You should Not set your lens to infinity by using the infinity sign on the lens as most such marks are inaccurate.
and the infinity mark is not accurate
"Infinity" varies with the wavelength of light and temp; in fact, all focusing does... any preset marking can only be an approximation.
Well, the DOF *in front of* the focus point is great, but not beyond it.I'm asking this because I'm keen to learn ...........Surely when set to infinity the depth of field is so great, that wouldn't matter?
True for a some ancient camera camera with only one simple lens if front of but all ( without exception) modern lenses are compound lenses that will bring the two ends of the spectrum to the same focus - I expect you have heard of apochromatic lenses etc ?"Infinity" varies with the wavelength of light .
Yes, the APO designation is pretty... uhm...lenient.I expect you have heard of apochromatic lenses etc ?
Well, the DOF *in front of* the focus point is great, but not beyond it.
I think you are... where is the point of focus in that diagram? It's on the right side...Well according to this, unless I'm missing something,
I think you are