Depth of Field for EOS 50mm 1.8 II lens compared with former Canon A570

[Don Carlson]

Bob Atkins' explanation on Depth of Field was easest for a non-mathamatician to comprehend!  I now understand why my former Canon A 570 3X does not give good DOF when compared with my present EOS 50mm 1.8 II lens when using both to image the platform speaker(s) 7 meters from camera at 10:00 a.m. inside a church sanctuary (no flash allowed) usiing AV mode setting and 1/100 shutter speed at 400 ISO using both electric lighting supplemented with California daylight streaming in from large side witndows of the church.

But Bob Atkins' calculation table (at end of his web site) only allows me to calculate for my former Canon A570 3X; can anyone tell me what the equivalent DOF (in inches) would be for my new Canon 50mm 1.8 II lens would be (approximately).  I use 1.8, 2.0 and if enough light use 2.2, all at about 1/100 second at ISO 400. 

[KeithB]

Use the calculator on this page:
http://www.bobatkins.com/photography/technical/depth_of_field.html

We need to know what kind of camera you have.  In the calculator you would want to use the "full frame" setting if the sensor is 35mm sized or the "APS-C" setting if your camera can use EF-S lenses.

[oldtool]

another calculator

http://dofmaster.com/dofjs.html

This one uses inches or feet