I'm still a tiny bit confused about how resolution and crop mode affect the image... is resolution simply determining how much of the sensor area to use and zoom mode becomes only a crop?
i.e. if we stay in the same resolution as regular but do a 5x "zoom" (read: "crop"), is it the same quality but simply a smaller field of view and no aliasing?
Also, does crop mode affect depth-of-field (assuming same distance from subject)?
Thanks!
Resolution is simply the output size you want to record in.
The difference between normal and crop is not a resolution change but how information is read from the sensor, let's assume you want to record at 1080p we'll in normal record mode the camera uses the whole sensor but because the sensor is so much larger than 1920x1080 it has to throw away a lot of data in between lines, in crop mode however it uses the very center of the sensor at 1920x1080 resolution or what ever res you picked, while it's true that the sensor is being cropped in zoom modes you are actually getting a 1:1 ratio in pixels unlike in normal which is splitting up lines from the sensor to match the resolution you picked and can end up with some nasty moire aliasing.
If you are trying to frame the same shot in normal and zoom with the same lens it would require you to set the camera a lot father back in zoom mode which would affect your depth of field I would say.