I got bored so I decided to make this for 1.1 too.

Press L+R+Up to zoom in, Press L+R+Down to zoom out
This code can be used practically anywhere in the game where there isn't a built in zoom function
(for example it won't work in your house, but it will work in your attic)
Code:
B22AF4F4 00000000
94000130 FCBF0000
000000D4 1EEE0000
000000D8 0000A000
D0000000 00000000
94000130 FC7F0000
000000D4 27F60000
000000D8 00010E14
D2000000 00000000
Converted to 1.1 by me.