This T-Ring (T2) attaches to Nikon cameras

The Bahtinov mask in astrophotography is very useful as it allows you to understand when the ideal focus for the instrument has been reached.

The Bahtinov mask in astrophotography is very useful as it allows you to understand when the ideal focus for the instrument has been reached.

Artesky introduces the new line of APO ED refractors, the new 102mm doublet with 2 element objective, the first is a FCD1-B Ohara (Japan) element while the second is a Lanthanum element. It is possible to reduce it with a factor of 0.8x and bring it to a focal length of 570mm with factor F/5.6 or use it at full focal length with the 1x variable field flattener.

This corrector is optimized for the Artesky APO102EDF7 refractor, however it can also be adapted to other refractors up to focal lengths of F/7.5 by changing the backfocus distance. It returns excellent images even with very large sensors without issues; backfocus from the T2 thread is 55mm for the 102mm F/7.0 model. You can connect a 2" filter in front of the corrector.

Artesky introduces the new line of APO ED refractors, the new 80mm doublet with 2 element objective, the first is a FCD1-B Ohara (Japan) element while the second is a Lanthanum element. It is possible to reduce it with a factor of 0.8x and bring it to a focal length of 450mm with factor F/5.6 or use it at full focal length with the 1x variable field flattener.