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Old 16-07-2009, 04:47 PM
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rat156
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Join Date: Aug 2005
Location: Melbourne
Posts: 1,696
These look nice on the surface except for a couple of things.

The 14" scope is f/11, the smaller scopes are f/10. Really for deep sky imaging they need to be faster, f/6 to f/8 would be good.

As a planetary scope the 14" looks like it could be really good, but then who really cares about a super flat field for planetary imaging?

I assume that the "other brand" is the Meade ACF, to be honest I haven't seen that bad edge of field stars on any of the ACF scopes I have looked through, but perhaps someone who has one can drop a DSLR in it and see if the off-axis stars are really donuts.

It also has (I think) a field flattener built into the tube. This may mean that it has a limited backfocus.

This is why I really like the RCX design, f/8, no field flattener, fixed primary mirror etc. Meade should really fix the focusser problems on that design and relaunch it.

Cheers
Stuart
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