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Sigma 150-600mm Contemporary + 1.4x extender vs Canon RF800mm F11

Started 3 months ago | Questions thread
BobKnDP Senior Member • Posts: 3,140
Re: Sigma 150-600mm Contemporary + 1.4x extender vs Canon RF800mm F11
4

Just curious: planetary photography?

At its closest, Jupiter is supposed to have an angular diameter of 46.9 arc seconds. With an 800mm lens, that would give an image diameter of 182 microns.

The R10 has a pixel pitch of 3.72 microns. That's less than 50 pixels across the image. It also ignores the reduced resolution associated with the Bayer mosaic color mask.

There are ways of getting a higher resolution by combining multiple images, but I'd think that a telescope would be a better way to go, even if its aperture is no larger than the nominal 73mm entrance pupil of the RF 800.

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