It's a question that's been around almost since the first truly portable camera. Should you or shouldn't use lens filters to protect your lenses. Generally, the question is viewed in black and white, but I think it's more complicated, more nuanced than most photographers care to admit.The argument against using lens filters for lens protection is that when you put any extra optical glass between your lens and film or digital sensor, it's likely to degrade your camera/lens IQ (image quality). Yet photographers compromise image quality regularly for all sorts of reasons. For example, to increase the reach of a lens many photographers regularly use teleconverters that most definitely diminish lens IQ.
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