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Old 30-07-2019, 08:02 AM
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Merlin66 (Ken)
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Join Date: Oct 2005
Location: Junortoun Vic
Posts: 8,904
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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