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Stub Mandrel

M51 from last night

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28 two-minute subs at ISO800 using th3 Canon 450D with th3 150PL. I was amazed at how well it picked out the fainter bits for so few subs.

I'm trying another run combining with 100+ 30 second ISO1600 subs from last year.

If it works OK I will try drizzling a crop.

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Looks good. 2 minutes subs on an EQ3 with a long fl, and still nice round stars, that's quite a feat. :icon_salut:

If I were you, I probably wouldn't mix in shorter subs. You run the risk of revealing the fixed noise pattern of the camera (despite bias frames). But if you can manage 50+ 2 minute exposures, that would really bring the noise down. Otoh, 100 minutes clear sky may be too much to ask for. :icon_biggrin:

Thanks for sharing

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