Michel Talaïa
Member
The Canon PZ E1 Power Zoom seems quite good but unfortunately there is only one compatible lense (the new version of the 18-135, which don't have continuous aperture
)
http://www.bhphotovideo.com/c/product/1225881-REG/canon_1285c002_pz_e1_power_zoom_adapter.html
https://www.youtube.com/watch?v=CfR3-I1Dnpk
http://www.bhphotovideo.com/c/product/1225881-REG/canon_1285c002_pz_e1_power_zoom_adapter.html
https://www.youtube.com/watch?v=CfR3-I1Dnpk