This phone feels nice as well. It's not too cumbersome to use one-handed, and it's light. I just wish it didn't look so nondescript.
Quantity Over Quality
There are five cameras in total on the A51, including the 32-megapixel selfie snapper on the front. It's a bit excessive, especially as none of them capture anything remarkable. The main shooter packs 48 megapixels, and it's joined by a 12-megapixel ultrawide-angle camera, a 5-megapixel macro camera for ultra close-ups, and a 5-megapixel depth-sensing camera for helping with the bokeh effect in portrait mode.
Photograph: Julian Chokkattu
Samsung Galaxy A51, Night mode. This is a solid low-light photo, though it could stand to be a little sharper.
Too often, the photos coming out of this phone look over-sharpened and overexposed, and lacking in shadows and contrast. Details in the photos are not as sharp as I'd like. The ultrawide camera has a fair amount of distortion toward the edges as well. I recommend using the 48-megapixel mode when there's good lighting, as you get more natural-looking photos. The macro camera mode is also a good deal of fun too.
At night, you'll want to use Samsung's dedicated Night mode, which takes multiple images at different exposures and stitches them together to make a clear, well-lit image. The result is solid if you can stay particularly still (slight movements might make things blurry). But it's nowhere near as sharp as Google's Night Sight on the Pixel 3A, which does a fantastic job illuminating low-light scenes.
I compared the $400 A51 with the $300 Moto G Stylus, and I usually preferred the daytime photos from the cheaper Moto phone. The A51 edged a slight win in low light, racking in a little more detail. Still, with the A51's performance and camera output sitting so close to phones that are $100 cheaper, it makes the phone feel overpriced.
Don't Pay Full Price
You can get this phone unlocked or from a variety of carriers like Verizon and AT&T. Samsung has a promotion that throws in a pair of its original Galaxy Buds for free. Or you can get it for $230 if you trade in an older phone in good condition.
Those are decent deals. However, I think it's a better move to buy the Google Pixel 4A, which costs $350. It will give you better performance, daylong battery life, a stellar camera, smarter software, and a headphone jack.
Or, if you're not opposed to using Apple's iOS, the $400 iPhone SE is an unbeatable value. It's IP67-rated water-resistant, has wireless charging (two things Samsung has pioneered for years, yet the A51 does not include), the same processor as the one in Apple's flagship iPhone 11 for superior performance, and packs a solid camera. TCL's 10 Pro is also a better buy, though it costs $50 more.
The Galaxy A51 is fine. But fine just doesn't cut it these days, especially when you're Samsung.