Is there a way to change the constrain angle like you can in Illustrator?

[TonyArrr]

Is there a way to change the constrain angle like you can in Illustrator? I am trying to animate an isometric drawing and I need to move objects at 30 degree angles. 

[n. tilcheff]

I think that you can only lock it to 45° and 90° when holding down Shift.

With 30° you would probably need to manually create grid lines to guide you.