Canon EF 200-400mm f/4L IS USM Extender 1.4x
Announced May 14, 2013 •
Telephoto zoom lens | Canon EF | 5176B002
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One gives compositional benefits, other gives more light and superb sharpness. Deciding which one, is a tough question. Can someone please suggest ? Usage is mostly mammals, early and late evening and in very dusty conditions. Does the 200-400 zoom sucks dust? How is the in built teleconverter, useful ? Not sure if I want to use the in built one and make it a slow F5.6. Thanks. --Tiger Photography
By: mermaidkiller (Aug 16, 2015)
Posted to: Canon SLR Lens Talk
Using an extender (tele converter) has the advantage that the absolute aperture (in mm, not as f/ number) remains the same with the same lens which allows a relative bright f/nubmer without T/C and yet acceptable with T/C. E.g the bright 200mm f/2.8L with T/C results in a yet acceptable 400 f/5.6. A zoom alternative (100-400 f/4.5-5.6L) results in a dim f/5 at 200mm. Why not make a 200-400 f/2.8-f/5.6 which replaces a T/C and a prime lens ? There is a 200-400 lens f/4L, but that is not a...
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