Think Tank EP-NZ Eyepiece for Nikon Screw In Mounts - 639 PTZ Cameras it has a 9-blade circular

it has a 9-blade circular aperture for beautiful

natural color with almost no purple/green fringing both within focus and In bokeh

In the case of the EL-10 you get superior coordination between the camera and the flash unit compared to previous Canon Speedlites

Auto-Sensing Transceiver

Think Tank EP-NZ Eyepiece for Nikon Screw In Mounts - 639 PTZ Cameras it has a 9-blade circularFeatures: Hydrophobia eyepiece (EP) for Nikon screw in eyepiece mounts. EP NSI is required to use any Hydrophobia rain covers with flagship Nikon DSLR cameras that have screw in eyepieces such as D2x, D2Hs, D3, etc. Compatible with: Nikon D3X Nikon D3s Nikon D3 Nikon D2Xs Nikon D2X Nikon D700 Hydrophobia 300 600 V2. 0 Hydrophobia 70 200 Hydrophobia Flash 70 200