what about a 70-200 1.5x f/2.8 ??

Started Feb 10, 2013 | Discussions thread
Lemming51 Forum Pro • Posts: 14,642
Re: what about a 70-200 1.5x f/2.8 ??

joger wrote:

in the advent of the 200-400 1.4x I am wondering how much it would cost to build a 70-200 f/2.8 with built in 1.5x extender similar to the 200-400

It should be doable with following data:

  • 70-200 f/2.8 base lens
  • 100-300 mm f/4.0 with 1.5x extender
  • perfect optical quality and still below 2 kg
  • price 3 k USD

I'm sure it's been thought of. It'd be 1.4x instead of 1.5x so that adding a conventional 1.4x is effectively f/5.6 and would still AF with all EOS bodies.

70-200/2.8 is a very competitive class, and making yours even longer, heavier, and more expensive (where the L II is already pushing the boundaries) with built-in 1.4x I don't think would pay any dividends.  Those concerns don't apply to the 200-400/4 where there is virtually no competition, and that class of lens is so large and heavy to start that building in the 1.4x is not a significant increase.

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Canon EOS 40D Canon EF 50mm f/1.8 II Canon EF-S 15-85mm f/3.5-5.6 IS USM Canon EF 70-200mm f/2.8L USM Canon EF-S 55-250mm f/4-5.6 IS STM +5 more
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