Deep Sky Astrophotography with a Camera Lens (300mm)

Recommended Light Pollution Filter (L-Pro) ➡️ Using a Canon EF 300mm F/4L for Astrophotography Over the years, a lot of people have asked me why they should invest in a new telescope when they already own a high-quality telephoto camera lens with a comparable focal length. After all, a prime lens like the Canon EF 300mm F/4L USM isn’t cheap, and its got some seriously impressive optics. So, if you’ve already got a lens like this in your kit, you should definitely try using it for