MilwaukeeLion Posted March 11, 2018 Share Posted March 11, 2018 With Bahtinov mask on, blocked maybe 60% of photons? Been while since imaged galaxy, cold few hours outside. Darks & Bias with mask on too, should've left on for flats . 3 min subs, F6.3 reducer, C11-DSLR. Got some PEC data, joy. Link to comment Share on other sites More sharing options...
alacant Posted March 11, 2018 Share Posted March 11, 2018 23 minutes ago, MilwaukeeLion said: Bahtinov mask Hey, really sorry, what a pity. Very nice scale. You must have another go now:) Link to comment Share on other sites More sharing options...
Demonperformer Posted March 11, 2018 Share Posted March 11, 2018 Been there, done that (like many on here, I suspect ) Link to comment Share on other sites More sharing options...
ollypenrice Posted March 11, 2018 Share Posted March 11, 2018 The darks and bias must be done with no light getting into the camera so the mask won't affect those. You've got a pretty good image scale there so without the mask you'll get a good M51. Olly Link to comment Share on other sites More sharing options...
Adam J Posted March 12, 2018 Share Posted March 12, 2018 That is impressive considering. Link to comment Share on other sites More sharing options...
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