131F700, 131F1200 double separation single layer blue film objective lens
Caliber: 131mm
Focal length: 700mm, 1200mm
This objective is a double-separated single-layer blue film. The objective lens group is composed of two separate lenses, with a special spacer of 0.2mm thickness placed in the middle (no spacer will seriously affect the imaging quality), and the spacer will be sent when you buy it.
131F700, 131F1200 Double Separate Multilayer Green Film Objective
Caliber: 131mm
Focal length: 700mm, 1200mm
This objective is a double-separated multilayer green film. The objective lens group is composed of two separate lenses, with a special spacer of 0.2mm thickness placed in the middle (no spacer will seriously affect the imaging quality), and the spacer will be sent when you buy it.
