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Lenses Discussion of Lenses

Fast lens needed

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  #21  
Old 07-03-10, 18:32
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One of the reasons that many people only use the centre focus point.

Harry
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  #22  
Old 07-03-10, 20:52
nikthegeek nikthegeek is offline  
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Thanks for your help, so its pretty much accepted that the outer focus points are not as effective as the inner?


NIK
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  #23  
Old 07-03-10, 21:00
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The centre point is a cross type which means it can read both vertically and horizontally when using fast lenses (f 2.8 and faster I think) so is more positive in low light with a fast lens than the outer focus points. My 7D and others have cross sensors on all the focus points but not the 5 series. Having said that my old 40D is still pretty good in low light, the area where it struggles a bit aided by my ineptitude is taking birds in flight. (BIFS) but that is another story.
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  #24  
Old 08-03-10, 01:37
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Might not be in your price range but I can vouch for the 70/300 L IS, incredibly fast for a lense with such a large focus range even with the less capable 5D mkI, plus you can restrict it to only focus long range to reduce the time lost when you 'miss'.
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  #25  
Old 08-03-10, 19:30
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Canon do not make a 70/300 L IS lens so I am not sure which lens you mean. The only 70/300 lenses are all f5.6 at the long end which is not fast. They obviously focus quickly and accurately in good light but not so well in poor light compared to fast lenses as explained in post above.
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  #26  
Old 08-03-10, 20:28
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Yes you are quite correct Mike it's not an "L" lens, but it does get very good reviews.

At a little over a £1000 and only £100 less that the 70-200 L I think it's a non starter when compared with the 70-200 f/2.8 lens
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  #27  
Old 08-03-10, 20:35
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Oh i replied and it hasn't shown up, how rude!

Yeah my mistake, posting in the middle of the night and making daft mistakes - 70-200 L IS
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  #28  
Old 08-03-10, 21:24
nikthegeek nikthegeek is offline  
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Thats all right.

i appreciate your help

nik
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