Resolution of a 4K image cropped to 2.39

[Servo]

Slightly off topic, but anyone know the resolution of this image (I'm not a mathematician)? Rather than shooting anamorphic, I'm thinking of getting a 4K camera.

[HurtinMinorKey]

Slightly off topic, but anyone know the resolution of this image (I'm not a mathematician)? Rather than shooting anamorphic, I'm thinking of getting a 4K camera.

 

Aren't there aesthetic qualities to an anamorphic lens than the aspect? I was wondering if high resolution sensors would make anamorphic unnecessary one day. 

[Servo]

There are, but I've been researching buying and shooting anamorphic lenses for weeks (I haven't gotten the EOSHD guide, though), and although I'd really like them, they're going to limit what I can do on some short films I want to shoot. If I had the time and money, I'd like to do it. For now, it's a little impractical, and for work I do for clients as a videographer, 4K camera that I can always use as a run and gun camera is going to be much more helpful.

[Nikkor]

If you don't want the look, cropping 4k is ok, unless you need the extra resolution, but if that's the case you would need a real expensive professional lens.

[KarimNassar]

Depends on the available images size of the sensor

 

regarding  the red epic:

 

shot in 4k HD at 3840/2160

 

croped at 2.39:1 : 3840/1607

 

shot in 5k FF at 5120/2700

 

croped at 2.39:1 : 5120/2142