Baader Semi APO Filter
- Two filters made into one for maximum brightness
- Combines Fringe-Killer with Moon & Skyglow for Semi-APO contrast with refractors
- Non-ageing sealed coating edges
The Baader Semi-Apo Filter is a combination of their popular "Neodymium Moon & Skyglow" and "Fringe Killer" Filters. It was developed after repeated reports of customers who were combining (stacking) the Baader "Neodymium Moon and Skyglow" filter with their Fringe Killer filters. The result was amazingly colour-corrected images to achromatic refractors. However, by stacking individual filters did produce reflections.
The Baader Semi-APO filter is a single, reflection-free combination of the Moon & Skyglow with a stronger coating of the Fringe killer with an IR blocker. The filter gives a virtually colour-neutral image without the blue and red halos (violet fringing), and an increase to image contrast.
|SKU (#)||2458398 (1.25") / 2458399 (2")|
|TRANSMISSION RANGE||multiple bands (see spectral image)|
|FILTER THICKNESS (WITHOUT CELL)||1 mm|
|AR-COATING||Phantom Coating® Group, planeoptically polished|
|FILTER SIZE||1 25 inch|
|FILTER USAGE||CCD, Color Correction, IR-Cut|
|FILTER MOUNTED||Mounted (LPFC 6mm)|
|TYPE OF FILTER||Bandpass|
|SINGLE OR SET?||Single Filter|