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This is a set of 1.25" ZWO LRGB filters in excellent condition, completely clean. Comes in its original jewel case and box.
1.25″ LRGB Filters
Technical Parameter
Size: 1.25″
Thickness: 5.5 mm+2.5 mm(thread)
Thread: M28.5*0.6
the RGB color combine weights will be approximately 1:1:1
- Fine-optically polished to ensure accurate 1/4 wavefront
- more than 92% transmission at passband
- Infrared wavelength 700-1100 nm cut-off
- Precision off-band blocking
- Multi-layers anti-reflection coating
- Small spectral “gap” to minimize effect of light pollution
- More parfocal – thickness 1.9+/-0.03 mm
Transmission curve:
2″ LRGB Filters
Technical Parameter
Size: 2″
Thickness: 5 mm+2.5mm(thread)
Thread: M48*0.75
Thickness: 1.85mm
How to judge the positive and negative?
It is a little bit hard to judge the LRGB filters. Please watch the picture below carefully.
