Hasselblad has just announced a new camera: the 50-megapixel mirrorless medium-format X1D. They also announced two lenses to go with it, since the camera has a unique mounting system: a 45mm f/3.5 and a 90mm f/4.5. The camera will cost $9,000 for just the body, or a kit with both lenses will cost $14,000.
The camera is small for medium-format, but it's not small. It's larger than many full-frame cameras.
50-megapixels is a lot of resolution, but not necessarily for medium-format. In fact, you can find that much resolution in a couple of full-frame cameras. Even my old Nokia Lumia 1020 cell phone has almost that much resolution. Resolution is resolution, no matter the sensor size.
|The Closed Road - Fish Camp, California|
This is what 40-megapixels look like.
What a larger sensor gives you is a larger dynamic range and better high-ISO capabilities. But with advances in digital technologies, this has become less and less true--the advantage is not nearly as big as it used to be even just five years ago.
Besides that, as street photographer Eric Kim said, more megapixels equals more problems. More money. Bulkier gear. More storage. Slower software. And very few people actually need any more than 16-megapixels, so most of the resolution is wasted.
That's not to say that the Hasselblad X1D is a bad camera. In fact, it's probably a really good camera. But at a price tag that's similar to a used car, it's not a good value. But Hasselblad has never been known for it's value.