So, if you own both a computer and a camera, there’s a better than average chance you’ve encountered one of the many online gear forums, where people discuss camera equipment. And, while a lot of useful information can be learned from these forums, they also rival the Mos Eisley cantina for biggest dens of inequity going, and I’ve lurked on them long enough to notice there are several popular fallacies that seem to never go out of style, which is sad because they frequently stand in the way of better customer satisfaction.

So, we’re going to start addressing a few of these as a respected dealer of equipment, with all our insider knowledge and decades and decades of experience with camera equipment over the ages.

And first up is AF-S. AF-S is Nikon’s designation for lenses with an integral ultrasonic motor for focusing, introduced in 1996. Now, if you’re new to equipment, you may not know that auto-focus cameras used to use a body-based focus motor and screw drive system. Nikon’s AF-S comes under fire because starting with the D40, they started leaving a body-based motor out of their cameras, forcing users to buy AF-S lenses if they wanted autofocus. This gets decried a lot as a shameless attempt on Nikon’s part to force new lens sales and cut-off the used market. AF-S gets a lot of hate.

Of course, never mind that Canon switched entirely to in-lens focus motors when it created its EOS system and EF mount in 1987, making it’s entire FD line-up completely unusable with new cameras. Or that Olympus and Sony’s DSLR systems also use only in-lens AF systems. Or that in lens AF systems are faster, quieter, and more accurate. Obviously such technological improvements must be bad, right?

Simple answer: if you’re a new DSLR customer and can afford it, go AF-S. Even though the more expensive bodies still support the body-motor, in-lens focus motors have been the future for the past twenty years. They might cost you more than the old used ones, but they’ll continue to work going forward on all Nikon bodies. Plus, don’t forget that focus motors aren’t all that’s improved in the past twenty years: lens coatings, exotic lens elements like aspherical elements, and even basic lens formulas have all continued improving and the newer AF-S lenses will yield more than just a focus motor for your money.