What I'd like to know:
Is it safe to look directly at the sun through the LCD viewing screen
while taking many sunset photos?
I've been photographing sunsets since buying my first digital in 2001.
I've never encountered any problems. If it's too bright to look at -
more than 2 or 3 diameters from the horizon, then wait. If you can look
directly for a second or so and have an afterimage but nothing more,
then there's no problem.
Remember that clouds make the most spectacular sunsets - in western
Scotland it often rains mid-afternoon making this area the most
beautiful for sunsets.