On: Cooled Nikon D5500a Chills the Sensor for Clearer Star Photos

[maxxxxx]

I wonder why they didn't pick a full frame camera like the D750. This would make more sense to me.

[amdavidson → maxxxxx]

APS-C sensor cameras get you an effective 1.5x multiplier on your focal length, handy for astrophotography.

You could always crop down a full frame photo to get the same effect, but then you're just wasting pixels.