mark clements
New member
On Opticron's website, in the tech specs for eyepiece, it lists EPTA.
Can someone tell me what this is, and it's significance please?
Google and other searces go all over the place, or to the figures in the tech specs, but I can find no definition.
Thank you,
Harry
Can someone tell me what this is, and it's significance please?
Google and other searces go all over the place, or to the figures in the tech specs, but I can find no definition.
Thank you,
Harry