[Lee]

My ED80 is fully equipped with a very dusty inner objective lens surface.... see my horsehead pic from today for example.....
How could I clean it? - does the objective assembly unscrew off? - I haven't tried to in case I bugger something..... if it does unscrew, should I? Is there any critical reason why I shouldn't.
I realise I need to use flat frames, but at least reducing the dust now and again can't be a bad thing????