The Konus Newzoom 7-21x40mm Binoculars have garnered a variety of user feedback, highlighting several key aspects.

Positive Feedback:

1. Versatility: Users appreciate the zoom functionality, allowing for a range of magnifications from 7x to 21x. This feature is particularly praised for its flexibility, making the binoculars suitable for both wide panoramic views and detailed close-ups.
2. Build Quality: The binoculars are noted for their robust construction. The rubber armor ensures durability and provides a secure grip, which is beneficial for outdoor use.
3. Value for Money: Many users find these binoculars to offer good value for their price. The optical quality is considered decent, providing clear images for general use.

Areas for Improvement:

1. Optical Performance: While the binoculars are adequate for general viewing, some users have pointed out that the optical quality can suffer at higher magnifications, with images becoming less sharp and more prone to chromatic aberration.
2. Weight and Portability: At approximately 28.3 ounces, the binoculars are on the heavier side, which might cause fatigue during extended use without support.
3. Lack of Advanced Features: The binoculars are not waterproof, which limits their usability in adverse weather conditions. Additionally, the lenses are only coated rather than fully multi-coated, which can affect image brightness and clarity in low-light situations​.

Overall, the Konus Newzoom 7-21x40mm Binoculars are well-regarded for their versatility and durability, making them a good choice for casual users and those seeking a budget-friendly option with zoom capabilities. However, for more demanding applications or extended use, potential buyers might need to consider some of the limitations regarding optical performance and lack of waterproofing.