Rental ID: CANON_EXTENDER_EF_1.4X_III
The new and improved Canon Extender 1.4x III increases the lens focal length by a factor of x 1.4 but does not reduce the image quality. The new MK3 version is a drastic improvement over its predecessor and features redesigned optics, improved data communication between the camera body / lens and also improved weather sealing protection.
The 1.4x Extender has seven optical elements in three groups, all elements feature Canon’s Super Spectra lens coating to reduce ghosting and flaring and a new Flourine coating to minimise marks left by spots of water residue, etc. The MK3 Extender has an internal CPU to facilitate fast and reliable data pass-through and reliable autofocus too.
The EF Extender 1.4x III only reduces the effective maximum aperture by just 1 Stop which is incredible considering the magnification is 1.4 x.