Understanding Focal Length: Trading Speed for Detail

Описание: A telescope with a long focal length and slow F ratio gives you just as much light energy in the image as a short focal length telescope with a fast F ratio. The long focal length telescope just trades off some speed for detail. And if you aren't confused yet, just remember: It's all about how they spread the butter.

*** *** ***

Check out a portfolio of astro imagery shot from the Sky Story Observatory at Astrobin: https://www.astrobin.com/users/SkyStory/

We are Telescope Canada's first affiliate. It's a great place for astrophotography gear with fast service and an informed staff who are passionate about astrophotography. Using the following link adds nothing to your cost but helps us produce more educational videos about this amazing universe around us. Just copy and paste the link into your browser: https://telescopescanada.ca?bg_ref=KK...

All videos best viewed in 4K.

Peer into the cosmos on Sky Story and along the way come to appreciate our world all the more. Here, we explore the realm of nature beyond our Earth through the fields of astronomy and astrophotography.

All our programs are committed to the standards of scientifically accurate, high quality content that aims to educate and inspire. New videos are posted almost weekly, so please subscribe.

#astronomy #astrophotography #space #nebula #stars