Turn your f/5 FSQ-106ED or FSQ-130ED into an insanely fast f/3.0 configuration with this F3 Reducer 0.6x. High refractive index and low dispersion glass is used in this reducer to suppresss lateral chromatic abberation and coma.
No crop. 45 seconds exposure ISO800 with Canon 6D on FSQ-106ED with F3 Reducer 0.6x.
Point spread function (star size) when used with F3 Reducer 0.6x
|Design||3 groups 4 elements|
|Coating||Fully multi-layer coated|
|OTA side Interface||M72 P1.0|
When used with FSQ-106ED
|Focal length||320 mm|
|Image circle||44mm (60% illuminated)|
When used with FSQ-130ED
|Focal length||390 mm|
|Image circle||44mm (60% illuminated)