Hi all As christmas is just around the corner my wife asked what i needed. Well one item ive been meaning to find answers to is which size focal reducer best suites the Skywatch Skymax 180 Pro f/15. I need something to be able to reduce the focal lenght so i can capture the Pleiades M45 etc . The last time and first time i tried to capture this i couldnt get the whole cluters in view. I'm hope one of these reducers will do the job.? I hope someone can give me the answer as ive no idea.? Thanks in advance.. Andy