rvaubel
Well-known
Jimbobuk
Your questions indicate that you ARE going to figure this out. I dont have enough time to go into depth but will after I placate my wife.
But briefly, your right about the depth of focus being deeper behind the focus plain. But at F1.4 its so shallow it doesn't really matter. Do the near focus test with only the 40mm F1.4 at say 1 meter only. Dont keep changing variables, lenses, distances....it gets to confusing.
Use a ballpoint to draw a horizontal line next to lines of text put a very short vertical line thru it. It is easier to focus on the vertical line but it is at a slightly different distance from the lens, so kept it short! Take multiple pictures, refocusing each time. This is best done on a tripod because moving your head even an inch ruins the results.
When your done, your images should be focused on the "+" with only one or two lines off regular newsprint text in focus in front of and behind the "+"
This is the first step. Your camera has to pass this test first.
More later
Rex
Your questions indicate that you ARE going to figure this out. I dont have enough time to go into depth but will after I placate my wife.
But briefly, your right about the depth of focus being deeper behind the focus plain. But at F1.4 its so shallow it doesn't really matter. Do the near focus test with only the 40mm F1.4 at say 1 meter only. Dont keep changing variables, lenses, distances....it gets to confusing.
Use a ballpoint to draw a horizontal line next to lines of text put a very short vertical line thru it. It is easier to focus on the vertical line but it is at a slightly different distance from the lens, so kept it short! Take multiple pictures, refocusing each time. This is best done on a tripod because moving your head even an inch ruins the results.
When your done, your images should be focused on the "+" with only one or two lines off regular newsprint text in focus in front of and behind the "+"
This is the first step. Your camera has to pass this test first.
More later
Rex