is always 400. Should it not vary
: with the different scenes I have been shooting?

It depends on the conditions you regularly shoot and on how the camera
decides what ISO to set while in Auto. Some cameras don't change the ISO
until the limits of F stop and "handheld" shutter speed are exceeded.
Then the ISO would change to bring the stops and speed back within limits.
So if most of your shots are outdoors or in well lit conditions the ISO
would remain fairly stable. And if when you go indoors and begin using a
flash, the camera would use the flash with the lower ISO. But if you shoot
in lower light conditions and turn off the flash the ISO would likely
jump.

So if your regular use is relatively in similar lighting, including
artificial lighting, it would be very likely the camera would stick with
an ISO what it's programming leans towards.

Randy

==========
Randy Berbaum
Champaign, IL

asherbenruby@gmail.com wrote in news:1177892852.084714.211120
@n59g2000hsh.googlegroups.com:

> I just got an XTi and have played around with most of the settings. I
> have noticed that in Auto the ISO is always 400. Should it not vary
> with the different scenes I have been shooting?

The range is only from 100-400, and only if you use the Green rectangle
mode. "P" mode does not use auto-ISO.

If you're using the green rectangle mode, and always getting 400, then you
are probably either shooting in moderately low light, or the focal length
of your lens is long and/or the lens is slow (high minimum f-stop).

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