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Thread: Which 300mm is better?

  1. #1

    Default Which 300mm is better?

    Which of the following is better to achieve 300mm (or near), assuming that the cost is about the same:

    1) using a Sigma APO 1.4x TC on a Sigma EX 70-200 f2.8

    2) using a consumer grade 75-300mm f4.0-5.6 lens, be it Canon, Sigma, Tamron etc.

    I understand that the TC will cause some quality degradation and loss in contrast, but will be result be much better than option 2? I already have the Sigma 70-200 f2.8.

    TIA!

  2. #2
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    Either the OEM 300mm f/4 or f/2.8, or the Sigma 70-200 or OEM 70-200 on a DSLR

    Regards
    CK

  3. #3
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    The Sigma 70-300 DL is sharp and cheap $360+, but AF spoil easily and also may become incompatible with future camera bodies

  4. #4

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    thanks for the input guys, but please help me with my query specifically, thanks a mil!

  5. #5
    ClubSNAP Idol Adam Goi's Avatar
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    I have no experience with the above but assuming the Sigma zoom is optically 'comparable' to the Canon's offering, I'd suspect a Kenko Pro 300 1.4X with the Sigma will be sharper than a consumer EF 75-300mm.

  6. #6
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    Default Re: Which 300mm is better?

    Originally posted by Tweek
    Which of the following is better to achieve 300mm (or near), assuming that the cost is about the same:

    1) using a Sigma APO 1.4x TC on a Sigma EX 70-200 f2.8

    2) using a consumer grade 75-300mm f4.0-5.6 lens, be it Canon, Sigma, Tamron etc.
    If you already have the Sigma then I would say option 1 is better all things considered. Firstly you don't need to carry around an extra lens. Secondly, and in more direct response to your question, the optical quality should be better. For starters, you have the option of f4 which the second option doesn't offer at all. Secondly, if you shoot at f5.6 with option 1, you are already stopping down a stop which significantly reduces TC degradation.

  7. #7
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    Option 1 is better, not much quality loss from 70-200. Or else get a 50-500 and u will have a very different feel with the 500mm.

  8. #8

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    Get the Tc......

  9. #9

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    thanks Adam, Jed, Tom n Tom....

    you guys have been most helpful

  10. #10
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    forget about using a TC if you are going for the 300/5.6 zoom. u almost see nothing under lousy light conditions, with any 2x TC at f5.6 = f11. f4 at 300mm should be the min for 2x.

  11. #11

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    thanks boochap, I know that. I'm using the TC on a f2.8, not f5.6.

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