The aperture of the telescope is 102mm which means i have 1000mm to reach objects in the sky. I shot the moon at 6pm while the sun was still high in the sky, that's why I used 1/200. I have a 75-300mm lens, and shooting at 300mm doesn't let you come close to the moon so i am not sure if you can have a nice photo of the moon with 200mm, BUT... you can use those 2.8 to do deep sky photography