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Wow, very nice. Thats helped me to decide what to do next imaging session. get the 300mm lens and HA filter out. I note youre shooting at ISO 1600. I too have noted I seem to get better data shooting at high ISO's with the HA filter.
yes youre right even with narrowband filters, the fact we use such fast F ratios means some moonlight will sneak past, thus we are best off using moonless skies for this work.
You use the fridge? what temps were you shooting at?
Thermal noise really is a pain with DSLR narrowband imaging. Your fridge comes in handy.
Scott
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