t7i uses maxium ISO when in Auto Iso - no matter what setting I use

[feedrail]

i use auto iso in shutter priorty (TV) and no matter shutter speed 100 to 2000 its shoot at my max setting 6400? What up? Also if I use it in AV no matter the setting it shoots iso 6400 or if I set max to 3200 all shots are shot in 3200.

Thanks

[jrhoffman75]

Are you outside in daylight? What are your lighting conditions.

[feedrail]

It doesn't matter it can be full sun and I can set shutter to 1/30 up to 1/1600 and it has no effect

[Waddizzle]

What lens are you using?  It sounds like the automatic aperture might not be working.  Try a different lens.

[jrhoffman75]

You could try clearing all camera settings and custom functions just in case you inadvertently set something you didn't want. If that doesn't work give Canon a call at 1-800-OK-CANON. 

[ebiggs1]

"...its shoot at my max setting 6400..."

What is your minimum ISO setting?  Did you check it?

[jrhoffman75]

I don't believe Rebel series allows a minimum ISO to be set.

[ebiggs1]

It's been too long since I owned a Rebel to remember.  Just a shot in the dark.

[feedrail]

I use 100-400 5.6 tried different lens. What ever I sent the max ISO for auto I use, that's the ISO it uses.

[jrhoffman75]

What happens if you set it to P mode?

What Av value is the camera setting when you are in Tv mode?