Problem with auto mode focus on my xsi

[goodgollycr]

When I am shooting in auto for a quick snapshot, the auto mode uses such a narrow DOF that most of my picture is blurry. This is quite annoying when I am taking a picture with several people in it. Do other users find this, too? Any tips, other than using manual mode?

I'm wondering if the T2i or Nikon d90 have this problem too?

ETA: Here is an example:



My daughter's jeans are in focus, their faces are not. It looked ok on the LCD so I didn't get another one. Sometimes my kids are just tired of me trying and trying to get things perfect in manual, so I use auto.

[inkista]

Ummm... maybe, learn how to adjust the aperture for the DoF you want? Checking with the DoF preview button is always good, too.

You're probably forcing the camera to go with a max. aperture of the lens by shooting in lower light and using too low an iso setting, which is going to thin your DoF.

[goodgollycr]

This is in auto mode. I understand that leaving auto mode will help, but sometimes I need quick and easy auto.

[dcclark]

Originally Posted by goodgollycr

This is in auto mode. I understand that leaving auto mode will help, but sometimes I need quick and easy auto.

In which case, the camera will choose the settings for you -- you take what you get!

Not sure about Canons, but on Nikons, going to P (Program) mode may help. Turning one of the command dials will "shift" the metered settings to an equivalent set, but with different shutter/aperture combinations. That might help.

[RichardTaylor]

Auto means you have to take what the camera gives you.

"P" mode is similar to the Nikon; you can shift the aperture/shutter speed to something that more suits your needs.

I would shoot in aperture priority with a small aperture (f11-F16 or even F22) and let the camera set the shutter speed. Just make sure that your ISO is high enough so that camera movement will not become a problem.

All cameras work similarly.

[Vagebond]

I borrowed the EXIF data from flikr:
Exposure: 0.067 sec (1/15)
Aperture: f/4.0
Focal Length: 38 mm
ISO Speed: 800
Exposure Bias: 0 EV
Flash: Off, Did not fire

You're at the edge of what can be done in available light without camera shake at this focal length: highest program ISO 800, 1/15 sec. shutter speed (you have a steady hand), and maximum aperture (low depth of field).

Auto did what it's supposed to do, but without extra light you won't get the DOF you need for this picture, a higher F-number/smaller aperture.

If you really insist on auto, maybe, just maybe, aim the centre focus point a little higher up (forehead or so) to move the average distance back a little so the knees get out of front focus, press and hold the button half way to fix focus, recompose and take the shot. It might help a bit but just a bit. Quick and easy it ain't.

[goodgollycr]

Thanks, I think I'll need to get my manual out and read it again and explore the 'p' mode and auto focus settings.

I really do try to get out of auto most of the time, this has just been a frustration of mine when I did use it and I didn't know if it was a limitation with my camera or common for all.

thanks again.