Just like with any 2x teleconverter, the focal length of the attached lens is doubled, with a consequent aperture reduction of two f/stops. As such, a 70-200mm f/2.8 zoom effectively becomes roughly a ...
Canon's two new EF extenders are direct replacements of the current extenders offered by Canon as essential accessories for professionals. These new extenders have been designed to provide faster ...
As a 1.4x teleconverter, the focal length of the attached lens is magnified by a factor of 1.4x, with a 1 f/stop reduction in aperture rating, so a 70-200mm f/2.8 zoom effectively becomes roughly a ...
Photo Review Tech Editor Margaret Brown looks into the benefits and consequences of using focal length extenders. Teleconverters are popular with birders because they provide an affordable ““ and ...
Canon has introduced the newest member in its HDgc Series of portable HD zoom lenses. The new KJ20x8.2B IRSD portable HD lens is specifically designed to support low-cost image acquisition systems for ...
Digital Camera World on MSN
There’s a reason why you can’t put a teleconverter on a cheap lens
Most teleconverters have an element that protrudes making them incompatible with many 'cheap' lenses. Here's ...
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