The Hatfield Photographic Lunar Atlas

SCT and Maksutov telescopes - which of course includes the best-selling models from Meade, Celestron, and other important manufacturers - reverse the visual image left for right, giving a "mirror image". This makes it extremely difficult to identify lunar features at the eyepiece of one of these instruments using conventional atlases, which show the Moon "upside-down" with south at the top.

In 2004, it became obvious that Henry Hatfield’s original atlas wasn’t suitable for all current commercially-made amateur telescopes. Newtonian telescopes and astronomical refractors – for many years the only choice for amateurs – invert the observed image. The standard Hatfield Atlas therefore follows the IAU (International Astronomical Union) convention of having maps (and photographs) with South at the top and West on the left: an inverted image.