thinking 'our lens is f 4.6 - fast!' 'er.. damn, that makes a ruddy awful number sequence, let's call it 5''ah no, 5 would be right beside 4.6 and everyone would just think it was a f5 lens.. mebbe we span it out a reasonable distance (uncle Dave's steel stamps would squish atop one another) and go for 6?'
'Excellent plan Nigel! Alrighty then, 6 it is..' '6, 12, 24,48,96, 192, 384 then. '
