Objective lens D131F700, separated blue film D131F1200, green film, DIY accessories for astronomical telescopes
131F700, 131F1200 Double-Separation Single-Layer Blue-Coated Objective Lens
Aperture: 131mm
Focal Length: 700mm, 1200mm
This objective lens is double-separated with a single-layer blue coating. This objective lens group consists of 2 separated lenses, with a 0.2mm-thick special spacer ring placed in between (without the spacer ring, the imaging quality will be seriously affected). The spacer ring will be provided upon purchase.
131F700, 131F1200 Double-Separation Multi-Layer Green-Coated Objective Lens
Aperture: 131mm
Focal Length: 700mm, 1200mm
This objective lens is double-separated with a multi-layer green coating. This objective lens group consists of 2 separated lenses, with a 0.2mm-thick special spacer ring placed in between (without the spacer ring, the imaging quality will be seriously affected). The spacer ring will be provided upon purchase.