Have been looking around the internet for various ways to calibrate lens/camera combos.
Adobe do a free lens profiler tool that is compatable with Photoshop CS5 (unfortunately this no bucks tool needs big bucks software), seems a perfect way to iron out anomalies of each lens - TC combo with some pre programmed pre sets (other lens presets are free downloads from users or by Adobe themselves, Camera RAW 6.2 has my Sigma 150-500mm APO).
But I was interested in Datacolor's new 'SpyderLensCal' tool, about £50 in the uk. This tool allows you to fine tune focus with various lenses that you use. You simply set the target up, focus on the target spot and take a picture, review it to find where the lens true focus point is and adjust accordingly (if your camera has focus fine tune, my D7000 does). But then looking at it again, I am sure I could make one (just rip the design). If you had a good high resolution printer, just print some targets and stick on some sturdy backing, it looks like the 'rule' is at a 45 deg angle.
I dare bet Paul would have made by tommorow
Adobe do a free lens profiler tool that is compatable with Photoshop CS5 (unfortunately this no bucks tool needs big bucks software), seems a perfect way to iron out anomalies of each lens - TC combo with some pre programmed pre sets (other lens presets are free downloads from users or by Adobe themselves, Camera RAW 6.2 has my Sigma 150-500mm APO).
But I was interested in Datacolor's new 'SpyderLensCal' tool, about £50 in the uk. This tool allows you to fine tune focus with various lenses that you use. You simply set the target up, focus on the target spot and take a picture, review it to find where the lens true focus point is and adjust accordingly (if your camera has focus fine tune, my D7000 does). But then looking at it again, I am sure I could make one (just rip the design). If you had a good high resolution printer, just print some targets and stick on some sturdy backing, it looks like the 'rule' is at a 45 deg angle.
I dare bet Paul would have made by tommorow