astwen

Hi, does anyone use the ZWO tilt adapter to compensate the tilt of Samyang 135? Using the image inspector in ASTAP, the tilt (FHD) of my Samyang 135 in Sony A7III and ASI533 pro are 1.1 & 0.8 respectively. I just wondering if the tilt is caused by the different focus points on the lens/sensor, is it possible to adjust it by the tilt adapter? My local seller said they can send the lens to Korea for repair, but it takes 3 months and I doubt Samyang cannot fix it. Actually I do find the unrounded stars in the image, however, I cannot find noticeable differences in the four corners at infinity during the daytime (wide opened). If the tilt adapter cannot help, I may just sell the lens to people who do not take astrophotography...