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Photography Question 
Lisa Carpenter
BetterPhoto Member Since: 9/8/2004

Is an f2.8 lens much better than an f4?

I just purchased the Canon 20D? I am looking into some lenses. I have a couple lenses and they are really good. Is it worth it to invest in a couple f2.8 lenses? The 24-70mm f2.8 and 16-35mm f2.8 to be exact???

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11/22/2004 3:38:22 PM

Tony Sweet
Tony's Photo Courses:
2-Week Short Course: A Quick Start to Adding More 'Pop' to Your Images
  Basically, f/2.8 gives you brighter viewing and with very long lenses, allows you to get that really soft background at a long distance, best known is sports photography, who almost always shoot wide open. That's why they all use those 500 and 600mm f/4 lenses. With wide angle lenses, this is almost a non issue, since these lenses are used for depth of field and are almost always shot at f/22. A wide angle f/2.8 lens will be more expensive and brighter viewing, but you will probably never use the f/2.8 setting. BUT, the really good thing about wide angle f/2.8 ZOOM lenses, is that the f/2.8 doesn't change when you zoom in or out. With veri-focal zooms, where the zoom may go from f/4 at 24mm to f/5.6 at 70mm, you're constantly remetering. Bottom line, get the fastest lenses you can afford, but speed is much more critical with telephoto lenses.

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11/23/2004 5:36:47 AM

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