?'s on Focus and focus points

With regards to landscapes, if increase the aperture to the max for lens f/22, in theory should everything from in the frame be in focus or are there limits to the depth of field?

Is the center focus point usually the sharpest?


For landscapes, where in the frame is the best place for the focus point for the sharpest images.

#1-There are limits, check this site http://www.dofmaster.c​om/dofjs.html then go to this part http://www.dofmaster.c​om/hyperfocal.html

#2-Yes, check your lens on pages 209 and higher. http://software.canon-europe.com …_Lens_Work_Book​_10_EN.pdf you need to learn to read the tables.

#3-generally 1/3 from bottom of image.

Do a search on hyperfocal length.