In reply to galpinos:
> (In reply to jongriffith)
>
> Well done, John, a good read.
>
> Just one point, (I may have got this totally wrong but...) Clare's comment on the Apeture size, "little, big, little" has confused me. Is it not little big big , ie, little number, big aperture, lots of light?
>
> (I'm not a photo buff so go easy)
the way I think of it is little number, big aperture to *get* lots of light in when there's *little* light - little number for little light. To be fair I hadn't quite intended for the comment to be directly pasted (!) but I hope it makes sense - it's just what works for me.