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CMS-XML Information on the EF II extension tubes.
The Extension Tubes EF12 II / EF25 II are close-up photography accessories for EF lenses that are mounted on the rear of the lenses. While inheriting the basic specifications such as tube length from the EF12/EF25, the EF12 II / EF25 II have a larger inside diameter than previous models so that it can be attached to EF- S lenses.
CMS-XML How to Read an MTF Chart
Fine repeating line sets are created parallel to a diagonal line running from corner to corner of the 35mm frame, directly through the exact center of the image area. These are called sagittal lines, sometimes designated " S " on Canon's MTF charts. At a 90° angle to these, additional sets of repeating lines are drawn, called Meridional (or "M") line sets.
CMS-XML Cameras and Lenses Compatible with the Digital Lens Optimizer feature (Digital Photo Professional Ver.3.14.40) (EOS 7D Mark II)
EF- S lenses EF-S 60mm f/2.8 Macro USM EF-S 10-18mm f/4.5-5.6 IS STM
CMS-XML Compatible Cameras and Lenses for the Function of Correcting Lens Aberration with Digital Photo Professional Ver.3.10
EF- S lenses EF-S 60mm F2.8 Macro USM EF-S 10-22mm F3.5-4.5 USM
CMS-XML Compatible Cameras and Lenses for the Function of Correcting Lens Aberration with Digital Photo Professional Ver.3.11
EF- S lenses EF-S 60mm F/2.8 Macro USM EF-S 10-22mm F/3.5-4.5 USM
CMS-XML Compatible Cameras and Lenses for the Function of Correcting Lens Aberration with Digital Photo Professional Ver.3.12.40 (EOS M)
EF- S lenses EF-S 60mm f/2.8 Macro USM EF-S 10-22mm f/3.5-4.5 USM
CMS-XML Cameras and Lenses Compatible with the Lens Aberration Correction Function of Digital Photo Professional Ver.4.2.10
EF- S lenses EF-S 60mm f/2.8 Macro USM EF-S 10-18mm f/4.5-5.6 IS STM