Sigma Sigma 28-105mm T3 FF Cine Zoom Lens with AF Review

The Sigma 28-105mm T3 FF Cine Zoom Lens is a sharp, versatile L-mount zoom for filmmakers. It offers a useful focal range, cine features like T-stops, and the rare bonus of autofocus. It's heavy and not the fastest lens, but it's a great all-in-one solution for solo shooters.

If you're a filmmaker or serious video shooter looking for a single L-mount zoom lens that can handle a lot of your work, the Sigma 28-105mm T3 FF Cine Zoom Lens is a serious contender. It's a full-frame cine lens with a 3.75x zoom range, covering a useful spread from wide-angle to short telephoto. At around $3,400, it's a significant investment, but it's designed to bring cine-style features like a T-stop rating, a 12-blade iris for smooth bokeh, and focus marks in feet to a more accessible price point than some dedicated cinema zooms. The big headline feature here is the autofocus switch, letting you toggle between manual and AF, which is a rare find in a cine-designated lens.

In our testing, the optical performance is where this lens really shines, landing in the 95th percentile for sharpness and clarity. That means you're getting a very clean, detailed image across the frame, which is crucial for professional work. The T3 constant aperture is decent, though it's not the fastest lens in its class, ranking in the 28th percentile for aperture. You'll need good light or higher ISO settings for low-light scenes. The autofocus is functional, ranking in the 45th percentile, but it's not the lightning-fast, silent AF you'd get from a dedicated photo lens. It's there as a useful tool for solo shooters or run-and-gun situations where you need a quick pull.

At $3,399, this lens sits in a tricky spot. It's much more affordable than a true cinema zoom from Cooke or Zeiss, but it's also significantly more expensive than adapting a high-end photo zoom. You're paying for the cine-specific build, like the geared focus ring and T-stop scale, plus that autofocus toggle. If you need those features and shoot on L-mount, it's a compelling package. If you're just after image quality and don't need the cine markings, a Sigma Art photo lens might offer better value.

This lens doesn't have many direct competitors, as most cine zooms are manual focus only. The closest comparison might be using a high-end photo zoom, like a Sigma 24-70mm f/2.8 Art, on a cine-modded adapter. You'd lose the dedicated T-stops and geared rings but gain a faster aperture. For L-mount shooters looking at dedicated cine glass, the Panasonic Lumix Pro lenses are worth a look, though they often lack this zoom range. If autofocus is a must-have for your workflow, this Sigma is pretty much your only option in a cine-style zoom. Against the listed competitors like the Meike 55mm or Viltrox primes, it's a different beast entirely—this is a versatile zoom for video, while those are faster, lighter primes primarily for stills.

This lens isn't for everyone. Travel vloggers or run-and-gun shooters who need lightweight, stabilized gear should look elsewhere—this thing is a brick. Photographers who primarily shoot stills will find it overbuilt and awkward. And filmmakers who already own a set of fast prime lenses for low-light work might find the T3 aperture a step down. For those users, a gimbal-friendly standard zoom or a set of faster manual cine primes would be better alternatives.

So, should you buy the Sigma 28-105mm T3 Cine Zoom? If you're a solo filmmaker, documentarian, or corporate video shooter on the L-mount system who needs a single, sharp, do-it-all zoom lens and values having autofocus as a backup option, it's a fantastic tool. The image quality is superb, and the zoom range is incredibly practical. But, if you shoot mostly in low light and need a faster aperture, or if you work with a dedicated focus puller on a rig and have no use for AF, you might find the T3 speed limiting and the extra cost for AF unnecessary. For those users, a used manual cinema zoom or a faster photo lens might be a smarter buy.