Canon EOS 1D Mark III User Guide - Page 43

EOS-1D Mark III EOS-1D Mark II N Major Viewfinder Specifications Item EOS-1D Mark III EOS-1D Mark II N Coverage [Approx. %] 100 Magnification 0.76 0.72 Viewing angle [°] 30 28.2 Eye point [Approx. mm] 20 Dioptric adjustment [dpt] -3 - +1 SI mirror Metering sensor SI lens 2 Metering lens Pentaprism Condenser lens Laser Matte surface Focusing screen 45 main reflex mirror Viewfinder Optics SI lens 1 SI-LCD LED emitting lens SI-LED Eyepiece lens 4 Eyepiece lens 3 Eyepiece lens 1 Eyepiece lens 2 SI dichroic mirror The basic configuration and performance of the SI (superimposed) display optics are the same as those of the EOS-1D Mark II N. However, to match the improved eyepiece optics, the SI LCD and SI lens 2 have been changed. SI lens 2 SI lens 1 SI LCD LED emitting lens SI LED Dichroic mirror The Ec-C IV focusing screen is a Laser Matte unit whose molding method has been improved over the previous Ec-C III focusing screen's. It makes it easier to focus and provides natural-looking background blur (bokeh). It is also brighter and less grainy, making it a very well-balanced focusing screen. With the improved molding method, image transfer is better. The dispersion characteristic is improved, and the screen is brighter with minimal flare. The fresnel lens area is especially improved for image transfer, increasing the peripheral brightness and making the screen look clearer overall. Compared to the EOS-1D Mark II N's Ec-C III standard focusing screen, the Ec-C IV is brighter, less grainy, and better balanced. The EOS-1D Mark III is compatible with all Ec focusing screens used by EOS-1 series cameras. Since the eyepiece frame now has a different shape to accommo- date the bigger eyepiece lens, viewfinder accessories dedicated to the EOS-1D Mark III have been developed at the same time: Eyecup Eg, Dioptric Adjustment Lenses Eg (7 types: -4, -3, -2, 0, +1, +2, +3), and Anti-fog Eyepiece Eg. Note that the old EOS-1 Eyecup Eg viewfinder accessories Eyecup Ec-II, Rubber Frame Ec, and Anti-fog Eyepiece Ec are not interchangeable with the Eg-series accessories. The newly-developed, standard Eyecup Eg has an improved mount for attaching it to the eyepiece. It is now less prone to detach inadvertently compared to the old eyecup. IX. CONTROLS AND DISPLAY 43