A Good Sony remote control?

[noone]

I am after a better remote control for my A7s.

I (finally) got one mainly to try and use clear image zoom for video especially with fast primes and my 17mm tilt shift lens (on a tripod)..

It was really cheap ($8.50 Australian posted so about $6 US) but it does actually work except when zooming, unlike doing it on the camera where if i keep my figure on the left/right buttons it will zoom smoothly, on the remote I have to keep lifting off and on so it is very jerky.

Any one know if any better remotes will allow for smooth zooming with the likes of my FD 85 1.2 L?