MalcolmR 0 #1 October 4, 2007 How does “angle of view” when expressed “ X x Y” translate to the other methods that I’ve seen of describing a lens angle? For example, if a lens is described as having a “71 x 93 angle of view” what does that make it? For instance, would that make it a .42 or .5 lens? Thanks! Malcolm Quote Share this post Link to post Share on other sites
DSE 5 #2 October 5, 2007 71 x 93 would be a 180 degree angle, or a .5 lens, more or less. Quote Share this post Link to post Share on other sites
quade 4 #3 October 5, 2007 Angle of view is just that, the number of degrees you will be able to see. In this case from top to bottom covers 71° and from side to side covers 93°. (Hardly 180 DSE, I don't know where you're getting that.) As for .42 and .5 . . . that's a focal length multiplier of a wide angle adapter, but it's practically meaningless unless you know the focal length of the lens you're going to be putting it on (and maybe a little math as well). It will have a different effect depending on the main lens and imager size. Further, different manufacturers of wide angle adapters have a tendancy to mark them in different ways and a .6 from one manufacturer might actually be wider than a .45 from a different one. Strange but true. Check out this page; http://futurecam.com/wide.html. It's old but accurate. Your absolute best bet is to wander around the drop zone and try other people lenses on your camera and see which ones might fit your needs. JUST going off the numbers listed in a catalogue is going to be an exercise in futility.quade - The World's Most Boring Skydiver Quote Share this post Link to post Share on other sites
