Smart Histogram - Stack Time vs Exposure Time vs Gain?
Posted: Thu Jul 12, 2018 10:07 pm
Robin or anyone,
I had been using a DSLR but now have a ZWO 178 mmc and so I am experimenting with the Smart Histogram (SH). In order to use it to it's potential I want to make sure I understand the minimum exposure result and how it relates to the total stacking exposure time. When I recently ran SH with a goal of obtaining a 2hr total exposure it recommended an Optimal Gain of 42 and an Optimal exposure of 477s per frame so that would be 15 frames total. Using the graph I could also see that if I set the gain to 250 the exposure per frame would be about 240s which would be 30 frames for a 2 hour total Stack time exposure.
My question:
According to the Smart Histogram result, other than dynamic range, would these two settings be approximately equivalent as far as the final 2hr stacked image?
Setting A: 477" x 15 frames at 42 gain
Setting B: 240" x 30 frames at 250 gain
Thanks.
Scott
I had been using a DSLR but now have a ZWO 178 mmc and so I am experimenting with the Smart Histogram (SH). In order to use it to it's potential I want to make sure I understand the minimum exposure result and how it relates to the total stacking exposure time. When I recently ran SH with a goal of obtaining a 2hr total exposure it recommended an Optimal Gain of 42 and an Optimal exposure of 477s per frame so that would be 15 frames total. Using the graph I could also see that if I set the gain to 250 the exposure per frame would be about 240s which would be 30 frames for a 2 hour total Stack time exposure.
My question:
According to the Smart Histogram result, other than dynamic range, would these two settings be approximately equivalent as far as the final 2hr stacked image?
Setting A: 477" x 15 frames at 42 gain
Setting B: 240" x 30 frames at 250 gain
Thanks.
Scott