Quote Originally Posted by Joel Eade View Post
This one plus a 1.4 extender would probably have pretty good IQ above 1300mm..... but you have to sell your house to get one

http://www.the-digital-picture.com/R...ns-Review.aspx
I was having trouble finding the ISO charts for that one...

and if I sold my house where would I live. I guess I could push this lens around in my grocery cart.