• Canon DSLR Cameras

  Fast lenses comparison

  Posted by Eski Eskesen on September 2, 2011 at 6:39 pm

  I have a 550d camera which I bought to do video.
  Before I always used some camcorders so didn’t have to think about anything like focus, aperture and stuff like that.

  Now I have to think about stuff like this, so my question is about difference of aperture of lenses.

  I need to film a lot without any extra lights so I have always been told that the best way is to get a fast lens, meaning a lens with a low F stop. Now I have a EFS 17-55 F2.8 lens which is awesome.

  So, having this lens will help me shoot in low lighted situation, but I would need to use it in F2.8 then, and the DOF is more there, so very hard to focus on a moving thing.

  So the bottom line and the question is.

  Is a lens with lower aperture better light up in higher F stop.
  For example:

  50mm F1.8 recording at F8
  VS
  18-55 F3.5 – 5.6 recording at F8

  Is the faster lens letting more light in or ?

  Hopefully you guys understand this question.. 🙂

  Eski Eskesen replied 14 years, 10 months ago 1 Member · 0 Replies
• 0 Replies

Reply to this Discussion! Login or Sign Up