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Am trying to get 1.4x extender for my Sigma 150-600 contemporary lens (canon Mount), would like to use it for wildlife / bird photography.

Camera am using: 5D Mark III (placed order for R5 - waiting on it :))

Does 1.4x TC works well on this lens?

If So which one should i get Canon 1.4x or Sigma 1.4x

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1 Answer 1

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  1. Better get the Sigma, the lens is designed for it

  2. The 1.4 TC will make it a 840mm lens, but also a F/9 lens. So:

    • The AF will struggle, assuming it works at all, forget it for birds in flight (but then, aiming at birds in flight with a 840mm lens requires a lot of training)...
    • Even with decent IS, you don't want to get too long exposures (especially on a dashing sparrow), you need all the light you can and the TC is taking some.

So IMHO, the TC will soon return to your bag (I have one, but I don't use it for wildlife...).

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  • \$\begingroup\$ Yes I did order sigma 1.4x and waiting on it. Will give a try, if doesn't works for me then goes into the bag.:) \$\endgroup\$
    – Sreedhar
    Sep 11, 2020 at 3:12

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