For ET-60 Lens Hood
1.Circle shape
2.For Canon ET-60
3.Screw interface

For ET-60 Lens Hood 

 This lens hood fits the following Canon lenses:
♦ EF 75-300mm f/4.0-5.6 USM, II, II USM, III & III USM Lenses

Key Features:

♦See tech specs for list of compatible lenses 
♦ Designed to prevent unwanted stray light from entering the lens 
♦ Ensures no problems with vignetting or motor functions 
♦ Added benefit of extra protection from accidental impact