The Seatool XTi housing is available in three viewfinder configurations, one of which is perfect for your shooting style:

Optical Window This window contains no magnification or reduction, so it benefits from the 25% underwater refractive magnification of the camera viewfinder. Only approximately 66% of the viewfinder is visible without adjusting the users eyepoint. Pickup Viewfinder This 0.8x Pickup Viewfinder is a reducing optic that allows corner to corner viewing of the camera viewfinder. The second component of the Pickup Viewfinder is a reducing optic that mounts to the camera viewfinder. Inon 45° Magnifying Viewfinder The 45° Inon Magnifying Viewfinder is great for keeping the photographer up off of the reef while shooting low angle macro subjects. The 45° Inon Magnifying Viewfinder can be rotated 360° which is useful for shooting in portrait orientation. Inon 180° Magnifying Viewfinder The 180° Inon Magnifying Viewfinder is coming soon, and will offer a magnified view in a traditional configuration.