Quote:
Originally Posted by Bassnut
Spectacular Bert, interesting you went with Nii
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Fred there is some conjecture whether at F3 that 3nm NB filters have 'leakage' from HA to NII and the converse due to frequency shift caused by the modulation of the incoming beams dependant on the angle at which they are incident on the 3nm filter.
I have found that NII data shows more detail in nebulosity especially the faint stuff.
The only way to solve this conundrum is to image a pure HA or NII object with both filters.
Bert