Every once in a while, a product comes along that changes the dynamic of an entire industry. The iPhone did it in 2007, the Mustang did it in 1964, and Converse did it with the All Star sneaker way back in 1917. Now, Sony is poised to upend the camera industry with the new Alpha A7 and A7R mirrorless cameras.

The A7s are the most advanced and expensive mirrorless cameras Sony has ever produced. They may look similar to the company’s line of NEX cameras, but the A7s have one significant difference: a *much* larger image sensor. Bigger sensors simply produce better pictures, and the full-frame sensor in the A7s is one of the biggest you can get in a consumer-level camera.

Of course, these aren’t the first full-frame cameras out there. But most cameras with big sensors are big and heavy and destined to spend most of their time at home. Sony’s earlier fixed-lens RX1 shifted this notion a bit: it’s a remarkably small camera with a great big sensor stuffed inside. But with a fixed lens and a price tag nearing $3,000, the RX1 made little sense for most buyers.

The new A7 and A7R are still expensive ($1,699.99 and $2,299.99, respectively) but they are significantly cheaper than the RX1. And they let you change lenses. They’re directly comparable to a full-frame DSLR such as a $1,899.99 Canon 6D or a $1,999.95 Nikon D610 — and the A7s are smaller, more portable, and much more approachable for photographers serious and amateur alike.

Most people take pictures with their smartphone (just look at the top three cameras on Flickr), but not because they take the best pictures — it’s because they’re small and portable and always with us. What if you could have a camera that has all of the flexibility and picture quality of a professional DSLR, but can fit in almost any shoulder bag? With the A7s, Sony offers just that.