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Hey.. So last night i went to a beach that had one side completely dark ,and the other filed with light pollution . In the dark side,the milky way gqlaxy was pretty obvious and the sky was full of stars. Andromeda was rising and i wanted to take a peak, however , it was low on the horizon and had a slight haze(skyglow).It wasn't visible with the naked eye and in my 10x50 binoculars i could just resolve the core.
I heard Andromeda would be visible with the naked eye as its mag 3.3. But the milkyway was and Andromeda wasnt.What went wrong?
I have just joined and have been looking around, and putting in various searches to find the answer to my question(s).
I have already found some valuable information, but i can't find a specific answer to a question i have relating to exposure times.
I have shot the milky way several times before, from a tripod and a wide angle lens. I am aware of and understand the "500 rule" and that worked fine for me at first when i was shooting with my Canon 6D Mark II. When i moved over to the Sony A7III i noticed significant trailing using the same rule and that led me to the NPF rule (Via the photopills app incase people dot know).
I am heading back to Tenerife once again in about 6 weeks time and want to buy a star tracker so i can get some really detailed images.
I have done a fair bit of research and in principle, the whole thing doesn't seem to be too daunting or difficult.
I have purchased the Polar Scope Align Pro app so i can align Polaris as accurately as possible, i will practise putting the unit together and familiarising myself with the different parts etc, but it is the exposure times that i do not understand.
My best glass is the Carl Ziess 50mm F/1.4 Planar, the 18mm F/2.8 Batis, the Sigma 35mm F/1.4 Art & the IRIX 15mm F/2.4 Blackstone.
I currently do not own, nor have i ever used a tracker, and I cannot find any information relating to which aperture, ISO and Shutter length any of these focal lengths should or could be shot at.
Is there anything similar to the 500 rule or NPF rule that relates to using a tracker with varied focal lengths? or is it just a case of stepping the lens down for sharpness and then trial and error?
Thanks in advance,
One of my favorite deep sky objects in the night sky, the great Andromeda galaxy.
All the processing has been done with Pixinsight. The scope was FSQ-85 with the good old unmodded Canon 6D. Around 5 hours of data with 5 minutes exposure.
Hope to add some short exposures to the core someday.