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CMS-XML Control Ring Click Modification for RF lenses and EF->RF Control Ring
Control Ring Click Modification for RF lenses and EF-> RF Control Ring
PDF EOS R SYSTEM MOUNT ADAPTERS BATTERY GRIP
Lens Type Canon RF Lens Focal Length & Maximum Aperture 28–70mm, f/ 2 Lens Construction 19 elements in 13 groups Diagonal Angle of View 75°00’-34°00’ Focus Adjustment Ring USM Minimum Focusing Distance 1.28ft./0.39m Aperture Blades 9 blades Filter Size 95mm Maximum Diameter & Length 4.09 x 5.50 in. / 103.8 x 139.8mm Weight Approx. 50.4 oz. / 1430g
CMS-XML Compatible Cameras and Lenses for the Function of Correcting Lens Aberration with Digital Photo Professional Ver.3.11
Compatible Cameras and Lenses for the Function of Correcting Lens Aberration with Digital Photo Professional Ver.3.11 ID : 8201408100 _ EN _ 2 Solution Compatible Cameras
CMS-XML Cameras and Lenses Compatible with the Digital Lens Optimizer feature (Digital Photo Professional Ver.3.14.40) (EOS 7D Mark II)
Cameras and Lenses Compatible with the Digital Lens Optimizer feature (Digital Photo Professional Ver.3.14.40) (EOS 7D Mark II) ID : 8202232600 _ EN _ 2 Solution Cameras compatible with the Digital Lens Optimizer feature
CMS-XML Proof of Purchase Guidance
1. Retailer name 2 . Retailer address or store # 3. Date purchased
CMS-XML Definition of F-number
F-number For the numbers, a sequence of numbers which use the square root as the common ratio based on 1 (one) is used. The aperture scale consists of approximate values which are two times as great as or half of the basic number of the amount of light that passes the lens by each step (1.0, 1.4, 2 , 2.8 and so on). However, the maximum F-number may not be appropriate to this sequence of numbers.
CMS-XML How to Read an MTF Chart
Canon's MTF charts give results at two apertures: wide-open, and stopped down to f/8, with the lens set to infinity focus. While MTF charts don't include many factors that can be important when selecting a lens (size, cost, handling, closest focusing distances, AF speed, linear distortion, evenness of illumination, and of course features like Image Stabilization which may produce superior real-world results), they can indicate to the knowledgeable reviewer some of the optical characteristics they can expect from a particular lens.