Aperture Help

[matt204]

Hello everyone.

I'm new to the dslr world and I have Canon 5d mark ii with a EF 24-105mm 1:4 L IS USM macro ultrasonic lens. On Av I can adjust the aperture from 4 to 22 but it does nothing to blur the background of the subject. When I adjust the apertrue number on the camera I do not see the lens open or close. I have no error codes. And on automatic it takes great photos but I wanted to play with the manual settings and get to know how to use them. Any ideas? Thank you!

[wq9nsc]

Thanks Ernie!  

Rodger

[Waddizzle]

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@matt204 wrote:

Thanks for the input everyone!. I can see now I didn't have a issue with the lens it was that the lowest f stop is 4 and I need to get a lens that goes to a 2.8 or 2 and of course I need to get out there and practice with the camera!

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Practicing is a must.  But, it also helps to know what you are doing, too.  An understanding of basic photography is something that should not be ignored.  If you do not understand exposure and depth of field, then you will never learn to use the camera in the creative modes.

[Waddizzle]

You do not really need a wide aperture for background blur.  It helps, but it is not mandatory.  This was shot with a 6D at 100mm at f/4.5.  I was using the EF 100-400mm f/4.5-5.6L IS II USM lens.  

The subject was very close to the camera.  Obviously, the background is relatively quite distant.