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Old 30-07-2019, 09:02 AM
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Merlin66 (Ken)
Spectroscopy Wizard

Merlin66 is offline
 
Join Date: Oct 2005
Location: St Leonards, Vic
Posts: 6,868
Long focus lenses - Surplus Shed

https://www.surplusshed.com/pages/item/L3920D.html

Surplus Shed have a special running at the moment on long focus lenses- 2500 to 4000+mm with apertures of 150mm.
These sound ideal for anyone considering building a spectrohelioscope.
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