70-200 f4- soft photos

[gercam]

Thanks again for replies. I used my 70-200 f4.0- would I have been better to use my 17-55?

Think the al- servo was definitely wrong too

 

[simonblue]

Yes it would have been better to use your 17-55mm for a group photo,but looking at the link you gave on the 17-06, when i looked at it on flicker,doesnt seem that soft to me

 

[49Clicks]

Looks like your lens might need a micro ajustment, looks a little like its backfocused slightly. Not major really.

What camera body do you use? Which lens?

 

[HoppyUK]

A shorter lens, and then the aperture would have been fine, I never shoot smaller than f8 unless I'm using it as a tool to lower shutter speed.

This is misleading. It implies that using a shorter lens would have given more depth of field. It would not, if the shooting distance is reduced so that the image is framed the same, ie the subjects fill the frame at the same size, then depth of field remains the same regardless of the focal length used (at same f/number of course).

Thanks again for replies. I used my 70-200 f4.0- would I have been better to use my 17-55?

Think the al- servo was definitely wrong too

Entirely subjective. You would have been a bit closer using the 17-55, and that would have changed the perspective a bit, including more background behind the sitters. Not sure it makes much odds in this case.

 

[HoppyUK]

Looks like your lens might need a micro ajustment, looks a little like its backfocused slightly. Not major really.

What camera body do you use? Which lens?

There is no evidence of that I can see. And unlikely in any case.

 

[POAH]

Think the al- servo was definitely wrong too

for static shots the focus will go back and forwards so they are probably a bit OOF

I would suggest to the op to have a real good read of the 40D manual.

 

[gad-westy]

Thanks again for replies. I used my 70-200 f4.0- would I have been better to use my 17-55?

Think the al- servo was definitely wrong too

It depends how you're using it. I use back button focussing and continuous servo focussing 100% of the time. I just release the focus button when I want to lock focus.