space3

Thanks for the replys everyone, I will play with the distance between the reducer and chip and see what happens

im imaging with a celestron 925 and a Canon 6D, im getting really bad vignetting when using the Celestron focal reducer, I thought it maybe the full frame camera causing it, but I tried a crop sensor lastnight and Im getting the same result, It seems fine when I remove the reducer, so does anyone know is their something I can use to fix this, a different reducer of something else that will correct it, and let me still use the reducer Thanks Derek