Sigma 20mm F1.8 EX DG

Have one 2nd hand available locally at an attractive price. I do already have an 18-50mm F2.8 EX DC on my D80.

I am trying to get an ultra wide lens. This 20mm F1.8 has an Angle of View of 94.5 degrees per Sigma's web site. The 18-50mm has a listed Angle of View of 69.3 - 27.9 degrees. But one is DG (full frame) and one is DC. I know if I use the 20mm DG, it will be a 30mm on my D80. But I don't know how to caculate the angle of view.

Will I get a wider angle of view using the 20mm on my D80?

Thanks

所有跟帖： 

• no, your 18-50mm should be still wider. -jzz- ♂ (0 bytes) () 11/04/2008 postreply 15:42:48

• x2 -pieq314- ♀ (0 bytes) () 11/04/2008 postreply 18:35:09