I noticed this effect out at Duckadang. I had imaged M31 with my WO72 FD and with the 135mm. The 72 image was fine while the 135 showed the halos. At first I thought it might have been smoke haze causing the issue, but I shot a few images on the 135 night and no matter their altitude they all showed a similar halo. I was starting to think there was something wrong with the lens. This issues is particularly problematic in dense starfields, eg Nth American Neb/Deneb area and inner tail of Scorpius. I was planning on shooting the same area (M31) with my 85 f/1.8 (admittedly not an L lens) to see if it produced the same effect as the 135. I'll still do it, but at least now I won't be so concerned with the lens.
