| Customization: | Available |
|---|---|
| After-sales Service: | 1year |
| Warranty: | 1year |
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| Universal parameter | |||
| Focal length (f') | ±2%@587.6nm | Local aperture | 0.5 |
| Dimensional tolerance | +0/-0.2 | Degree of finish | Level lV |
| Center thickness | ±0.1 | Light aperture | >90%p |
| centrality | 3' | Coating film | MgF2 anti-reflectionfilm |
| Aperture | 3 | ||
The double-glued achromatic negative lens is composed of low refractive index (crown glass) and high refractive index ( glass). The paraxial aberrations such as spherical aberration, coma aberration and chromatic aberration are well corrected by computer optimization design, and can be used as Barlow mirror or magnifying mirror to extend the focal length of the telescopic objective
| model | Diameter(φ) | Focal length(f' ) | Back intercept(fb) |
| XSC-711 | 25.4 | -30 | -36.15 |
| XSC-712 | 25.4 | -40 | -44.4 |
| XSC-713 | 25.4 | -50 | -53.37 |
| XSC-714 | 25.4 | -75 | -77.65 |
| XSC-715 | 25.4 | -100 | -102.37 |
| XSC-716 | 25.4 | -150 | --152.6 |
| Note: The default unit for all specifications above is mm(mm) | |||
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