Réducteur plein format Askar 2,5" F/3,9 pour FRA400 (RFRA400/ASKAR7256RD)
ASKAR7256RD
Réducteur plein format Askar 2,5" F/3,9 pour FRA400 (RFRA400/ASKAR7256RD)
ASKAR7256RD
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Description du produit
Askar fournit un tout nouveau réducteur plein format F/3.9 pour l'astrographe FRA400, réduisant encore la distance focale et raccourcissant ainsi le temps d'exposition sur sa base de conception originale de 400 focales et de rapport focal f/5.6. Le facteur de réduction est de 0,7 × et la distance focale réduite est de 280 mm, ce qui peut satisfaire la plupart des astrophotographies du ciel profond. La mise au point arrière est standard de 55 mm. Le réducteur a un filetage M48 × 0,75 intégré, permettant la fixation de filtres de 2".
Ce réducteur fonctionne également avec le FRA500