[Argee]

I have recently bought a Hitech Pro 10 stop square 85mm filter for my P size filter holder. I have been practicing fitting it and getting used to setting it up on my Canon EOS 60D and the preparation for getting the correct exposure. I read however that it is possible to use "Exposure simulation" to "see through" the filter, when fitted, and possibly then use exposure compensation to achieve the correct settings. Or is it all guesswork? Does this mean that in live view I can see the actual image change when setting exposure compensation, or do I have to switch between live view and the exposure simulation menu all the time. I have enabled expo sim and tried it but cannot see any apparent change in live view when I change exposure comp. I have made some test shots and CAN see the change in the finished image but can I see it in real time in live view?

Also I notice that when I fit the filter in the nearest of the three slots in my holder, the gasket does not fit snug to the lens. There is a slight gap between filter gasket and lens rim. I would have thought some light would get in here. Am I correct or am I missing something?