quick lunt 60mm question
quick lunt 60mm question
the natural focal length of lunt 60 objective lens is 250 or 300mm? (10 or 12 inch)??
- Merlin66
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Re: quick lunt 60mm question
According to our measures - when doing the early Lunt 60 mod - it was 275mm focal length.
(There's more info in the mod section....)
(There's more info in the mod section....)
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"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer
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