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Hi Robin
I have found that the Tak EM200 on screen “Cross Hairs” are not accurate with all my astronomy applications; The Sky, Starry Night Pro and SkyTools. The difference between the “real position/target” and the “cross hairs” is generally off by a few arc seconds.
I think that this has something to do the how and what the EM200 encoders report as the RA and DEC positions – they are less accurate than the planetarium apps can report on hence I always find a small discrepancy and the cross hairs tend to jitter too.
I recall being surprised at this when I first used my EM200 several years ago, but a search of the Tak Yahoo Group indicated that this was normal and it has not bothered me since then for how I set up and the type of work that I do with the mount.
Cheers
Dennis
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