I sent my Blocking filter to Lunt for a 12mm upgrade. The results were incredible. I had very bad newton ring problems. They are now gone, and my tilt adapter not needed with my ASI 120mm. I also am able to focal reduce down to a full disk with the ASI120mm below are the results. I am not sure why Lunt would even sell a BF600 blocking filter. With eyepieces the scope works much better. The vignetting was horrible with the BF600. Anyway. Below are some quick full disk images. Straight off AS2! convulsion and layered in PS.
One is an negative disk, the other I tried to apply a positive disk with black background... tougher than I thought it would be. Anyway I hope to geta good time lapse of the eclipse.