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Lens dilemma!

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    boxer57
    boxer57  785 forum posts United Kingdom
    14 Mar 2008 - 12:00 PM

    I will shortly be in a position to buy a new lens, I have narrowed my choice down to 2 the Canon 100-400L f4.5/5.6 or the Sigma 100-300 f4 and a 1.4x TC, I will mainly be shooting motorsport and wildlife with the combination.

    Which would you choose and why?

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    14 Mar 2008 - 12:00 PM

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    ripleysalien
    14 Mar 2008 - 12:32 PM

    I now have the 100-400 and like it for the extra reach, and its and L lens on a 5, BUT i had the 100-300 sigma and for me I think it was a tad sharper, the zoom is easier to use, Twist rather than the trombone type.
    Either lens loses auto focus with the converter i think, I have the matching 2x sigma one as no one wanted it, its good but my eyesight is crap and manual focus is for me not good.
    SO if I was here i would say go for the sigma TBH UNLESS you have a 5D then the Canon one.
    HTH

    Steve

    sidaorb
    sidaorb  83857 forum posts England2 Constructive Critique Points
    14 Mar 2008 - 12:36 PM

    Steve,

    Not sure if you can stretch the budget to a s/h Sigma 120-300 F2.8, just got one, spot on lens.

    Still has great AF with a 1.4x and can still take a 2x for wildife photography.

    1.4x = 420mm F4
    2x = 600mm F5.6

    Carl

    imagegrill
    14 Mar 2008 - 6:02 PM

    The canon 100-400 L will focus with a 1.4x converter, I can vouch for that on a 5D.
    But that's not what you asked Wink

    Any converter will reduce quality and the 1.4 will add a stop. Go for the 100-400 L and reduce the messing around with the extender on the sigma.

    glsammy
    glsammy  8194 forum posts United Kingdom1 Constructive Critique Points
    14 Mar 2008 - 8:52 PM


    Quote: Steve,

    Not sure if you can stretch the budget to a s/h Sigma 120-300 F2.8, just got one, spot on lens.

    Still has great AF with a 1.4x and can still take a 2x for wildife photography.

    1.4x = 420mm F4
    2x = 600mm F5.6

    Have you tried 2 x 1.4X? I've done some test and that combination seems to work better than a straight 2x. (At least on my Bigma!) I know your not quite reaching 600mm with that combo, but it's close enough and in my tests the results were better. Smile




    Carl

    tomcat
    tomcat e2 Member 85912 forum poststomcat vcard United Kingdom15 Constructive Critique Points
    14 Mar 2008 - 9:32 PM

    If it is within your budget..how about the Canon 400mm 5.6 prime
    Especially if you are shooting motor sport
    Auto focus is wicked

    Adrian

    Last Modified By tomcat at 14 Mar 2008 - 9:33 PM
    ripleysalien
    14 Mar 2008 - 11:31 PM


    Quote: The canon 100-400 L will focus with a 1.4x converter, I can vouch for that on a 5D.
    But that's not what you asked


    It will if you tape the contacts, I have tried a 1.4x and the 100-400 on my 5 without the contacts taped and it will not auto focus, Canons word is only 2.8 or faster lenses will auto with either converter, but if yours works, great.

    Steve

    Having used both the sigma 100-300 will beat the 100-400 hands down and I have 5000 of canon kit so its not a brand thing, I REGRET getting the 100-400 big time, I should have got the 70-200 f2.8 and a 1.4x.

    Last Modified By ripleysalien at 14 Mar 2008 - 11:35 PM
    cambirder
    cambirder  107202 forum posts England
    14 Mar 2008 - 11:40 PM


    Quote: Canons word is only 2.8 or faster lenses will auto with either converter

    No, F4 lenses work fine with the 1.4.

    polka
    polka  6
    15 Mar 2008 - 4:00 PM

    doesn't it depend on which body the converter and lens is attached to?

    Last Modified By polka at 15 Mar 2008 - 4:02 PM
    cambirder
    cambirder  107202 forum posts England
    15 Mar 2008 - 4:13 PM


    Quote: Doesn't it depend on which body the converter and lens is attached to?

    Series 1 Canon's will AF at f8 (center point only), all lesser bodies at f5.6.

    XxPaulxX
    XxPaulxX  8256 forum posts England
    15 Mar 2008 - 5:40 PM


    Quote: Quote:The canon 100-400 L will focus with a 1.4x converter, I can vouch for that on a 5D.
    But that's not what you asked
    It will if you tape the contacts, I have tried a 1.4x and the 100-400 on my 5 without the contacts taped and it will not auto focus, Canons word is only 2.8 or faster lenses will auto with either converter, but if yours works, great.

    Steve

    Having used both the sigma 100-300 will beat the 100-400 hands down and I have 5000 of canon kit so its not a brand thing, I REGRET getting the 100-400 big time, I should have got the 70-200 f2.8 and a 1.4x.

    I hate to see people unhappy, let me give you 50 for the 100-400 to try and get rid of that regret of yours Wink

    Paul

    tomcat
    tomcat e2 Member 85912 forum poststomcat vcard United Kingdom15 Constructive Critique Points
    15 Mar 2008 - 6:26 PM


    Quote: Either lens loses auto focus with the converter i think

    The Sigma 100-300 works with the 1.4x OK and is still quite responsive
    All of my kite shots from Gigrin were taken with the same combination +20D

    Adrian

    Last Modified By tomcat at 15 Mar 2008 - 6:27 PM
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