Q: I am buying a mirrorless camera and plan to use it primarily for moviemaking. Since I will mostly be making movies, how important do you think it is that I get a "power zoom" that zooms smoothly via a motor, rather than a mechanical zoom where turning the ring zooms the lens?

A: I don't think a power zoom is important at all. Frequent zooming in and out while recording is considered bad technique and can be very distracting to the viewer. If you watch motion pictures and professionally produced television shows, you will see very little zooming in and out.

When perspective changes, it is often because the camera is moved, and effects like the so-called "Ken Burns effect" — panning and zooming across still images — are easily created in software. The most notable exception I can think of is recording sports, when zooming while recording becomes more necessary.

Looking back to a 10-minute short film I produced last year, I used prime lenses (non-zoom lenses with a single focal length, like 25mm) for almost everything. I used a zoom for one scene. It was zoomed out to 300mm and left there.

I do suggest that you get a good microphone. Make sure whatever camera you buy has a microphone input, and hopefully audio level controls, too. A good microphone to start with is the $149 Audio-Technica PRO 24-CM, which includes a windscreen and conveniently mounts on the camera shoe.

Product update

In early January, I attended the annual Consumer Electronics Show in Las Vegas. I saw some great new products there and am eager to tell readers about them, starting this week.

The first product is ThinOPTICS reading glasses. I wear contact lenses and use reading glasses at times, especially for fine print or when reading for an extended period. Like many others, I sometimes misplace my glasses at home or forget to bring them when I go out. It is easy to forget about them because my contact lenses serve me well 95 percent of the time. I usually end up regretting it whenever I forget them, sometimes to the point that I find a drugstore and buy another pair rather than go without.

ThinOPTICS reading glasses are so thin and flexible you can put them in your wallet or attach them to your cellphone case. As ThinOPTICS says, they are "as thin as two credit cards and as light as a nickel."

The small size, light weight and flexibility don't count for much if they don't work well. I was surprised at what great glasses they are. Their "Flex-Grip Technology" keeps them firmly and comfortably in place, and the optics are sharp, clear and free of distortion.

ThinOPTICS reading glasses are available in strengths from +1.50 to + 2.50 and start at $19.95 for the glasses alone. A $24.95 package combines the glasses and a universal pod (a thin envelope) that can be attached to a cellphone case or placed in your wallet, pocket or purse. For $38.95 you get the glasses and a Samsung or iPhone cellphone case with integrated ThinOPTICS glasses compartment. ThinOPTICS provides a 30-day satisfaction guarantee and "free replacement glasses forever" if your glasses fail under normal use. See them at thinoptics.com.

Send questions to Don Lindich at donlindich@gmail.com. Get recommendations and read past columns at soundadvicenews.com.