Flats have ripple - FlatMaster 150
Posted: Fri Jun 25, 2021 1:30 am
Hello,
I just started using the FlatMaster 150 and have noticed a problem. There is a sizeable ripple in the output that shows up when applied to the lights that I've taken. Attached is a (compressed jpg) of a flat taken with an ZWO ASI1600MM Pro with a Lum filter. From PixInsight, the statistics for this 12 bit image are:
M13_0_13sec_1x1__0001
K
count (%) 100.00000
count (px) 16389120
mean 1774.81
median 1774.59
stdDev 47.01
avgDev 37.47
MAD 31.99
minimum 1509.65
maximum 2020.54
The ripple is 1775+/-40 or so. This is very noticeable in a final stretched image.
I haven't taken apart the device yet but wonder what the issue is. Any suggestions?
Mike
I just started using the FlatMaster 150 and have noticed a problem. There is a sizeable ripple in the output that shows up when applied to the lights that I've taken. Attached is a (compressed jpg) of a flat taken with an ZWO ASI1600MM Pro with a Lum filter. From PixInsight, the statistics for this 12 bit image are:
M13_0_13sec_1x1__0001
K
count (%) 100.00000
count (px) 16389120
mean 1774.81
median 1774.59
stdDev 47.01
avgDev 37.47
MAD 31.99
minimum 1509.65
maximum 2020.54
The ripple is 1775+/-40 or so. This is very noticeable in a final stretched image.
I haven't taken apart the device yet but wonder what the issue is. Any suggestions?
Mike