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Flare is one area where diffractive elements could have a negative effect, but by facing the diffraction gratings against each other, Canon seems ... just -0.3 EV. An 800mm lens is difficult ...

In this section you'll find photographic features that explore holidays and photography courses, details about members meetings, trials and tribulations of installing new software along with ...

There are so many EF lenses out there that this ... super telephoto zooms top out at 600mm, Canon takes things a step further, offering a mighty 800mm. Its aperture value of f/9 at the long ...