well, i suppose using the ND filters with live view should be safe for our eyes ... right?
ND block visible lights. Sun has more than just visible lights. Sensor have IR filter (weak one) your eyes have ? ND filter have ? Do you know how much direct exposure you are facing when you look thru a concentrated set of lens designed to focus light into your eyes ? I wouldn't even wanna trust a B+W UV filter to be fully capable of blocking all the UV lights spectrum. Given the magnitude of the UV from a sun in direct line of side, I highly recommend you don't even trust pple in this forum saying what is safe and what is not. 10 years down the road when your eyes starts to give you problem because of this single unnecessary exposure to excessive IR or UV, no one will be responsible for it. Be responsible to your eyes, seek the authority in this area. Someone recommended go to the science centre to get the right equipment, get it. You are doing this for hobby, it's not a life and death decision, no need to take unnecessary risk over a few bloody bucks. If not, don't even bother to try it.