I'm working on a shoot that intends to mask the results in post to create a 16:9 image (they do not want us to shoot with the DVX in letterbox however, as they want to mask as they see fit). But if I switch to letterbox just to set some tape over my LCD, will this be identical to what the producers will arrive at by masking in post? It's relevant to how I frame my shots. If the letterbox is not the same as a standard 16:9 mask, then I run the risk of chopping people's heads off. I've seen a variety of "sizes" from the anamorphic mask to the 16:9 mask. Any suggestions?