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EF17-40mm f/4L USM Specifications
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Specifications for the EF 17-40 f/4L USM The EF17-40mm f/4L USM utilizes a combination of one high-precision molded glass aspherical lens and two replica aspherical lenses to achieve the extended zoom range, while also correcting for a variety of aberrations that arise during zooming. Moreover, a Super UD (ultra-low dispersion) glass element minimizes the chromatic aberration of magnification that tends to occur with wide-angle lenses, eliminating color bleed along the edges of the subject and realizing high image contrast and resolution.
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EF : How to unload a roll of film.
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Avoid direct sunlight when unloading the film Keep your exposed cartridges in a cool dray and shady place and have them processed as soon as possible Do not leave the same roll of film in your camera for months on end, since black and white film may become fogged and color film may experience a definite color -shift
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Using drop-in filters on the EF 600mm f/4L IS III USM lens
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Drop-In Filters The 52/52(WII)-series drop-in filters can also be used. However, their exterior color is different than the lens body.
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Using drop-in filters on the EF 400mm f/2.8L IS III USM lens
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Drop-In Filters The 52/52(WII)-series drop-in filters can also be used. However, their exterior color is different than the lens body.
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EF-S60mm f/2.8 Macro USM Specifications
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EF-S60mm f/2.8 Macro USM As a result, users need not worry about the front of the lens touching the subject when shooting macro photos. The EF-S60mm f/2.8 Macro USM's lens element positioning and lens coating have been optimized to ensure excellent color balance while minimizing the flare and ghosting that can easily occur when the lens is used with a digital camera.
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