How fast can you change from a 200mm focal length to 28mm when covering a photo-call? If you are using the new Canon EF 28-200mm f/3.5-5.6 USM or DC Motor version zoom lens, that should be less than half a second. If you don't have this lens but a combination of two zooms, like the EF 28-105mm f/3.5-4.5 USM and EF 70-200mm f/4L USM or the EF 28-70mm f/2.8L USM and EF 70-200mm f/2.8L USM, then changing lenses in between a hectic photo-call can be a real hassle. However, I did come across a situation where the was plenty of time to change between the EF 28-70mm f/2.8L USM and EF 70-200mm f/2.8L USM and forth during a photo-call - the beauty finalists were actually waiting for the photographers to get ready while I have already started shooting away for great candid pictures. It was during this 'getting ready' situation that I was able to change between the two EF zoom lenses with ease and still got the candid shots I wanted, as shown below. Shot at 100mm Shot at 70mm     Shot at 28mm Shot at 200mm Even in motorsports, like the World Motorcycling Championship series, getting the best angle can be a pretty daunting task, especially of the 500cc riders. It is much easier to shoot the 125cc and 250cc riders or even those competing in the World Superbike Championship but the 500cc class is a different matter altogether. With the 500cc class, what the photo schools have taught or the techniques that you have learnt when it comes to panning, the part which says to use slower shutter speeds goes out the window. Shooting with a shutter speed of 1/30 sec. with a 500mm or 600mm focal length on a 500cc rider traveling at speeds up to 320 km/hr just doesn't work with the panning technique most of the time - you need to be a regular GP racing shooter or own one of the IS super telephoto EF lenses to do so. From-the-back side view Side view in full     Close-up side-view Approaching viewpoint angle Text and photos by Philip Chong. Copyright 2000 by Canon Marketing (M) Sdn Bhd << Back to Main . 1 . 2 . 3 .