Eyepiece F'= 20 mm with 40 mm eye-relief
| Parameter | Value |
| Entrance pupil diameter, mm | 2,0 (5,0) |
| Object size (diagonal), mm | 10,06 |
| Spectral range, μm | 0,486-0,656 |
| Main wavelength (λ0), μm | 0,588 |
| Focal length for λ0, mm | 19,98 |
| Aperture ratio | 1:4,0 |
| Field of view, 2ω, deg | 29,0° |
| Linear field in image space, 2y', mm | 10,0 |
| Eye relief, mm | 40,0 |
| Back (front) focal length, mm | 6,1 |
| Optical system length, mm | 29,6 |
| Maximum vignetting,% | 43,9 |
| Maximum distortion from a flat object, % | -3,92 |
MTF (pupil 5 mm)
MTF (pupil 2 mm)
Opto-Technological Laboratory Ltd (Opto-TL) is innovative production enterprise founded in 2002. Main activity – design and manufacturing of optical products.
Quality Management System applied to development, manufacturing and service of optical components out of crystals and glasses, optical systems (including objectives), optical testing and measuring devices corresponds to GOST R ISO 9001-2015.
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