ZWO 290MM reflections when I use barlow lens in my Coronado

shadowchaser

Hi!!!

I recently changed my Coronado Solarmax II 60mm for a Coronado Solarmax II 90mm BF15. When I capture images with my ASI 290MM placed directly on the diagonal, I have no problems. But when I use a barlow lens or an extender, a reflection appears and I cannot remove it. What can cause this problem? I tested with a Barlox Cemax 2X, with a 2.5X Powermate and with a Explore Scientific 3X. With these same accessories and my Solarmax 60 I had no problems.

katherine.tsai

Hi Sir,

Since the refelections appears after the Barlow was added, so I recommend you check the barlow lens.