Pixinsight tool for optimum exposures?

[SimmoW]

Hi, I just discovered a very interesting tool in PI, under scripts/instrumentation, being 'CalculateSkyLimitedExposure'.

Screenshot attached.

Anyone use this? Is it remotely accurate/useful? At home I visually find that 5 minute subs are the limit (with a LP filter on), but this tool is suggesting only 1 min 34 second subs @ ISO 400. I applied the tool to an un-stretched RAW image.

Might try its suggestion next time.

It suggests 15 minutes for Heathcote. For my SLR! Not sure if that'd be correct.

Thanks in advance

[Mckechg]

Hey Simon,

it seems it lacks a lot of camera details. I couldn't list a 7D and wasn't sure of where I could get the required info.

Any suggestions. :help:

g./