![]() ![]() ![]() The widest focal length of this lens has an f/4 aperture available, while the telephoto end opens only to a 1-stop-narrower f/5.6. Here are f-stop examples in full-stop variations, wide (bright/fast) to narrow (dark/slow) from left to right:į/1.4 | f/2.0 | f/2.8 | f/4.0 | f/5.6 | f/8 | f/11 | f/16Ī one-stop difference represents a 1/2x or 2x difference in the amount of light transmitted, and a one-stop change is a big deal.īecause the maximum opening of some lenses does not increase enough with focal length increase to maintain the same maximum aperture ratio, they have a variable max aperture referenced like f/4-5.6. The number following the "f" in the lens model name refers to the maximum measurement ratio the lens can create. The aperture value (f-stop) is the ratio of the focal length to the diameter of the entrance pupil. Just Posted: Initial Canon RF 24-50mm F4.5-6.3 IS STM Lens ReviewĪn important question to ask when selecting a lens for purchase or for a shoot is: "What is the maximum aperture opening I need?".Should I upgrade to the Sony a7R V from the a7R IV or IVA?.Sigma 60-600mm F4.5-6.3 DG DN OS Sports Lens In Stock.In Today's B&H Deal Zone: Sigma 12-24mm f/4 DG HSM Art Lenses (for Canon or Nikon) – Only $999.00 (Save $600.00), More!.Big Used Gear Inventory Update at B&H: Long List of Canon RF Lenses, Including RF 28-70 EOS R5 Starting at $2,588.95.Canon Instant Savings Promotion Ends on Sun, Feb 26 at 11:59 PM EST.The Look – Elk Pursuit in Rocky Mountain National Park – Join Me This Year!. ![]()
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