L-Pro UT（0.3mm）
L-Pro UT is an upgrade of L-Pro designed to improve coma at the wide-angle end of in-camera star-field photography. It is a highly versatile astronomical filter. For deep-sky objects and Milky Way star fields, its multiple passbands within the visible 400-700 nm range preserve color reproduction and image detail that other light-pollution filters lose by blocking much of the detail. In light-polluted environments it suits emission nebulae, repeated as emission nebulae in the source, as well as continuous-spectrum targets. For visual observation, it provides ample throughput while reflecting light-pollution bands to improve contrast and highlight celestial objects.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Average Peak Transmittance | >90 % |
| Blocking Range | 380–750 nm |
| Blocking Depth | Light Pollution Blocking >90 |
| Surface Finish | 60/40 |
| Surface Figure | λ/4 |
| Parallelism | 30 arcsec |
Datasheet
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