minimum focal length. 300mm. 400mm. A shorter minimum focal length allows you to get more of the scene in the photo, and offers a wider angle of view than longer focal lengths. has built-in optical image stabilization. Canon EF 300mm F2.8L IS II USM. Canon EF 400mm F/2.8L IS II USM. Optical image stabilization uses gyroscopic sensors to detect The Canon EF 300mm F2.8L IS II USM is an updated version of an earlier design, and is designed for use with Canon's full-frame and APS-C DSLRs. Featuring a completely new optical design and lighter weight construction, this weather-sealed lens is built for hard, professional use.

Ken Rockwell's review of the EF 300mm f/2.8L USM lens. MIR.com web page devoted to EF 200mm f/1.8L USM lens, with good illustration of similar controls (scroll down). Canon USA Support: Using EF 400mm f/2.8L USM Focus Preset Function. Scribd PDF of EF 500mm f/4.5L USM lens manual (preview only, account and download req'd).

To summarize: The 300mm f/2.8 weighs 5.6 lbs (2550g), costs $5500 in the UK, and with a 2x Extender produces an effective focal length of 960mm at. f/5.6 on a 40D. The 500mm f/4 weighs 8.5 lbs (3870g), costs $8250 in the UK, and with a 1.4x Extender produces an effective focal length of 1120mm at. f/5.6 on a 40D.

A worthy successor to the popular Canon EF 300mm f/2.8 IS, the all new Canon EF 300mm f/2.8 IS II USM super telephoto lens is lightweight, weighing approximately 8% less than its predecessor, yet offers faster operation, improved image stabilization and superior optics.
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The fluorite element and two UD-glass elements result in high resolution and high contrast. The ring USM and an improved AF drive algorithm make the AF speed the fastest in the world when used with the EOS-1v and EOS-3. This lens has the same AF stop and focus preset features as the EF 300mm f/2.8L IS USM. Thank you for purchasing a Canon USM lens. The Canon EF 70-200mm f/2.8L IS USM is a Features high-performance, telephoto zoom lens 1. The four UD elements help capture very sharp dedicated to Canon EOS cameras. It is equipped and clear pictures with outstanding image with an Image Stabilizer to help preventing blurred delineation.
Cloudy Nights. Imaging: Canon 300L f/2.8 vs 300L f/4 - posted in Refractors : Hi I’ve been doing my research and it seems the original v1 copies of these two lenses (without image stabilization) are excellent for astrophotography, with full frame sensors. An issue with the 300 2.8 is that the focus will only work with an EOS body attached
That said, it is an ideal lens for anyone who does much low light photography. In summary, the positive points of the Canon EF-S 17-55mm f/2.8 IS USM are: Good build quality with smooth operations
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    • canon ef 300mm f 2.8 l is ii usm review