|The O-ME53 magnifying eyecup works with all PENTAX DSLR bodies offering 1.2 times magnification over the entire image field. This magnification is ideal for critical focusing and when using manual focus lenses.|
Customer Reviews of Pentax Magnifying Eyepiece O-ME53
Helps manual focus. Great Value at Buy.com11/28/2007
The magnification being 1.2x the enlargement of the viewfinder is very subtle but noticeable. It does help in manual focus a lot as well as gives a slightly enlarged viewfinder. Initially I was in a dilemma whether to keep this or return it but decided to keep it. For people with prescription glasses like me the viewfinder magnifier (expected of any magnifier) does restrict the whole view of the viewfinder, i.e. we have to move our eyes around to see the status information at the bottom of the viewfinder, however the image you are viewing in the viewfinder is clearly visible. If you feel this is a problem and can make do with removing your glasses while photographing or do not mind looking around the viewfinder for information this should not be an issue. For people without eye glasses this is not an issue as the whole viewfinder is clearly visible. I haven’t seen any pronounced vignetting with the magnifier as compared to a 2x (tried out my friends right angle viewfinder magnifier which has a 1.2x and 2x magnification) at 2x the vignette was very pronounced, seems like you are looking down a barrel and the information bar is not visible. As a side note, installing this magnifier was a snap, slide out the existing eyecup by pulling it up (you might have to wiggle it a bit) then slide this one back on and you are done! As a deal hunter myself I have found Buy.com has the best price around for this item.