I'm using the LUXUN spotting scope for gun range practice. I've found that the minimum distance for focusing on my targets is 12 yards and it works equally well at 100 yards for me. I'm using the provided benchtop tripod. The scope stays in focus as use the fine adjustment knobs on the tripod to move vertically and horizontally to each of the five target areas during practice and matches. The image is bright and clear, and I can see each individual impact on the target.
This is a great buy for the price. Very clear optics and the phone mount option is exceptional. I had a slight problem that was outside of the company's control (l feel) but they were super fast in correcting the issue above and beyond my satisfaction. l will probably buy more of these for friends and family just because of the product's great customer service and performance.