Your camera doesn't matter, but sometimes your lens does.
In optical image formation, the box-with-the-film-in-it behind the lens matters a lot less than the lens.
Sometimes, the lens does matter, a lot:
But most of the time, in my opinion, you can grab good shots with an iPhone:
Similarly, for the most part, your scanner doesn't matter (much), but your pulse sequence sure does. When zeugmatographers discuss various kinds of MRIs – something we love to do, by the way – we talk about functional imaging vs. diffusion imaging vs. angiographic imaging, about spin echoes vs. gradient echoes, but not (much) about which manufacturer (e.g., GE, Philips, Siemens) made our scanners...
[First illustration: Backyard yesterday, in the first snow of the season. Nikon 105 mm f/2.0 lens on D200 camera (1/4000 s, ISO 3200).]
[Second illustration (slideshow): iPhone photos, from a weekend visit to NY & NJ last year.]
[Disclaimer: Brand names are the property of their respective owners, & their appearance here does not denote sponsorship or endorsement; NeuroCooking is also not supported by General Motors, makers of Cadillac vehicles, which combine legendary luxury with state of the art performance.]