DocFrankenstein
1st of September 2004 (Wed), 12:11
17-40 L
http://www.bhphotovideo.com/images/largeimages/279582.jpg
While this is an excellent ultra-wide zoom lens for analogue (film) SLR cameras, this lens is especially well suited for digital SLR cameras which usually have an imaging sensor size smaller than the 35mm format. When used with such digital SLR cameras these focal lengths can give an angle of view approximately equivalent to that of a 28-70mm lens used on a 35mm camera, which makes it the ideal standard zoom lens.
All of the "L" lenses deliver optical performance equal to similiar fixed focal length lenses, and the USM lenses do this with silent, high-speed focusing. Distortions and aberrations are remarkably small for a lens of such amazing capabilities.
Key Features
• Rear gelatin filter slot accepts up to three gel filters, allowing for a multitude of different combinations
• Lens retains the popular 77mm filter size shared by other Canon "L" zoom lenses
• Lens uses three aspheric elements of two different types, while Super UD (Ultra-low Dispersion) glass is used to prevent the chromatic aberrations that often can degrade the subject edge clarity
• Entirely internal focusing and zooming movement
• Dust and moisture resistance is equal to the professional levels of the EOS 1-V and 1-D cameras
• Circular aperture diaphragm produces brilliant out-of-focus characteristics
Filter Size 77mm (gelatin filter slot on the rear of lens accepts up to three gel filters)
f/Stop Range 4-22
Minimum Focus Distance 11" (28 cm)
Magnification 1:4
Zoom/Focus Control Two-touch
Angle of View 104-57°
Groups/Elements 9/12
Length 3.8" (97mm)
Maximum Diameter 3.3" (83.5mm)
Weight 17.5 oz (500g)
http://www.bhphotovideo.com/images/largeimages/239648.jpg
Developed for the demands of digital photographers, the EF 16-35mm f/2.8L USM wideangle improves on its predecessor with a shorter beginning focal length, better close focusing capability & improved peripheral brightness in the image corners. All of the "L" lenses deliver optical performance equal to similiar fixed focal lengths lenses, and the USM lenses do this with silent, high-speed focusing. Distortions and aberrations are remarkably small for a lens of such amazing capabilities.
Key Features
• Rear gelatin filter slot
• Lens retains the popular 77mm filter size shared by other Canon "L" zoom lenses
• Better close focusing than the 17-35mm f/2.8 "L" predecessor
• Entirely internal focusing and zooming movement
• Dust and moisture resistance is equal to the levels of the EOS 1-V and 1-D cameras
• Circular aperture diaphragm produces brilliant out-of-focus characteristics
Filter Size 77mm (gelatin filter slot on the rear of lens)
f/Stop Range 2.8-22
Minimum Focus Distance 0.9'
Magnification 1:4.5
Zoom/Focus Control Two-touch
Angle of View 108-63°
Groups/Elements 10/14
Length 4.0"
Maximum Diameter 3.3"
Weight 1.32 lb
http://www.bhphotovideo.com/images/largeimages/279582.jpg
While this is an excellent ultra-wide zoom lens for analogue (film) SLR cameras, this lens is especially well suited for digital SLR cameras which usually have an imaging sensor size smaller than the 35mm format. When used with such digital SLR cameras these focal lengths can give an angle of view approximately equivalent to that of a 28-70mm lens used on a 35mm camera, which makes it the ideal standard zoom lens.
All of the "L" lenses deliver optical performance equal to similiar fixed focal length lenses, and the USM lenses do this with silent, high-speed focusing. Distortions and aberrations are remarkably small for a lens of such amazing capabilities.
Key Features
• Rear gelatin filter slot accepts up to three gel filters, allowing for a multitude of different combinations
• Lens retains the popular 77mm filter size shared by other Canon "L" zoom lenses
• Lens uses three aspheric elements of two different types, while Super UD (Ultra-low Dispersion) glass is used to prevent the chromatic aberrations that often can degrade the subject edge clarity
• Entirely internal focusing and zooming movement
• Dust and moisture resistance is equal to the professional levels of the EOS 1-V and 1-D cameras
• Circular aperture diaphragm produces brilliant out-of-focus characteristics
Filter Size 77mm (gelatin filter slot on the rear of lens accepts up to three gel filters)
f/Stop Range 4-22
Minimum Focus Distance 11" (28 cm)
Magnification 1:4
Zoom/Focus Control Two-touch
Angle of View 104-57°
Groups/Elements 9/12
Length 3.8" (97mm)
Maximum Diameter 3.3" (83.5mm)
Weight 17.5 oz (500g)
http://www.bhphotovideo.com/images/largeimages/239648.jpg
Developed for the demands of digital photographers, the EF 16-35mm f/2.8L USM wideangle improves on its predecessor with a shorter beginning focal length, better close focusing capability & improved peripheral brightness in the image corners. All of the "L" lenses deliver optical performance equal to similiar fixed focal lengths lenses, and the USM lenses do this with silent, high-speed focusing. Distortions and aberrations are remarkably small for a lens of such amazing capabilities.
Key Features
• Rear gelatin filter slot
• Lens retains the popular 77mm filter size shared by other Canon "L" zoom lenses
• Better close focusing than the 17-35mm f/2.8 "L" predecessor
• Entirely internal focusing and zooming movement
• Dust and moisture resistance is equal to the levels of the EOS 1-V and 1-D cameras
• Circular aperture diaphragm produces brilliant out-of-focus characteristics
Filter Size 77mm (gelatin filter slot on the rear of lens)
f/Stop Range 2.8-22
Minimum Focus Distance 0.9'
Magnification 1:4.5
Zoom/Focus Control Two-touch
Angle of View 108-63°
Groups/Elements 10/14
Length 4.0"
Maximum Diameter 3.3"
Weight 1.32 lb