New 70-300 f/4-5.6L IS extended length pic

[Kayaker72]

I suppose there's no way to know for sure until some reviews come in. Based on the aperture change points for the current 70-300mm DO and non-DO, and the 100-400mm in terms of percent of zoom where the aperture shifts, I'd guess the new 70-200mm will be at f/4.5 before 100mm, at f/5 well before 200mm, and drop to f/5.6 a little after 200mm.

Hi John,


I've also noticed that the 70-300 mm L requires a 67 mm filter whereas the 70-300 mm DO requires a 58 mm filter. Do you think this could impact the aperture ranges ofthe70-300L?


Granted, anything better than what you've outlined is probably a little optimistic.


Brant

[neuroanatomist]

I've also noticed that the 70-300 mm L requires a 67 mm filter whereas the 70-300 mm DO requires a 58 mm filter. Do you think this could impact the aperture ranges ofthe70-300L?

I doubt it. The main difference between the new 70-300mm L and the 70-300mm DO is that the new lens starts at f/4 (like the old non-DO), whereas the DO lens starts one-third stop narrower at f/4.5 - that sort of shifts the transitions (since the DO has only 2/3-stop variation, while the other two vary over a full stop).