Steve,
Thanks! PixInsight counted approximately 43,000 stars. I'm just glad I didn't have to count them.
Zocky,
Just for grins, I solved a single plate using Maxim DL. It computed a focal length of 90mm. This jogged my memory too. The lens was a Pentax 67 90mm f/2.8 stopped down to f/4.5. Keep in mind, the image was completely processed in PixInsight.
Wade