Canon Canon - RF45mm F1.2 STM Standard Prime Lens for Review

If you're shooting with a Canon RF camera and want a classic portrait lens that won't break the bank, the Canon RF 45mm f/1.2 STM deserves a look. It's a full-frame prime lens that's surprisingly compact and light at just 346 grams, making it a great walk-around option. The f/1.2 maximum aperture is its main event, landing in the 96th percentile for aperture, which means you get that beautiful, creamy background blur and great performance in low light. People often search for 'best budget RF portrait lens,' and with a price around $469, this lens is a strong contender for that title.

Let's talk about what that f/1.2 aperture gets you. In practice, it's fantastic for isolating your subject. The bokeh quality scores in the 94th percentile, so out-of-focus areas look smooth and pleasing, which is exactly what you want for portraits. The autofocus uses an STM motor, which is decently quiet and accurate for still subjects, though its AF performance percentile (47th) tells you it's not the fastest or best for tracking moving subjects. Optical performance is solid in the center, ranking in the 61st percentile, but don't expect absolute corner-to-corner sharpness wide open. It's sharp where it counts for portraits.

At $469, the value proposition here is clear: you're getting an f/1.2 lens for less than half the price of Canon's pro-level L-series primes. You make some trade-offs, like no weather sealing or stabilization, but for the core feature of that wide aperture, it's a great deal. If your main goal is shooting portraits on a budget, this lens delivers where it matters most.

Compared directly to other budget primes, it holds its own. The Viltrox 35mm f/1.7 Z is wider and cheaper, but its max aperture isn't as bright. The Meike 55mm f/1.8 Pro is a bit longer and has a slightly slower aperture. The Canon's main advantage is that native RF mount and the f/1.2 spec. If you're wondering 'is the Canon RF 45mm f/1.2 better than third-party lenses?', the answer is it depends. For pure optical speed and bokeh, yes. For versatility, video features like silent AF, or weather sealing, the third-party options might match or beat it in other areas.

So, should you buy this? If you shoot portraits with a Canon RF camera and want that magical f/1.2 look without spending over a thousand dollars, this is an easy yes. It's a purpose-built tool that excels at its main job. Just know its limits: it's not great for landscapes, and the AF won't keep up with sports. But for posed portraits, environmental shots, and everyday photography where you want beautiful background separation, it's a fantastic and relatively affordable way to get a pro-level look.