Aperture 3.5 Vs 2.8 Full Aperture F
Since this lens is a wide-angle lens with relatively slow full aperture f-number of f/3.5, large defocus. The next few f-stops in this sequence are:A cross section of the NIKKOR-H 2.8cm f/3.5. As an example, the aperture that is one-third stop smaller than f /2.8 is f /3.2, two-thirds smaller is f /3.5, and one whole stop smaller is f /4. Usually the full stops are marked, and the intermediate positions are clicked. Half-stop steps are used on some cameras.
Glyph Technologies External HD and SSD Sale at B&H — Save $80.00 - $300.00As the numbers rise, the aperture of the lens decreases to half its size with every stop. Canon f/3.5, Pentax f/3.5, Panagor f/2.8. The Panagor is significantly weaker, diffraction starts to kick in quite early in the center but the corners peak at f/11. Stopped down both lenses are excellent performers.
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