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tim53
sage
Reged: 12/17/04
Posts: 325
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Re: EM200 or NJP
07/20/08 02:36 AM
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I didn't think people were saying that any manufacturer was misstating the load capacity of their mounts - just that there are no standards and so the way they are reported differs, making it harder for the buyer to make an informed decision if they're concerned about the weight limits.
Also, I remain confused about the PE issue. It seems that all the graphs you've shown are taken with guiding turned on? Some smoothed and some not smoothed?
This is fine, so far as it goes. But you must know that such plots tell more about how well the guiding was set up and is working, and less about the precision of the mount. Right?
In the end, so long as any mount errors are corrected with guiding or PEC (or both), maybe it doesn't matter all that much how precise the drives are.
It's just fun to know. Like my account of using the AO-7 on my SBIG on a spur-gear driven C-8 above - so long as the AO was able to keep the star steady, it didn't matter a hoot that the drive is full of erratic errors.
-Tim.
--------------------
"We`re just waiting looking skyward as the days come down.
Someone promised there`d be answers, if we stayed around."
-Orchestral Maneuvers in the Dark, "The Romance of the Telescope"
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