It will go on a WO FLT132 at the native focal length of F7 and the camera will be close to the filters. I will give it a go I reckon and if I need to upgrade the filters I can do so at a later stage. Thanks.
The next question would be, do I need the Pro version or the Photo version?
It seems there are some technical differences between them although the Photo version seems adequate for amatures not doing research.