Sirui Astra AST-75-ZN

The Sirui Astra 75mm T1.8 brings full-frame anamorphic video to Nikon Z with autofocus and neutral streak flares. It's a solid choice for budget-conscious filmmakers who want the cinematic wide look without cropping. Sharpness is good, build is average, and bokeh isn't the smoothest, but at the right price it's a creative steal.

If you've been hunting for an affordable full-frame anamorphic lens for your Nikon Z camera, the Sirui Astra 75mm T1.8 probably popped up on your radar. It's a 1.33x squeeze lens that gives you that wide 2.4:1 cinematic aspect ratio without any cropping, and it does it with autofocus, which is still rare in the anamorphic world. The neutral streak flares and oval bokeh are exactly what indie filmmakers and hybrid shooters look for when they want that big-screen look without renting a multi-thousand-dollar cinema set.

At around $849 to $1,156, the Astra sits in a sweet spot for anamorphic glass. It's not dirt cheap, but you get a fast T1.8 aperture, a 13-blade diaphragm for smooth out-of-focus highlights, and full-frame coverage with a generous 44mm image circle. The lens is relatively compact at 1.5 pounds, and the 67mm filter thread means you can use standard accessories. We'll dig into how it actually handles in our performance section.

Optically, this lens holds up well. Our database ranks its performance in the 70th percentile overall, which for an anamorphic lens is solid. Sharpness is decent across the frame, especially stopped down a bit, though you'll see some softness and chromatic aberration wide open at T1.8. That's pretty standard for anamorphic glass at this price, and most subjects look crisp enough for 4K video.

The autofocus is functional but not snappy. It lands smack in the middle of our rankings, around the 54th percentile. In bright light it's reliable, but in dim conditions it hunts a little. For critical video work, you'll probably switch to manual focus anyway, and the focus ring is decently damped. Bokeh fans, keep expectations in check. The 13-blade diaphragm delivers oval bokeh, but the rendering quality is below average, landing in the 38th percentile. Out-of-focus areas can look a bit nervous, and highlights aren't as smooth as on higher-end anamorphics.

Build quality is another area where Sirui cut corners. The body feels plasticky, and there's no weather sealing, which explains its 36th percentile ranking. It's lightweight, sure, but it doesn't inspire confidence on a rough set. There's no stabilization either, so handheld video needs extra support. The T1.8 aperture is bright for the category, but overall aperture performance sits at just the 19th percentile. That's less a dig on speed and more a reflection of how it compares to lenses with more blades or more circular openings. Still, for an anamorphic, T1.8 is plenty fast for low light and shallow depth-of-field work.

Anamorphic lenses have always been expensive, so seeing autofocus and full-frame coverage for under $1,200 is a big deal. Prices bounce around from $849 to $1,156, so you can save a hefty $300 by shopping around. If you score it near the low end, the value is hard to beat for Nikon Z shooters who need that widescreen look. That said, at the top of the price range you might consider the Sirui Saturn 75mm T2.9, which is manual-only but sharper and better built, or even the Viltrox 75mm f/1.8 if you don't need the anamorphic character.

The most obvious alternative is Sirui's own Saturn 75mm T2.9 anamorphic. It's fully manual focus, slower, but delivers sharper optics and a sturdier build, often for less than $900. If autofocus isn't a must, the Saturn is a wiser buy. The Viltrox AF 75mm f/1.8 is a straight-up photo and video prime that's twice as sharp and half the price, but of course you lose the anamorphic squeeze and flares. For pure image quality, the Nikon Z 85mm f/1.8 S outclasses both in sharpness and bokeh, but it won't give you that cinematic aspect ratio. And the usual suspects in our database like the Nikon Z 18-140mm are all-rounder zooms that can't even dream of anamorphic character. If video is your main gig, the Astra plays a completely different game.

Skip the Astra if you shoot in rough conditions. With no weather sealing and a plastic-heavy build, it's not cut out for rainy shoots or dusty environments. Photographers who prioritize edge-to-edge sharpness and buttery bokeh should look at a dedicated portrait prime like the Nikon Z 85mm f/1.8 S. And if you need a lens that can do everything from travel to telephoto, this isn't it. A standard zoom covers way more ground.

Should you buy the Sirui Astra 75mm T1.8? If you're a Nikon Z shooter who wants real anamorphic video without breaking the bank, this lens delivers. The autofocus is a handy bonus, and the neutral flares look clean and modern. It's not perfect: build quality leaves something to be desired, and you'll need to work around the mediocre bokeh and occasional focus hunting. But for the indie filmmaker, music video director, or hybrid shooter, it's a creative tool that opens up a lot of possibilities. If you're mostly a photographer, skip it. This lens is all about video.