Rokinon CINE DSX RK24MAF-N 24mm

A fast f/1.4 manual 24mm prime that delivers stunning astro images when you get a sharp copy. The problem is quality control is all over the place, and you might have to exchange it a few times. Buy it only if you're willing to roll the dice and you shoot manual everything.

Optically, a solid copy of this lens sits in the 88th percentile among all lenses we've analyzed. Stopped down to f/2.8 or f/4, it's bitingly sharp, and the ultra-fast f/1.4 pulls in enough light for clean Milky Way shots with minimal coma. That's the high point. The low points are everything else: manual focus only means you'll need a tripod and live view to nail critical focus, especially wide open where depth of field is paper-thin. The 8-blade diaphragm produces okay bokeh but nothing special, and with no stabilization you'll want a steady hand or a tripod for video. For wildlife or sports, forget it, the long minimum focus distance and lack of AF make it one of the worst choices in our database.

Stacked against modern mirrorless zooms like the Nikon Z 18-140mm or Canon RF-S 18-150mm, this Rokinon is a dinosaur. Those lenses offer autofocus, stabilization, and versatile focal ranges, but they can't touch f/1.4. For Pentax shooters specifically, the competition is sparse. The Sigma 10-18mm f/2.8 is an ultrawide zoom but for a different mount; Viltrox's AF 9mm f/2.8 gives autofocus but at a much wider focal length. So the Rokinon sits in a weird niche: a fast 24mm prime that forces you into manual everything, making it a poor choice for generalist shooters but a potential lifesaver for astrophotographers on a budget who don't mind the hassle.

Pricing is all over the map, which is typical for this lens. You'll find it anywhere from $379 to $680 across different retailers. If you can snag a fresh copy near the lower end, it's a genuine steal for the sheer light-gathering ability. But that value proposition crumbles if you pay top dollar and then have to fight with returns. For Pentax users without many affordable wide-angle options, this is still a pragmatic buy, just be ready to test the lens immediately and return it if the stars look smeared.

The Rokinon 24mm f/1.4 is a fully manual wide-angle prime that punches way above its price for astrophotography and low-light work. It gives you an 84-degree field of view on full-frame and a crazy fast f/1.4 aperture, along with 13 glass elements that include aspherical and ED types to keep things sharp. But make no mistake, this isn't your everyday walkaround lens. There's no autofocus, no stabilization, and the build feels cheap. On paper, it's a specialist tool that can produce stunning images if you're willing to work for them.

The bigger catch is quality control. Our user sentiment data and dozens of owner reports highlight a frustrating reality: getting a good copy is a gamble. Many buyers had to exchange the lens multiple times before landing one that was truly sharp and free of coma. So while the optical formula is impressive in theory, you might need some patience to unlock it. For Pentax shooters especially, there aren't many modern fast 24mm options, making this lens tempting despite its flaws.

If you need autofocus for events, sports, or fast-paced video, look elsewhere immediately. Also skip this if you're not prepared to potentially open and return several boxes. The lottery on decentering and infinity focus alignment isn't for the faint of heart. Buy a modern zoom with stabilization if you want a stress-free wide-angle experience.

This lens is for astrophotographers, budget-conscious night-scapers, and Pentax diehards who can stomach a hands-on, manual workflow. If you're patient enough to possibly swap a dud copy, you'll end up with a fast, sharp 24mm that thrives under the stars. For anyone else who needs autofocus for events, video, or quick snaps, just skip it. The inconsistency alone makes it a tough recommendation for casual users.