Posted 13 March 2009 - 07:18 AM
EQ6 What would the PE no be.Thanks for any help.BOB
Posted 13 March 2009 - 12:25 PM
Be careful evaluating mounts PE based on a single example, especially for lower priced mounts where the QC can vary quite a bit. Watch out for ages of mounts in various comparisons, the link that Eric supplied being a good case in point. Older versions of many mounts have evolved over time, the vendors have made improvements as they've been sold. If you don't know the age of a mount in a comparison don't be too quick to dismiss it based on a large PE.
Watch for folks who have "upgraded" or "tuned" a particular example of a mount. You can usually reduce the PE of a mount just by taking it apart, re lubricating it, and carefully reassembling it (in automotive terms this is similar to "blueprinting" an engine).
Also take a close look at the type of PE. Large swings are one thing but a large amplitude PE that is very smooth (doesn't have any high frequency changes) is going to be much easier for an autoguider to handle than a mount with a lower amplitude PE but that also has a "rough" appearance (lots of sharp high frequency changes within the general graph).
Yes, there are a lot more things to think about than just comparing a couple of numbers.
Posted 13 March 2009 - 02:47 PM
Posted 13 March 2009 - 02:56 PM
On the first link, they have the AP mounts with the least. And the G11 came in very respectfully.
Posted 13 March 2009 - 06:44 PM