How to photograph invisible part of the moon?

Started 4 months ago | Discussions thread
Tristimulus Veteran Member • Posts: 8,367
Re: 2400WS packs x 1,000,000

Jacques Cornell wrote:

and Fresnel lenses on all the heads.

Why?

Fresnell lenses are not quite up to the better traditional lenses and telescopes when it comes to astrophotography...

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