BEFORE cleaning the low pass filter.
Setting a long exposure allows all the dust particles to be seen clearly.
DR (dust rating) = 10/14. I created this rating system to rate the ratio of significant dust particles to total dust particles. 10/14 means 10 significant particles while the remaining 4 are not negligible.
AFTER cleaning the low pass-filter.
Took my tornado blower, locked the mirror up and started blowing the low pass filter.
DR = 2/5.
Setting a long exposure allows all the dust particles to be seen clearly.
DR (dust rating) = 10/14. I created this rating system to rate the ratio of significant dust particles to total dust particles. 10/14 means 10 significant particles while the remaining 4 are not negligible.
AFTER cleaning the low pass-filter.
Took my tornado blower, locked the mirror up and started blowing the low pass filter.
DR = 2/5.
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