Don't Buy the Sigma 14mm f/1.8 for Astrophotography: How to Get Better Photos for Less Money

I’ve seen a lot of posts and comments raving about how f/1.8 on a 14mm lens is revolutionary for anyone wanting to shoot astrophotography. Yes, having a larger aperture will collect more light, but you’re still limited in the exposure length because of the Earth’s rotation. To counteract that, you can get something called a […]