[Arthur Macmillan]

I remember reading...it seemed to me he said if he already had the 75-300 it wasn't enough difference that he would change.  I do care about sharpness, but I find most of the time I am using the lens, I'm using it at 300mm anyway, so have I am thinking about get the 300mm F/4L IS.  Because I use a 70D and prefer the 55-250mm STM the only reason I keep it is for when I get a FF.  But this discussion is making me think, better to put it towards the 300 prime. 

 

I appreciate your comments everyone.  You have helped me think this through!