1x Flattener

（After attaching）80ED Focal length

560mm

（After attaching）80ED Focal ratio

f/7

Lens Number

Triplet design(including one ED glass)

Image circle

APS-C

Back Focus

55mm（from the base of M48 male thread）

Weight

0.42kg

Rear-end thread type

M54×0.75              
M48×0.75 (M48×0.75 filter thread inside)

Product Size Diagram

Installation

Optical Path Diagram

Spot Diagram

Longitudinal Aberration

relative illumination diagram