Which Sigma Lens Should You Actually Buy for APS-C? Sigma 16-300 vs Sigma 100-400
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Sigma sent me two lenses to test — the 16-300 Ultra Zoom and the 100-400 Telephoto Zoom. Both are genuinely excellent at what they do, both cover massive focal ranges, and both had to go back to Sigma the day after I finished filming, which I was honestly sad about. I enjoyed my time with both of these more than I expected.
But they are not interchangeable. Despite some overlap in focal length, these two lenses are built for completely different photographers. Here's the honest breakdown of who each one is actually for.
What They Have in Common
Both lenses are part of Sigma's Contemporary line, which means solid build quality at an accessible price point. Both use a 67mm filter thread — which for the 100-400 is genuinely impressive given how long that focal range extends. Both have a zoom ring up front, a focus ring toward the back, and locking switches to prevent lens creep during travel or handheld shooting.
Both lenses also use variable aperture. The 16-300 runs from f/3.5 to f/6.7 across its range. The 100-400 runs from f/5 to f/6.3.
That's where the similarities end.
The Sigma 16-300: Built for Versatility
The 16-300 is designed to be a single, portable lens that replaces your kit lens and does nearly everything. This isn't a lens chasing maximum sharpness or the creamiest bokeh — it's built to get the shot, whatever that shot happens to be.
Think of a parent photographing their kids at a soccer game, a traveler who doesn't want to swap lenses mid-trip, or anyone who wants both wide landscapes and telephoto reach without carrying multiple lenses. On APS-C, the 16-300 gives you a 24-450mm full frame equivalent range — more than enough to cover almost any situation you'll encounter.
I took this lens out to Central Park at 16mm, roughly half an arm's length from the camera, and got genuinely great background separation for a lens in this class. It also works surprisingly well as a vlogging lens at the wide end, and you can pull all the way out to a 450mm equivalent if you need reach. I wouldn't necessarily recommend using 300mm to film yourself — the angle isn't flattering — but the option exists, which says a lot about the range this lens covers.
I even used the 16-300 as my B-camera lens on a paid shoot. It's not the lens I'd reach for exclusively on professional work, but it absolutely can hold its own there. It's a jack of all trades, master of none — and once I own this lens, it's the one that stays on my camera by default for travel. It's light, easy to carry, and covers an enormous amount of shooting scenarios in a single package.
The Sigma 100-400: Built for Purpose
The 100-400 is a different kind of lens entirely. This one is built for someone in the prosumer space who already knows they're going to be shooting in telephoto territory regularly — sports, wildlife, anything that demands reach and image quality together.
Think of a student shooting high school or college sports from the sideline who needs real focal length but is working with a limited budget. On APS-C, the 100-400 gives you a 150-600mm full frame equivalent — genuinely serious reach.
I'm not someone who shoots a lot of telephoto in my day to day work, but I was pleasantly surprised by the image quality coming out of this lens. You can get in tight on a subject from a real distance and the results hold up.
One thing worth noting: the 100-400 uses an older autofocus system compared to the 16-300, since it's a relatively older lens in Sigma's lineup. It's still fully usable, particularly for stills, but I'd like to see Sigma update the autofocus motor in a future revision.
This lens is purpose-built for someone who's living in telephoto range regularly — not just hobbyists, but prosumers who might be selling images, shooting for a school paper, or building a photography business. I'd trust this lens on a professional shoot without hesitation. I actually had a shoot lined up to use it with the Yankees before a trade deadline roster shuffle got in the way — but if that opportunity comes back around, this is the lens I'm reaching for.
Price and Autofocus Differences
The 16-300 is the newer of the two lenses and benefits from newer autofocus motors — though interestingly, those motors run slightly slower. That doesn't make them bad, especially for photo-focused work, just a different tuning than what's in the 100-400.
At the time of testing, the 16-300 comes in just under $700, and the 100-400 comes in just over $1,000. A few hundred dollars apart, which in the world of telephoto and superzoom glass isn't a massive gap.
Which One Should You Buy?
If you want one lens that covers almost everything — family photos, travel, kids' sports, wide landscapes to moderate telephoto — the 16-300 is the better choice. It's compact, versatile, and genuinely enjoyable to shoot with day to day.
If you know you're going to live in telephoto range specifically — sports photography, wildlife, bird photography — the 100-400 is going to deliver noticeably better sharpness and contrast at that end of the range, even though it's heavier and more specialized. Neither lens is the "better" lens in a vacuum. They're built for different jobs.
If you pick up either one, I'd love to know what you're planning to shoot with it. Links to both lenses are in the description of the video below.
If you want to see my full breakdown, the full video is available HERE
