Re: [APML] Beep on ST4

[Gene Horr <genehorr@texas.net>]

Matt BenDaniel wrote:

> Restarting the ST-4 tracking during an exposure can create a problem if you don't do
> it exactly right. The guide star may jump to another position on the ST-4 chip. That
> can lead to oval stars.

I mistated what I meant.  I meant to imply restarting the entire exposure.  But
some good came out of this.  Otherwise I would not have learned about:

> The way to do it is to hold the MODE button down when you restart tracking (which
> AFAIK is an undocumented feature). This tells the ST-4 to replace the guide star
> exactly back where it started. But you have to do just right. I think you release the
> MODE button once you see the little red dot on the LED display. It's so tricky that
> I'm reluctant to do it, even though I've done it successfully on several occasions.

Wow!  Thanks for this tip.  I did had no idea that this function was available.

Gene Horr
genehorr@texas.net

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