| Performance: |
| Working Range: |
16M (50ft) to infinity |
| Optical Resolution: |
0.5 arc second |
| Clear Aperture: |
178 mm (7 inches) |
| Effective focal Length (EFL) |
2100 mm video/2400 mm with Image Erector |
| F-number: |
f/12 @ 2100mm EFL |
| Spectral Response: |
0.35 – 1.5 micron (other on request) |
| Optical: |
| Design Type: |
Maksutov Cassegrain Catadioptric |
| Corrector: |
BK7/MgFl2 178 mm CA (7 inches) diameter |
| Primary Mirror: |
Pyrex substrate, aluminum coated, SiO overcoat,193 mm (7.6 inches) diameter |
| Secondary Mirror: |
Aluminum coating on corrector, SiO overcoat,47 mm (1.85 inches) diameter |
| Baffling: |
Wire helix in central tube, precision threaded |
| Mechanical: |
| Barrel: |
Aluminum heat-treated tube with precision machined andmatching lens cell |
| Rear Closure Plate: |
Aluminum; machined and matched to barrel |
| Central Tube: |
Centerless ground stainless steel and 6 inch .mount plate |
| Mirror mount/focusing tube: |
Precision linear roller bearingmatched to central tube, integrated with mirror mounting thimble |
| Focus Mechanism: |
32 pitch ground stainless steel focus rod:Direct acting on mirror thi |
