Ackermann

10 лет назад

This video provides a tour of the Celestron Rowe-Ackermann Schmidt Astrograph, a telescope designed for wide-field astrophotography. The video highlights the telescope's features, including its fast aperture, large image circle, and high-quality optics, which make it ideal for capturing stunning deep-sky images. The video also demonstrates how to attach a DSLR or CCD camera to the telescope and provides insights into its functionality.

7 лет назад

This video explores the anatomy of an Ackerman pump-filled pen and its compatibility with various nibs. The presenter tests different nibs, including fountain pen nibs, dip pen nibs, and specialized Ackerman nibs, to see which ones fit and potentially work with the pen. The video concludes with a promise to test the compatibility of these nibs with ink in a future video.