Filter information
The following factors should be applied to equalise SNR to the data for the Clear filter set out above.  Clear = 1.0 B 2.8 Luminance 1.3 SII 16.5 g' 1.7 NIR-L 3.7 V 2.4 Red   2.6 Ha 16.8 r' 1.4 NIR-1 4.1 R 1.8 Green   2.6 OIII 15.3 i' 2.4 NIR-2 6.3 Blue   2.1 NIR-3 6.1 Filter focus offsets, 9 August 2015 (avg. of three readings) (steps: 1000 steps = 1mm) Clear B V R Lum Red Green Blue 0 90 10 -30 -40 -70 -5 60 SII Ha OIII g' r' i' -50 -60 -20 -20 -20 -10 NIR-L NIR-1 NIR-2 NIR-3 170 150 150 0
Hills Observatory: 1 January 2013 to 16 November 2018
COMETS COMETS
DEEP SKY DEEP SKY
 
Settings for MPO Canopus First Order Extinction B V R C 0.630 0.488 0.437 0.452 Transforms & Zero Point B V R C Transform -0.213 -0.038 -0.151 0.727 Zero Point 23.708 23.658 23.676 24.698 Approximate bandpass of filters (nm): Clear 390 - 1000 B 350 - 500 V 470 - 650 R 550 - 850 Luminance 390 - 710 Red 610 - 690 Green 490 - 570 Blue 390 - 510 SII 669 - 674 Ha 653 - 658 OIII 498 - 503 g' 400 - 550 r' 560 - 700 i' 700 - 850 NIR-L 700 + NIR-1 700 - 800 NIR-2 800 - 900 NIR-3 850 +