Confusion at the Border: Photography Versus Astronomy

One of the biggest confusions that you might notice as you venture into astrophotography is that photographers and astronomers measure their equipment differently. Photographers tend to refer to their lenses in terms of their focal length, while astronomers refer to their telescopes by the diameter of their opening. Thus, a 75mm f/6 telescope has a focal length of 450mm. Meanwhile, a 75mm camera lens at f/6 has an aperture of 12.5mm. If a photographer is told that someone is shooting a 155mm lens hand-held, it would not raise an eyebrow, but an astronomer told the same thing would be incredulous! I can only barely lift my 155mm telescope onto its mount!

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Instead of Praising Nikon, We Should Be Asking Why the Industry Has Been So Slow To Replace GPS With GNSS

The recent press about an upcoming Nikon camera — denoted the “N2014” — highlighted a government registration filing that suggests it will be “equipped with Wi-Fi, Bluetooth, and Global Navigation Satellite System (GNSS).” This has been a positive media development for Nikon as, if correct, it would make them the first camera manufacturer to integrate GNSS into one of their products. Is the camera industry being disingenuous by their slow adoption of existing technologies?

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