I have experimented with LCD clear film protectors on my cameras, and phones and have found bubbles form on the cheaper Walmart type purchases. A friend of mine gave me a complimentary clear film from Palm Inc. I could tell it was extremely high quality and went on my K20D perfectly - absolutely no bubbles. It's been on for 21/2 years now and I have not noticed any curling at the edges. Of course I had to cut it to size for the K20D LCD screen. I can see no deterioration of the image on the LCD whatsoever. Best of all it comes of very easily - no pulling force required - and can be stuck back again. I can positively recommend use of protective film. It has protected my LCD screen as I can see plenty of scratches on the film, so much so that I must replace it with a new one.
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