M240 Liveview polarizing filters and precise framing

[Manicouagan1]

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I use my M9 for Landscape photography. I have two questions about the ergonomics of the M240 without the electronic viewfinder by those who have used the camera:

1) Is it practical to set a screw-in polarizing filter at a desired angle using live view with the LCD display on the back; can you hold the camera so you can see the screen and twist the filter at the same time.

2) Is the screen on the back of the camera bright and clear enough and have enough resolution to carefullly compose images with 21mm and 24mm lenses? Can you spot small branches the intrude into the field of view and be sure that you have not chopped off the top of something critical in the image.