My camera has an 18-250mm zoom. This first picture demonstrates the standard focal length: 63mm. (Canon EOS 350D, 1/80s, f/5.0).
This shot shows the same scene at the widest angle: 18mm (1/125s, f/5.0). Finally, this third shot shows the same shot on the maximum telephoto setting: 250mm (1/60s, f/6.3):
The photographs were taken in the church yard of Little St. Mary's in Cambridge. It was (and still is) a miserable cold day with barely enough light - even at midday - for the auto-focus to function. In the circumstances it would have been better if I'd used a tripod for these shots; only the second one - wide angle view - comes within the comfortable range for hand-holding the camera. Despite that I'm chuffed that my first time out for this course I've learnt something I didn't know about my camera.
I've been thinking since doing this exercise about what the benefits are of having this information - is it going to make me take better photographs? I think it should, when I get used to thinking about it while out with the camera. At the moment to compose a picture I just move the lense while I'm looking through the viewfinder until I see something I like the look of. Being clearer about how focal length effects composition however should enable me to look at a scene and envisage how it's going to look as a photograph when shot at particular focal lengths - making it easier to realise the scene I'm trying to capture.
I'm also going to attempt a shoot with a prime lense in the not too distant future - I've been advised that the discipline this imposes can be very beneficial in terms of composition.
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