[Carl]

Thanks guys
Just got back in after doing some tests.
I borrowed the Canon Plastic 1:1.8 50mm from work. Maybe its been knocked around by the photographers at work, boy did it feel and manually focus cheaply. Not that impressed with the image.

I suppose I'm trying to weigh up the quality between the 2 50mm. Will one perform better under the stars than the other?

Also tested my Canon 16-35mm 1:2.8 L . When you shut down the aperture it's not too bad.

Some investigations to do.

Thanks for your help