Feature: 
3xOptical Magnification 
Sunshade Hood 
Adjustable diopter 
Rotatable Eye-Cup can fit different eye 
Adjustable frame fits different camera bodies 
Detachable mounting plate can be used on tripod directly 
3/4″ standard screw holes available for other equipments 

Specification: 
Lens: 3piece/group 
Magnification: 3× 
Dioper: ≤3 
Transmittance:>90% 
Lens Aperture: 40mm 
Support: 3-3.2″ 4:3-3:2 
Mode: Magnification/ Sunshade 

Compatible for 
for Canon 5D2 5D3 5DS 5DR 1DX 6D 7D 7D2 70D 750D 760D 
for Nikon D7000 D7100 D7200 D750 D610 D810 D800 D4 D4S 

Package Included: S3 Viewfinder 
1 x S3 Viewfinder