One might consider the Ultravid 8x20 from Leica to be the ultimate, or consummate, compact binocular. They are in fact - without a doubt - one of the finest pocket-sized optics available.
The spectacular optical performance of this fine binocular starts with extremely high-quality roof prisms that are fine-tuned with phase-correcting P40 coatings and the High-Lux System. Each of the 6 lens elements are treated with HDC coatings, and the durable aluminum housing is filled with dry nitrogen and sealed for total water and fogproof performance. In a more user-friendly manner of speaking - your view will be crisp, clear, and full of rich details.