QHY IR890 CH4 Methane Filter - 1.25" - 40044 vendor-orion The back focus length (BFL)

The back focus length (BFL) of the 5III V2 camera is only 8mm

it''s well suited for viewing details on 3D objects such as leaves

it can be directly threaded onto the 1

which is the 2" model

QHY IR890 CH4 Methane Filter - 1.25" - 40044 vendor-orion The back focus length (BFL)The QHY 1. 25" Methane imaging filter is useful for capturing high altitude methane (CH4) clouds in the atmosphere of planets like Jupiter & Saturn by allowing the near IR light centered at 890nm to pass through. It is important to remember that this filter is for photographic use only. It is best for cameras with high infrared sensitivity, like the QHY462C, ASI185MC or the ASI224MC.