Similarly, using the EF 50mm f/1.0L USM in outdoor situations during daytime with bright sunlight or open shade conditions, the results are indiscernible from those shot using other EF lenses, due to the middle apertures used. However, there is one aspect that is not possible with other lenses - shoot at 1/8000 sec. at f/1.0 with ISO 50 film for shallower depth-of-field in daytime conditions, as shown in the second photo (top, on the right) below. Not much difference for daytime shooting Unless you are shooting the scene at the f/1.0 setting Close-up shot under open shade Shadow and highlight details rendered well here The 1994 Malaysian Motorcycling Grand Prix was the only time that I actually used the EF 50mm f/1.0L USM for the pit-lane action shots. At that time, the other lenses I have were the EF 20-35mm f/2.8L AFD, EF 80-200mm f/2.8L AFD and the EF 300mm f/2.8L USM. The EF 80-200mm has a narrower viewpoint while the EF 20-35mm was too wide for certain shots on the pit-lane. The 50mm lens provided just the right balance for those situations. Mick Doohan in his 1994 HRC leathers Alex Criville's 1994 NSR500 GP bike Now the question is: Is it worth to invest in the EF 50mm f/1.0L USM standard lens? If the price is not a problem, why not? If price is a factor, you should seriously consider your options before buying one. The price of this 50mm lens can buy two units of the EF 100-400mm f/3.5-5.6 IS USM zoom lens. Or both the EF 28-70mm f/2.8L USM and EF 70-200mm f/2.8L USM zoom lenses. Which of the EF lenses would you prefer to buy, now? Text and photos by Philip Chong. Photos copyright 1992, 1993 and 1994. Article copyright 1999 by Canon Marketing (M) Sdn Bhd << Back to Main . 1 . 2 . 3 . 4 .