Askar 80ED Imaging Accessories - Flatteners and Reducers for 80ED

The Askar 80ED is designed with three imaging accessories: a 0.7x reducer, a 0.85x reducer, and a 1.0x flattener. Users can choose the appropriate accessory based on their needs when capturing objects with the 80ED. 

Specifications

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)

 

0.85x Reducer
（After attaching）80ED Focal length	476mm
（After attaching）80ED Focal ratio	f/5.9
Lens Number	Triplet design(including one ED glass)
Image circle	APS-C
Back Focus	55mm（from the base of M48 male thread）
Weight	0.44kg
Rear-end thread type	M54×0.75               M48×0.75 (M48×0.75 filter thread inside)

 

0.7x Reducer
（After attaching）80ED Focal length	392mm
（After attaching）80ED Focal ratio	f/4.9
Lens Number	Triplet design(including one ED glass)
Image circle	APS-C
Back Focus	55mm（from the base of M48 male thread）
Weight	0.32kg
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