Hello,
@Djakar
j'ai ça pour la Lunette, et si je m'en sort avec le C8, je prendrai le même au diamètre correspondant
https://www.pierro-astro.com/materiel-a ... 4mm_detail
Au passage, pour l'histoire de la MAP dans un sens sur Celestron. Je te rejoins.
La notice "Celestron" du réducteur 6.3, spécifie de faire la MAP en trigonométrique/anti-horaire, le plus précisément possible au centre de l'image numérique puis continuer à tourner de 1/24 de tour toujours en trigonométrique/anti-horaire...
"
Although the Reducer/Corrector Lens diminishes the
small amount of field curvature common to all
Schmidt Cassegrain telescopes, it does not completely
eliminate it. For low power visual use, the sharpest
possible images across the majority of the field is
obtained by first focusing on the stars at the center of
the field. Make sure you come into sharp focus by
turning the focus knob counterclockwise. Once sharp,
turn the focus knob approximately 1/12th of a turn
counterclockwise.
For optimum photographic focus, obtain the
sharpest
possible focus in the center of DSLR view finder. Make
sure you come into sharp focus
by turning the focus
knob counterclockwise. Once the image at the center is
sharp,
rotate the focus knob 1/24th of a turn
counterclockwise."