Quote:
Originally Posted by 360 Photography
As a matter of interest does anyone know the overall dimensions of the 24-70 2.8L and 24-105L IS f4 when at full zoom?
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As far as I'm aware the 24-70 extends "inside" the hood, maybe slightly past it, while the 24-105 extends as a normal zoom lens does. Please be aware than I've no personal experience with either of these so I could well be in error... Hopefully we can get some info from actual owers to confirm this.
As an extra note, as you mention this will be used in a water housing I would lean towards the 24-70 simply due to it being a faster f/2.8 lens as light is at a premium when you get underwater.
Quote:
Originally Posted by 360 Photography
is there much difference in performance/quality between the Canon 50mm F1.8 and the F1.4 or in the main difference in the price due to the build quality?
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Basicly you are mainly paying for better build quality and a USM focus motor, and to a lesser extent, better IQ. Due to the 50 1.8 having a plastic body and mount and no USM there are many who feel the 50 1.4 is worth the extra cash, especially if they have the extra cash to spend
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The lens construction of the 50 1.4 also leads to
slightly better IQ (reportedly quite noticeable in "bokeh" quality) due to it's
7 elements in 6 groups design opposed to the 50 1.8's 6 elements in 5 groups.
The thing is, for what you intend to use it for it may not be worth going for the 50 1.4. Also when you can import the 50 1.8 for a touch less than £60 it'd probably be a better idea to try it out first, you can always sell it on and not loose more than £10-15 if it doesn't suit you.
