jambouk Posted November 24, 2013 Share Posted November 24, 2013 What kind of magnitude stars can be picked up on a bog standard dslr sensor aat prime focus on a bog standard 80mm refractor on a tracking equatorial mount for say a:30 second exposure1 minute2 minute5 minute10 minute....Thanks for any replies.James Link to comment Share on other sites More sharing options...
Dave1964 Posted November 24, 2013 Share Posted November 24, 2013 Hi James, Good question I to would be very interested in the rep once to this thread.Dave Link to comment Share on other sites More sharing options...
Dave1964 Posted November 24, 2013 Share Posted November 24, 2013 Oops sorry dodgy spell check,In the replies to this thread .Dave Link to comment Share on other sites More sharing options...
lensman57 Posted November 24, 2013 Share Posted November 24, 2013 What kind of magnitude stars can be picked up on a bog standard dslr sensor aat prime focus on a bog standard 80mm refractor on a tracking equatorial mount for say a:30 second exposure1 minute2 minute5 minute10 minute....Thanks for any replies.JamesHi James,Is it for focusing or imaging?A.G Link to comment Share on other sites More sharing options...
jambouk Posted November 24, 2013 Author Share Posted November 24, 2013 More for just interest. I was reading earlier and the author mentioned a comet that was magnitude +15, and i certainly don't plan to try and capture it, but i wondered what sort of magnitude object my dslr could pick up.James Link to comment Share on other sites More sharing options...
dph1nm Posted November 25, 2013 Share Posted November 25, 2013 Depends (critically - i.e. the answer can vary by several magnitudes) on how bright your sky is.NigelM Link to comment Share on other sites More sharing options...
lensman57 Posted November 25, 2013 Share Posted November 25, 2013 More for just interest.I was reading earlier and the author mentioned a comet that was magnitude +15, and i certainly don't plan to try and capture it, but i wondered what sort of magnitude object my dslr could pick up.JamesThe problem is not the exposure times but the size and type of the sensor, as the MAG 15 stars are relatively scarce the bright ones swamp the adjacent dim ones unless you really zoom in, a 5 minute exposure with any DSLR is just about the limit that the sensor can handle unless you have very dark skies and 9 out of 10 seeing.A.G Link to comment Share on other sites More sharing options...
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