iOptron LRGB Imaging Filter Kit -1.25"
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The iOptron LRGB Imaging Filter Kit is a high‑performance four‑filter set (Luminance, Red, Green, Blue) mounted in 1.25″ cells, built for astrophotography and precision color imaging. Designed to provide exceptional clarity, contrast and colour fidelity, this kit is ideal for dedicated imaging systems using monochrome or OSC cameras paired with filter wheels.
Key Features:
- A full LRGB set: one Luminance filter plus Red, Green and Blue colour filters, enabling full‑colour imaging with optimal signal.
- Mounted in standard 1.25″ threaded cells, making it compatible with most 1.25″ filter wheels and imaging trains.
- Multi‑layer anti‑reflection coatings to maximise light transmission (≈95% transmission) and maintain sharp star images.
- High optical quality: surface flatness < λ/4, parallelism maintained, surface quality rated 60/40.
- Thoughtful filter design: the kit features a broader gap between red and green to block the sodium light‑pollution line (~589 nm), and overlapped blue/green transmission to let key emission lines (e.g., O III) pass with high efficiency, enhancing natural‑colour and narrow emission imaging.
- Built for astrophotography, not for direct solar observation. Avoid using for sun imaging or visual solar work.
Why it stands out:
This LRGB kit offers a robust entry into true‑colour astrophotography workflows. By using separate L, R, G and B filters you capture each channel cleanly, then combine them later in processing to yield vivid, detailed images with good contrast. The iOptron set’s focus on transmission, optical flatness and colour separation makes it a reliable choice for users who already own a monochrome camera or who want to upgrade from simpler dual‑band or broadband filters.
Typical Use Cases:
- Guide setup for capturing deep‑sky objects (nebulae, galaxies, star clusters) using a monochrome sensor and filter wheel.
- Workflow where you shoot luminance (high detail, high signal) then colour data separately for maximum image fidelity.
- Astrophotographers who want clean, natural colour results with minimal artefacting from light pollution sources (the sodium‑line gap helps).
- Integration with your existing imaging train (camera → filter wheel → focuser → telescope) in a compact form factor.