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Jay
Collimating the f4 will require more skill and effort than the f5, there’s no argument about that
I’ve used my Bintel 200mm f5 for over a year now and has plenty of light grab , can image magnitude 9 to 10 galaxies
I was awarded image of the month for April across Australia by Bintel using my Bintel 8” f5 newt
Image attached
Go for the f4 if are worried about a little bit of extra weight on your mount ( 2 kg ) but my recommendation as a beginner go for the f5 mate you won’t regret it
Cheers
Martin
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