Hi Folks,
First, I have to say, I *love* ML - it has provided some absolutely super extensions to my 550D functionality.
I use my camera mainly for astrophotography, usually coupled to a high-quality 80mm apochromatic refractor, but often with a regular Canon AF lens which I always end up setting back to MF in order to achieve an accurate star-focus. This takes a bit of trial and error to achieve focus and I'm never quite sure if I have the sharpest point or not.
When shooting "tethered", I use a Windows application called BackyardEOS - some folks here may well be familiar with it. One of the focus-aid features it presents is a measure of the FWHM (Full Width at Half Maximum) - this is a measure (in camera pixels) of the width of a chosen object (typically a star, but a planet would work, too) across the line where the intensity is equal to half the maximum (i.e. the brightest part, typically the center). This feature is incredibly, incredibly powerful - I can be assured I have the sharpest possible focus each and every time by tweaking the focus in order to minimize that number.
I think (and I realize I may be in a minority here) this would be a great feature to build into the focusing aids in Magic Lantern.
Grant
First, I have to say, I *love* ML - it has provided some absolutely super extensions to my 550D functionality.
I use my camera mainly for astrophotography, usually coupled to a high-quality 80mm apochromatic refractor, but often with a regular Canon AF lens which I always end up setting back to MF in order to achieve an accurate star-focus. This takes a bit of trial and error to achieve focus and I'm never quite sure if I have the sharpest point or not.
When shooting "tethered", I use a Windows application called BackyardEOS - some folks here may well be familiar with it. One of the focus-aid features it presents is a measure of the FWHM (Full Width at Half Maximum) - this is a measure (in camera pixels) of the width of a chosen object (typically a star, but a planet would work, too) across the line where the intensity is equal to half the maximum (i.e. the brightest part, typically the center). This feature is incredibly, incredibly powerful - I can be assured I have the sharpest possible focus each and every time by tweaking the focus in order to minimize that number.
I think (and I realize I may be in a minority here) this would be a great feature to build into the focusing aids in Magic Lantern.
Grant