Optolong UBVRI Fotometrische Filterset 2″: meten in plaats van alleen mooi plaatjes maken
Those who transition from astrophotography to science move into photometry: the precise measurement of star brightness. This set includes the five filters of the photometric standard system: U (ultraviolet), B (blue), V (visual green), R (red), and I (near-infrared).
Doordat de banden de wereldwijd gebruikte standaard volgen, zijn je metingen direct vergelijkbaar met professionele data. Denk aan lichtcurven van veranderlijke sterren, exoplaneetovergangen of het volgen van supernova’s.
For the citizen scientist
With this set and a monochrome camera, you can provide measurements that are useful for international campaigns and observer networks. Educational institutions and observatories also use UBVRI sets for practicals and research.
Technology
Each filter consists of high-quality 1.85mm Schott glass, double-sided polished to lambda/4 with a polishing quality of 60/40. The multi-layer IBAD (ion beam assisted deposition) coatings are scratch-resistant, color-stable, and unaffected by temperature fluctuations.
Featured accessories
A five-position filter wheel accepts the complete set, allowing you to run measurement series without manual switching.
For whom yes and for whom no
- ✓ Variable star and exoplanet transit observers
- ✓ Observatories, societies, and educational institutions
- ✗ Wie puur esthetische astrofoto’s wil maken: een LRGB-set is daarvoor de juiste keuze
Specifications
| Content | U, B, V, R, I (photometric standard bands) |
| Size | 2 inch (M48 x 0.75) |
| Glass | Schott, 1.85 mm, double-sided polished lambda/4 |
| Polishing quality | 60/40 (MIL-O-13830) |
| Coating | Multi-layer IBAD, scratch-resistant, and temperature-stable |
| Observation goals | Photometry, scientific measurements |
You can find more accessories for this merk at the Optolong merk page.
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