Quote Originally Posted by Mad Aussie View Post
Not sure Kat (and many others) will understand that.

Kat ... my camera is a crop factor sensor. It has a multiply factor of 1.6. Nikon is usually 1.5. A full frame camera is 0.

What this means to you is quite simple ... if you shoot with the 10mm lens on a 1.6 crop camera ... you are not getting a 10mm shot. Multiply that 10mm by 1.6 and you are shooting with 16mm. So with a full frame camera I'd be shooting with 10mm and getting 10mm. A disadvantage here having a crop factor.

On the other end of the scale though my 400mm zoom gives me 640mm zoom. With a full frame it's just 400mm.
What TI was saying above is with his crop factor camera and using his 400mm with a 1.7 teleconvertor attached he gets 1000mm (a little over actually) focal length.

Kay..that makes total sense.

I hate trying to figure out what is best to get.. If I had all the money I'd for surely have three camera bases and a load of lenses....