Kowa Lens Microscope Objective Lens LM12JCM
Iris Mount: C-Mount Lens Additional Information 2 Megapixel Rated, Low Distortion.
Focal Length (mm) 12
Lens Type Fixed
Image Size (mm) 2/3" (Φ11)
Iris Range (F-stop) F1.4 ~ F16
Focusing Range (m) 0.15 ~ ∞ I
ris Control Manual Focus Control Manual Shooting Range at M.O.D. (mm) 110(H) x 82.5(V) Angle of View 2/3" (°) 38.3 x 26.2 Angle of View 1/2" (°) 28.3 x 21.4
Angle of View 1/3" (°) 21.4 x 16.1 Resolution (Center, Corner) 120lp/mm, 100lp/mm TV Distortion (%) -0.07 Back Focus in Air (mm) 11.7 Mount C-mount Filter Thread Size (mm) M27 x P0.5
Minimum Focus Distance (m) 0.15
Flange Back in Air (mm) 17.526
Front/Rear Effective DIA (mm) Φ15.8, Φ14.1 Exit Pupil (mm) -215 Size (mm) Φ34 x 37
Weight (g) 75
Temperature Range (°C) -10 ~ +50
Industry knowledge about the eyepiece
An eyepiece consists of several "lens elements" in a housing, with a "barrel" on one end. The barrel is shaped to fit in a special opening of the instrument to which it is attached.
The image can be focused by moving the eyepiece nearer and further from the objective. Most instruments have a focusing mechanism to allow movement of the shaft in which the eyepiece is mounted, without needing to manipulate the eyepiece directly.