Instruct: Classify the given review as either positive or negative.
Query: Broke after 2 uses and exit pupil too narrow

I've only used these twice and the 2nd time was star gazing and the focusing mechanism in the left lens stopped working without an apparent cause of damage. The small exit pupil diamater has always resulted in serious eye strain as well, making perfect alignment a requirement for getting any usable images.You get what you pay for.