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Excellent work Ray, thank you. I will give it a try when the moon gets out of the way and if the clouds ever go. I will print it out and laminate it for the wall of the observatory workstation. I, for one, would be happy to pay for a little ASI1600 Android app that calculates sub lengths based on present conditions, i guess it would need to interface with the SQM app ( which i believe exists now) , or receive manual input of SQM reading from a handheld unit. Sort of an ASI 1600 exposure metre app.
I have been using 60" at Unity gain (139), but seems i need to try the mag20 f5 numbers now.
Last edited by glend; 20-07-2016 at 04:30 AM.
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