I'm trying to experiment and shoot a long enough exposure of the sky to get the stars blurred all the way across the image. I'm thinking I would need a 4 to 5 hour exposure to do it correctly at ISO 50. If i step the ISO up higher then I would assume noise would increase so thats why I thought I'd use ISO 50.


Daniel I don't understand what you mean by dark frame. Also when I shot my 1 hour exposure I only got a partial blurring of the sky but I did capture 3 falling stars that was kind of neat. I'm guessing that I'm probably going to need a 3 hr exposure to get what I need. That means I will need 6 hours of total time to let the camera sit and finish the image so that I can view the final product.


I don't have the extra money in the budget at the time to buy additional software like DXO, Noise Ninja or even Adobe Lightroom. Looks like I'm stuck with the in camera setting or to use DPP but I don't want to find out later after the fact that the in camera setting was the better option. Don't want to do the image twice which could mean 9 hours.