Many a telescope owner, after gazing at the sky for a while, wants more; wants to share what she or he is seeing. There are several ways to achieve this. The most obvious is shooting through the telescope eyepiece with a small camera or cell phone.…
The Crayford telescope focuser design – developed in 1971 by John Wall and named after the Crayford Manor House astronomical society – has a number of important advantages over rack-and pinion and can be home built out of wood by almost anybody with a bit of patience and the right tools at hand. I designed this focuser specifically to carry the weight of a Nikon D7100 camera on prime focus (± 800 gr), which is considerably heavier than even the largest eyepieces. So far, it is holding up admirably.
With the D700 now being fazed-out, semi-pros and advanced amateurs are left with two full-frame cameras to choose from in Nikon’s mid-range price bracket, the D800E and D800 costing $ 3.300 and $ 3.000 respectively, while the D600 will set you back $ 2.100, a premium of $ 400 over the aging D300S APS-C camera. Even in the absence of independent tests of the D600, it is interesting to compare it against the D800, to figure out how much more camera $ 900 buys us, and ask ourselves if it is worth spending the roughly 50% extra.
Nikon has spent many years contributing to NASA's study of space through the development and manufacture of advanced cameras and Nikkor lenses, starting with the F1 Photomic FTN, carried aboard the Apollo 15 in 1971.