I've been looking at the Eagle Optics 10x42 Ranger, but see there's a new version 10x42 ED and also an Atlas Optics Intrepid 10x42 ED. Can you tell me what the ED class adds to the binoculars, and if the Atlas Optics ED is the same as the Eagle Optics?
The ED classification refers to the glass that is used in the binoculars. It’s an extra-low dispersion (ED) glass that significantly reduces the amount of chromatic aberration and provides a sharper image.
The Intrepid ED uses the same glass and coatings as the Ranger ED and so has the same optical quality. The difference is in the mechanical features and overall build quality and durability. The Ranger is a better constructed binocular and will hold up to wear and tear over time better than the Intrepid ED.
Both have better optics though then the original Ranger. I hope that was helpful, and please let me know if you have any other questions.