I noticed the AG calculator V.4.02 gives me different results than the CCDAP3 AG calculator. CCDAP3 says for a image scale of 1.87 AS/pixel with allowable error of 1.4 AS/pixel my minimum move should be 0.19 sec. The AG calculator on the Ccdware website gives me a result of 0.047 seconds. Which one is correct? My guide rate is 1.0x.

Hi Chris,

The web site is correct. There is an error in CCDAP3 that was corrected in CCDAP4. Version 3 users should use the web site.