|
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?
|