Should you or shouldn't you use lens filters to protect lenses

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.

Some photography gear is a waste of money

Often photography equipment, especially a DSLR with lenses, many travelers purchase to capture high quality memories of their treks, isn't inexpensive.

Sometimes, after spending substantial cash to purchase equipment some photographers try to conserve their remaining expendable photo gear money by augmenting that gear with “inexpensive” (read that “cheap”) gear. More often than not, when that occurs, some purchases turn out to be a waste of money.

In my early years of purchasing photo equipment, before I knew what I was doing, I goofed purchasing camera bags which didn't last or meet my needs, tripods which didn't hold my camera/lens steady, and filters which diminished my image quality.

I've got a list of some of the classic purchase errors photographers sometimes make to save some money. Unfortunately, in the long run, these purchases are too expensive, because they either need quick replacement with better gear, or are permanently relegated to a drawer or closet

Protecting your lenses while traveling

Immediately when purchasing it, most everyone considers protecting their camera for travel and home. Typically, everyone purchases a camera case or bag to haul it around. Some travelers purchase a camera strap with a steel cable in it to prevent slash and grab thefts.

The same travelers rarely think about protecting their SLR or DSLR lenses from being damaged, which when you think about it, makes little sense.

SLR and DSLR users generally own at least two lenses for their camera, and often have more. Looking at many vacationers' stable of lenses, I often see a wide angle zoom, a normal-telephoto zoom, and often a fast prime lens. Sometimes they also own a macro or telephoto lens.

If you add up the cost of the lenses, even when they own just two, they will equal or more likely exceed the value of their camera.

I was in Paris a few years ago. I went to the Eiffel Tower one evening to take night photos. The crowd at the tower was huge. After finishing we walked back to the Metro to return to our hotel along with many who had visited the Tower that evening. The neighborhood is filled with row homes having front steps with metal railings.

Along the way I was accidental pushed into one of those railings by the crowd. The front of my lens hit the railing. Despite the lens cap on the lens, the UV filter atop the lens was smashed.

Do filters for digital cameras make sense?

Before the advent of high quality digital cameras, professionals, and advanced amateur film photographers traditionally used filters to modify both the color and intensity of light exposing the film, as well as to generate special effects.

Digital cameras operate in a different world with respect to color. Photographers can easily modify color in their cameras, or during post processing in their computers, via controlling white balance for scene color accuracy or effect.

Warming, cooling, and filters which convert fluorescent light to look like daylight, may be required for film, but digital cameras can achieve the same effects by their internal manipulation of the image’s digital data.

The use of traditional photography filters for modifying the color of the light, is unnecessary for digital photography, but other filters can work well for digital photography.