That's what I actually do/ use on my R. I works quite fine although the 10,7MP imagine lack some details imho. Probably have to compare pics taken with an extender vs. crop-mode.
Could you please explain how you calculated the MP size with crop mode? A mile is 1.6 kilometers, right? So a kilometer would be the inverse? We round it off to 0.6 miles right? So 30 kilometers is 18 miles?
Ok, now does something happen with megapixels because they aren't a linear measurement? Or would it be about 18 MP?
Thanks! I'd like to know before I start using crop mode.