Vivitar 58mm

A $17 screw-on telephoto attachment that's more toy than tool. Fun for experiments, rough for actual photos.

The optical score is rough, landing near the bottom of the barrel. You'll get soft edges, some color fringing, and a noticeable hit to sharpness. It's also not stabilized, and since it screws onto your existing lens, any shake gets magnified. The one bright spot is build quality, which is surprisingly decent for the price. But decent build doesn't fix mediocre glass.

Stacked against the GoPro HB-Series AEWAL-001 or the FotoZ KZ-03, the Vivitar feels like a toy. Those competitors are actual lenses with real mounts and real aperture control. The Altura Photo UM2267 and Lightdow 4358 also offer better optical performance for not much more cash. The Vivitar's only edge is price and the fact that it works with any 58mm filter thread lens you already own.

At $17, it's hard to call this a ripoff. But it's also hard to call it a good deal. You're buying a fun toy, not a serious tool. If you want to mess around with telephoto framing on a budget, fine. If you want actual image quality, save your money.

The Vivitar VIV-58T-BB is a screw-on telephoto attachment, not a real lens. It threads onto the front of whatever 58mm filter thread lens you already own and gives you a narrower view. For 17 bucks, it's a cheap experiment, but our scores say it's mostly a novelty. The bokeh and aperture percentiles look amazing until you realize this thing has no actual aperture control. It's just glass in a tube.

If you're looking for sharp portraits or any kind of professional work, this isn't it. Go grab a used 85mm prime or even a cheap vintage 135mm with an adapter instead. You'll get actual image quality for not much more money.

Skip it unless you're just curious. The Vivitar VIV-58T-BB is a cheap way to play with telephoto framing, but the image quality hit is real. You're better off saving up for a used prime or even a decent vintage lens with an adapter.