Need to make my zwo FF80 (f/7.5) refractor faster.
I use the 0.7x reducer that zwo recommends, but that gets me only upto f/5.7.
I am looking to make my scope f/5 or lesser. I know there are many 0.5x to 0.65x reducers in market, but am not sure what works well with zwo FF80. Any recommendations?
Please NOTE: FF80 refractor is a quadruplet, so it already has inbuilt flattener. So adding a Reducer+Flattener is not advisable, and am looking only for a Reducer.
zwo 2600mm is my imaging camera.
