Bollan wrote in post #10796598
Does anyone know at what focal range the f-stops kick in on this one? 70-200 with f/4 and 200-300 with f/5.6 wouldn't be to shabby. Like having a 70-200 4 IS with a bonus 100mm on top.
Sorry to burst your bubble, but there is no way the 70-300L will still be F4 by 200mm.
RobDickinson wrote in post #10796615
Well 300/5.6 is what 53mm which is f4 at 214mm so thats the best your likely to see, hopefully its f4 at 200.
This math works for the 70-300IS as well, but as shown below the 70-300IS is nowhere near F4 at 200mm.
(Yes, I know the 70-300IS has a 58mm filter thread and the 70-300L a 67mm one. That might improve things a bit, but I cannot imagine even F4 at 135mm.)
thenextguy wrote in post #10796624
The old 70-300 goes like this:
70mm - f/4
85mm - f/4.5
135mm - f/5
200mm+ - f/5.6
I don't know if the new lens will follow that same pattern. Hopefully not.
Let's look at some other variable lenses out there:
15-85/3.5-5.6 (filter thread 72mm!):
F4 even before 17mm, F4.5 just past 24mm, F5.0 just past 35mm, F5.6 before 60mm.
100-400/4.5-5.6 (filter thread 77mm):
F5.0 by about 125mm, F5.6 just past 250mm.
neonlazer wrote in post #10791840
If it does not extend, I will eat my mouse..
In summary, if the 70-300L can still do F4 at 200mm, I will eat my mouse.