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6'' vs 8'' dome

Started Feb 28, 2022 | Discussions thread
Barmaglot_07 Contributing Member • Posts: 633
Re: 6'' vs 8'' dome

stillviking wrote:

I read the important in distance between lens and dome is to the lens be very close to dome acrylic, almost touching, correct?

No, quite the opposite. The lenses entrance pupil must be as close as possible to the dome's geometric center. The purpose of the dome is to have all light entering the lens pass through the water/glass/air boundary at an angle as close to perpendicular as possible, minimizing refraction.

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