Explore Scientific Coma Corrector
Monday, 6 July 2020 | Robert
I have owned a 200mm f/4 imaging Newtonian for some years but it never quite performed to expectations as I could never entirely eliminate coma in the frame edges. Reluctantly, I came to the conclusion that the stock corrector was inadequate and decided to purchase the ES unit based on a published comparative review. Having test run the corrector I can say that the stars are now sharp to the edges. A small amount of fettling is still required but I am confident that this corrector will deliver great results.