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Exposure control using using a tilt/shift lens
I have a TS-E 45 lens. I am constantly fighting exposure problems with this lens in conjunction with the 580EX flash. I almost always use the camera (a 20D) in manual mode, and the flash set to ETTL and high-speed sync enabled.
With no tilt or shift the resultant photo looks o.k. as the camera's meter was fine and the flash is operating in fill flash.
However, when I shift the lens and use the camera's meter the flash will blow everything out. I find that I have to increase the shutter speed of the camera by 2 or more (sometimes 3 or more) stops in order to get a better exposure while still using the flash. Sometime I also have to decrease the power of the flash by 2 or 3 stops, too.
What is the best way to control exposure correctly when tilting or shifting the lens without having to take a 2 or more shots to get it right?
With no tilt or shift the resultant photo looks o.k. as the camera's meter was fine and the flash is operating in fill flash.
However, when I shift the lens and use the camera's meter the flash will blow everything out. I find that I have to increase the shutter speed of the camera by 2 or more (sometimes 3 or more) stops in order to get a better exposure while still using the flash. Sometime I also have to decrease the power of the flash by 2 or 3 stops, too.
What is the best way to control exposure correctly when tilting or shifting the lens without having to take a 2 or more shots to get it right?
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