Quote:
Originally Posted by TrevorW
The stars would not come into focus using DSLR the higher I set the AV value the better the focus appeared
Images taken at a lower f value appeared washed out or over exposed
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My settings in DSLR Focus are ISO800, Tv 4sec, Av 2.5 or 2.8 (working from memory here I drop down a couple of stops to improve the stars at the edges and corners in the final image), Quality medium fine (or fine medium which ever way round it is.) When focusing I'll sometimes put a piece of blu tak against the body of the lens and the focus ring to apply a bit of resistance to focusing other wise its too easy to overshoot backwards and forwards. Don't forget that at f/1.8 you only have 7 thousands of a millimeter of focal zone to work with. It is very very challenging to nail that focus at f/1.8