 "Canon Eg-S Focusing Screen (Precision Matte)"@en " Miscellaneous Accessories | Unique Photo "@en
"- An Interchangeable Point of Focus focusing screen for the Canon EOS 5D Mark II Digital SLR"@en 
 "Canon EOS 6D (Body Only)"@en 6D"@en
 "The photo quality you get from the EOS 6D makes it well worth upgrade over a consumer APS-C model but between this and comparable or higher-end models it's less obvious choice."@en