The next level of improvement in optics will not be the glass or the currently used prism systems.

They will be electronically image stabilized like cameras. There is no place left to go with the alpha glass. The current construction and glass is at the apex of development.

I think it has been now for the last ten years. The improvements in coatings are all that is possible. However the image stabilized rangefinder market is going to be the next big advance.

Imagine 20-30 power handheld zoom image stabilized with a 2500 yard rangefinder.

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