Thinking of buying a new OM-1 mk2 (1 Viewer)

[MelospizaMelodiaFan]

...as Ive only started getting into photography of birds

You want a better camera, yes. That feeling never goes away; all of us want a better camera.
There is a lot to learn as a beginner, and you don't need the latest premium gear to pursue it. It is easy to find barely used equipment at a reasonable price. I say get a used setup and use the crap out if it. If you still are into bird photography at that point, then go ahead and spend the big bucks.

 

[IanBen]

I have the OM 150-600 mated with a OM-1 - images are crystal clear hand held at 600 (1200). I use to have the Oly 100-400 with 1.4x and the 150-600 is far a superior set up

 

[10ForCash]

I have the OM 150-600 mated with a OM-1 - images are crystal clear hand held at 600 (1200). I use to have the Oly 100-400 with 1.4x and the 150-600 is far a superior set up

What's the weight difference do you know ?

 

[IanBen]

What's the weight difference do you know ?

I haven’t the exact figures for weight, but I did purchase a Peak Design Slide Strap so I could use the supports on the lens rather than the supports on the camera so subconsciously I felt that the weight was too much for the cameras mount. I can still shoot handheld without any issue though, the camera and lens have sync stabilisation, the same as you’d have if you were using the 300 F4 Pro lens. The only reason OM haven’t classified the 150-600 a pro lens is because it has a variable aperture, which doesn’t bother me.

 

[njlarsen]

What's the weight difference do you know ?

Google, bing, etc are quite good at answering questions such as this.
Niels