Depth of field calculator

End picture size and required pixel size
Seeing capabilities angle	Watching distance mm	Smallest detail needed mm
Width mm	Heigth mm	Aspect Ratio mm
Required width pixels	Required heigth pixels	Required dpi
Film plane parameters
Width mm	Heigth mm	Circle of confusion
Lens settings
Focal length mm 24 28 35 50 85 100 135 200 300 400 500	Focus distance m	Aperture 1.4 2 2.8 4 5.6 8 11 16 22 32
Object size m x m
Depth of field
Distance near sharp m	Distance far sharp m	Hyperfocal distance m
	Help text (press next to field to get the help text here)

Canon EOS 20D links (Link to parent category)

Dpreview 20D review
Luminous Landscape part 1
Luminous Landscape part 2
Luminous Landscape field test
Photo.net review