Saw this lens and it's specs...
http://www.sigmaphoto.com/html/pages/15_30_ex.htm
The filter size is stated as rear (gelatin filter insert type), what that?
It has a non-removable petal shaped lens hood, wonder how to protect the lens leh?
http://www.sigmaphoto.com/html/pages/15_30_ex.htm
The filter size is stated as rear (gelatin filter insert type), what that?
It has a non-removable petal shaped lens hood, wonder how to protect the lens leh?