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    Nickfrayne
    12 Jan 2010 - 3:34 PM

    I have a canon 70/200 IS USM F2.8L, shall I buy a TC1.4 or a 300L IS USM, whats best, I know the TC is cheaper, but mayb the 300mm lens would be slightly better, any views please guys. Thanks Nick

    Last Modified By Nickfrayne at 12 Jan 2010 - 3:34 PM
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    12 Jan 2010 - 3:34 PM

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    Coleslaw
    Coleslaw e2 Member 913403 forum postsColeslaw vcard Wales28 Constructive Critique Points
    12 Jan 2010 - 3:45 PM

    Since it is only 300 you are after, and you have 70-200 2.8, TC would be my suggestion.

    ripleysalien
    12 Jan 2010 - 4:24 PM

    Agree, converter all the way,

    JackAllTog
    JackAllTog e2 Member 53591 forum postsJackAllTog vcard United Kingdom58 Constructive Critique Points
    12 Jan 2010 - 4:59 PM

    The 300mm must be the better lens - itís not a zoom.
    The 300mm come in f4 & F2.8, which one were you thinking?

    The TC will add more glass and reduce max aperture.
    A 1.4 TC will reduce a stop of light taking the 70/200 f2.8 to f4, but 1.4 x 200 only = 280mm, could use a 2xTC but then lose 2 stops of light.
    Also AF will not work with some combinations of TC and Lenses, but I think your probably OK with yours.

    If you can afford it get the 300mm, shaper shots and more reach.

    lawbert
    lawbert  71713 forum posts England15 Constructive Critique Points
    12 Jan 2010 - 5:15 PM

    Having looked at your portfolio another consideration is AF speed....
    Once you attach a tc you will slow your lense's AF speed down to a snails pace.
    If the 300mm your talking of is the f4 version then forget a tc as you will again lose to much AF speed and if its the F2.8 you will be able to a 1.4x pretty comfortably.

    cambirder
    cambirder  107202 forum posts England
    12 Jan 2010 - 5:34 PM


    Quote: Once you attach a tc you will slow your lense's AF speed down to a snails pace.

    Can't say I've noticed that on my 70-200 f2,8

    John_Frid
    John_Frid  8514 forum posts United Kingdom56 Constructive Critique Points
    12 Jan 2010 - 5:53 PM

    I use a 1.4 TC with my 70-200 f2.8 and I find it works very well indeed. There is no easily noticed impairment to either AF speed or image quality - at least at the sizes I print to (A4).

    Whilst I am fairly sure a quality prime 300mm (f4 or f2.8) will have the edge over the 70-200 + 1.4 TC, the question is are you prepared to shell out at least £1,000 for that edge.

    If you want longer reach, then maybe the 100-400mm is worth considering. Yes it will be a further stop slower than the 70-200 + 1.4 TC, but you will gain an extra 120mm or reach. You could then add a 1.4 TC to that and have 560mm of reach (albeit at a maximum aperture of f8).

    Whenever I consider these things I baffle myself with the options, and end up wondering why I didn't pick a more straightforward and less costly hobby.

    lawbert
    lawbert  71713 forum posts England15 Constructive Critique Points
    12 Jan 2010 - 6:39 PM

    Has anyone tried a 700-200 f2.8 with a 1.4 tc attached aimed at a high speed moving subject?
    In my guided opinion the Af will slow and the sharpness of the lense will drop off.

    arhb
    arhb e2 Member 72232 forum postsarhb vcard United Kingdom68 Constructive Critique Points
    12 Jan 2010 - 6:57 PM


    Quote: Has anyone tried a 700-200 f2.8 with a 1.4 tc attached aimed at a high speed moving subject?
    In my guided opinion the Af will slow and the sharpness of the lense will drop off.

    Yes, my pf banner shot of a stooping falcon, was taken using a 70-200F4L (IS turned off), with a 1.4tc attached.
    I dont remember the exact camera settings but as you can see, I nailed it.
    Or did you mean something faster than a stooping falcon?

    lawbert
    lawbert  71713 forum posts England15 Constructive Critique Points
    12 Jan 2010 - 7:29 PM

    Ok Ok....A teleconvertor attached to a 70-200 be it an f4 or f2.8 will retain the same af speed as the lens without it.
    If not a tc will most certainly improve the lenses af speed.

    How foolish of me to think different!!

    Coleslaw
    Coleslaw e2 Member 913403 forum postsColeslaw vcard Wales28 Constructive Critique Points
    12 Jan 2010 - 8:21 PM

    Have a look at Neil (Javam) PF.
    He has some stunning airshow shots with 70-200 F2.8 + 2x TC (yes, 2x!).

    John_Wannop
    John_Wannop e2 Member 952 forum postsJohn_Wannop vcard Wales
    12 Jan 2010 - 8:29 PM

    I Have used my 70-200 f2.8 with a 1.4 Extender many times and have hardly noticed any drop in AF performance.

    arhb
    arhb e2 Member 72232 forum postsarhb vcard United Kingdom68 Constructive Critique Points
    12 Jan 2010 - 8:34 PM


    Quote: Have a look at Neil (Javam) PF.
    He has some stunning airshow shots with 70-200 F2.8 + 2x TC (yes, 2x!).

    I was also going to mention that Cole - I think this(70-200F2.8) and the 300mm F2.8 are two lenses that get very good results from the 2x tc.

    Last Modified By arhb at 12 Jan 2010 - 8:35 PM
    KBan
    KBan  9457 forum posts England4 Constructive Critique Points
    12 Jan 2010 - 9:48 PM

    i use a Nikon 70 200 2.8 VR with a 1.7 converter for my bird shots

    Keith

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