I have been using the Varavon ProFinder for several months for the Canon 5DMKII, and this accessory makes my stills or video shooting on the DSRL more enjoyable and precise.The Varavon's ProFinder counts with a large viewfinder loupe and a comfortable eye-cup (on which you could fit an eye-cup chamois) and an adjustable diopter to suit your eye sight. At the same time it is a convertible waist finder with a non-ghosting mirror. The versatility of this viewfinder allows the shooter to photograph at shoulder level and also at low angles at waist level. The ProFinder is a pretty nifty and well constructed DSRL accessory. So far, it is the most practical and durable constructed non-electronic viewfinder/loupe for the DSRL market, leaving the many other accessories makers well behind.
The main body of the viewfinder has a durable sponge seal that blocks unnecessary light and protects the camera LCD back screen. It attaches to the camera via a solid machined aluminum Attachment Plate and screw/pin to fit the different DSRL models, like the 550D, 7D, and Nikon 7000, instead wobbly and unstable tapes or velcro, making it a very study part and parcel of the camera body. One of the many conveniences, I have found using the ProFinder is that the loupe is totally detachable and I can use then the main body of the viewfinder just like a sun covering matte box for the LCD screen under the two configurations, to shot over the shoulder or at waist level, all these at the flick of a Stop Free hinge to reveal the top or back hood at any angle.
