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I have also read about the inability or unwillingness for Canon to release a 64bit CODEC for their RAW files. I now own a Canon EOS Rebel T5.
Easily sort, organize and view photos. Save time with an ultra-fast workflow. Edit and perfect one or thousands of photos. Fedora®19 or Ubuntu® 14.04 or later (64-bit distributions). 64-bit Intel or AMD processor (multi-core processor recommended). 2 GB of RAM. 250 MB of available hard disk space required.
Canon Rebel Raw Setting
1024 x 768 resolution with 16-bit color. Internet connection required for online help and program updates. Dependencies: Glib 2.4, KDE or GNOME recommended (full list of dependencies in RPM & DEB packages). Enable desktop compositing and freedesktop.org-compliant window manager (KDE, Gnome, and others) recommended.
64-bit distributions require 32-bit compatibility libraries (ia32-libs) Image formats.