In the fourth part of my Camera Nitty Gritty series, I examine how much (if any) difference a branded lens makes to the camera in a phone. With example photos from the Nokia N93, E90, N82 and N95, and from the Samsung G810 and i8510 and HTC Touch Pro, I try to demonstrate the variations in photo quality for a given megapixel count. What other factors play a part here and is it worth making branded optics a 'must have' item on your phone shopping list?

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