Dianthus opened this issue on Feb 15, 2006 ยท 12 posts
Nameless_Wildness posted Wed, 15 February 2006 at 6:14 PM
1 x 4 ext on a 100-400 will make it: 140mm - 560mm! (40mm in every 100mm) loose about one stop!...but up the ISO to compensate:)
