Ballard wrote:
Hi Tradio
This image was made by stacking 24 images each 30 seconds long with the ISO set to 800. The lens used was a canon 70-200 F2.8 zoom lens set to 200mm and F2.8. (I accidently left image stabilization on which did add a small amount of distortion to stars on the right hand side of the image).
The 500 mm image I referenced was made by stacking 18 images each 30 seconds long also at ISO 800, however the F stop was 4.0 in that case.