>>2885632>new xt1 or used a7r?a7r has better low light performance.
It also has better dynamic range, but it really isn't noticable unless you pixel peep.
Both sensors are actually made by Sony.
>i use only primes.Both mounts have fantastic primes.
Most Fuji x-mount lenses great, and while ther total number may be limited, they cover pretty much every focal range.
The FE lenses on the A7 are on the whole actually better performing lenses than the x-mount. Unfortunately they are expensive as FUCK (looking at $600 for the cheapest good prime) and x-box huge.
Check out pic related.