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falken

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  1. Yup! Back focus at f2 is a nightmare... I’ll pass on the Samyang. The main advantage of the Redcat is that it has a helical focuser. Helical focuser eliminates the problem with flex and tilt on the focuser.
  2. Thanks @Elp The Canon version of the Samyang 135mm allow EFW to be used but not in combination with OAG. 135mm is to wide and I hate dealing with backfocus at fast focal ratios.
  3. Looking at an wide field imaging scope for my ASI1600 with EFW. I’m debating between Askar FRA300 and WO Redcat 51. Whats your opinion? Thanks.
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