Picky eye relief can be a symptom of magnification and budget design. Glass might seem clear but the eye relief issue can cause eye strain. Not a god thing. You will get fatigued during extended shooting sessions.

Another plug for Nightforce. However the Sightron SIII are one of the best values out there. The Sightron SII Big Sky is also a great optic for its class. I suggest that if you buy a used Sightron to check the serial number for manufacture date. The newer scopes are superior to their older optics in the SIII line.