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Canon EF 90-300mm f4.5-5.6 USM
Technical Specifications
Angle of view (horzntl, vertl, diagnl): 22°40' - 6°50', 15°10' - 4°35, 27° - 8°15'
Lens construction (elements/groups) :13-9
No. of diaphragm blades :7
Minimum aperture:38 - 45
Closest focusing distance (m):1.5
Maximum magnification (x):0.25 (at 300)
AF actuator :Micro USM
Filter diameter (mm):58
Max. diameter x length (mm):71 x 114.7
Weight (g):420
Magnification with optional Extension Tube EF12 II:0.20 - 0.13
Magnification with optional Extension Tube EF25 II :0.36 - 0.29
Hard case:N/A
G.F.Holder III (hood III*) :-5
G.F.Holder IV (hood IV*) :-4
Main Features
• Compact size and low weight telephoto zoom lens
• One of the lenses with the fastest AF speed in its class
• Circular aperture at wide settings
• Exterior design matches the style of other EOS models
• Environmentally-friendly lead-free glass used
A good general purpose lens as with the EF 90-300 mm f/4,5-5,6 but including a USM
The optics of the EF 90-300mm f/4.5-5.6 USM are based on those of the EF 75-300mm f/4-5.6 III USM and the optical performance is similar. However, the AF drive pattern has been optimized for the EOS 300V, giving a faster AF speed. The communication speed between the lens and the camera is faster due to a new high-speed CPU. Also, a new AF algorithm has been developed. All the lens elements are manufactured from environmentally-friendly lead-free glass. A redesigned electromagnetic diaphragm (EMD) provides an aperture which is nearly circular at the widest settings. This gives an improved out-of-focus background effect. This lens features a micro USM (Ultrasonic Motor) motor which operates almost noiseless.