Hello,
I thought that I would try imaging earlier this morning, around 8:45am to see if the more even temperatures would improve the seeing. If there was a difference, I was unable to see it as the effect was swamped by the wobbles of the Sun being at a low altitude.
I also tried the other 2 filters I have acquired over the years, a Lumicon UHC and an Astronomik IR Pro 807 but the results were disappointing, with very low contrast, washed out images.
I returned to the trusted Baader IR blocker as recommended by Erwin, and that gave the most visually pleasing image. Here is an image with 2 alignment points, guess where they were?
17 and 15 frames from an 1800 frame avi. C9.25 prime focus. 1/500 sec at 5fps.
Cheers
Dennis