You asked

Is the om system om 1 mark ii good for wildlife?

Yes, the OM-1 Mark II is one of my wildlife favourites. It has a stacked sensor, very good bird detection and a light kit, which matters when you're carrying a long lens all day.

The lens does most of the work for wildlife, though. For reach, I'd look at:

For more on what to look for, see wildlife and sport.

Written by Claude from this site's pages.

From these pages