Tokina SZX 400mm f/8 Reflex MF Review

So you're looking at the Tokina SZX 400mm f/8 Reflex lens for Canon RF. This is a weird one, and I mean that in the most interesting way. It's a catadioptric, or mirror, lens. That's the kind you see with that distinctive donut-shaped bokeh. For about $299, you get a super lightweight 400mm prime lens that's manual focus only and has a fixed f/8 aperture. People searching for 'cheap super telephoto lens' or 'mirror lens for Canon RF' will land here, and it definitely fits that bill. It's a full-frame lens, so it'll work on your R5 or R6, but it's also incredibly compact for the focal length, weighing just 355 grams. Just know going in: this isn't a general-purpose lens. It's a specific tool for a specific, often creative, job.

Let's talk numbers. The optical performance lands in the 3rd percentile, which is about as low as it gets. That's not a mistake. Mirror lenses are known for softer, lower-contrast images compared to traditional glass, and this one follows that rule. You're not buying this for clinical sharpness. The fixed f/8 aperture puts it in the 13th percentile for aperture and bokeh, so it's not great in low light and you get those signature donut-shaped highlights out of focus. Where it scores surprisingly well is build quality, in the 81st percentile. It feels solid and well-made for what it is. In practice, that means you'll need good light, a steady hand (or a tripod), and patience to nail manual focus at 400mm. It's good for distant, stationary subjects in bright sun.

At $299, the value proposition is simple: it's the cheapest way to get to 400mm on a Canon RF camera. You're trading optical performance, autofocus, and versatility for that low price and tiny size. If a sharp, modern telephoto zoom like the RF 100-400mm f/5.6-8 is in your budget, that's a much better all-around option. But if your budget is tight and you just want to experiment with a super-long focal length or that specific mirror lens look, this is basically your only RF-mount option.

This lens doesn't really compete with the standard zooms on your list, like the Sony 24-240mm. That's an all-in-one travel zoom. A better comparison is the RF 100-400mm f/5.6-8 IS USM. It's more expensive, but it has autofocus, image stabilization, a zoom range, and vastly better image quality. For the same 'unique optical character' niche, you could look at old, adapted manual focus lenses from film eras, but they won't be this small or native to RF mount. The Tokina SZX is in a category of one: native RF, super cheap, super light, super telephoto, with all the compromises that entails.

Should you buy the Tokina SZX 400mm f/8? Only if you know exactly what you're getting into. This is not a lens for shooting your kid's soccer game or wildlife in action. It's a manual focus, slow-aperture, soft lens. But, if you're a photographer who wants to play with extreme focal lengths on a budget, or you're chasing that specific dreamy, donut-bokeh aesthetic for creative projects, it's a fascinating and affordable tool. For literally any other use case, from portraits to travel to sports, there are dramatically better options, even at a slightly higher price. Buy this for the novelty and the challenge, not for performance.