Thread: ES 100 degree
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Old 27-02-2014, 04:22 PM
JJDOBBER79 (Jas)
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JJDOBBER79 is offline
 
Join Date: Jul 2013
Location: Perth, WA
Posts: 258
ES 100 degree

Hi all,
I have been having a look on various online stores for a ES 100 degree 20mm and I noticed that there was a big price variation. I found that there are 2 of these. 1 seems to be nitrogen purged and the other argon purged. Prices are US $299 for nitrogen and $399 for argon. What exactly is the difference and does it warrant paying an extra 100. I read that these are waterproof eyepieces so i presume dew resistant is more to the point (unless I want to use my scope underwater). Does anyone know if it is just a higher level of waterproofing or something visual?
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