The manual is a bit vague on this point. Is the serial cable for the ST-4 -> computer straight through or null modem? I can't find an answer on the SBIG web site (other than "use our cable.") Gene Horr genehorr@houston.rr.com _______________________________________________ Astro-Photo mailing list Astro-Photo@seds.org http://seds.org/mailman/listinfo/astro-photo