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Also, the new model lets you have the solar spectrom (difuse light, the direct light will saturate the detector) lets you observe the atmospheric absorption lines of O2, H2O. With much better sensitivity in the UV range.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.