Limiting Magnitudes and Separations for Various Apertures

It is extremely difficult to give definite values for limiting magnitudes, because so much must depend upon individual observers. The following table must be regarded as approximate only. The third column refers to stars of equal brilliancy and of about the sixth magnitude. Where the components are unequal, the double will naturally be a more difficult object, particularly if one star is much brighter than the other.

Aperture of object Faintest magnitude Smallest separation glass in inches seconds of arc

8 10 12 15

10.5

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Digital Camera and Digital Photography

Digital Camera and Digital Photography

Compared to film cameras, digital cameras are easy to use, fun and extremely versatile. Every day there’s more features being designed. Whether you have the cheapest model or a high end model, digital cameras can do an endless number of things. Let’s look at how to get the most out of your digital camera.

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