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GSO sell there 8in. and F/4 and F/5 on a Skyview / EQ3. Really this is at the max. for those mounts - but to be really honest they are undermounted esp. the F/5. I used a 8in. F/4 on the Skyview / EQ3 mount for 2 years for visual and it 'worked' but was at the limit.
An EQ5 would be OK for both F/4 and F/5 visually.
I have used a GSO 8in. F/5 on my HEQ5 and that works very well esp. for visual. One club member has a GSO 10in. F/5 on their HEQ5 for visual only. That is at the max. for that mount - it 'works' but dampening takes 7-10 seconds.
I have my ED120 Equinox with a finder and binoviewer plus a WO 66ED with 2in. accessories on both OTA's on my HEQ5 - which is slightly more weight then a 8in. F/5 but and it tracks very well.
Balance of course is important and strong air currents will also ruin your night.
Chris
Last edited by chris lewis; 04-06-2010 at 08:39 AM.
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