<p><span class="h-card" translate="no"><a href="https://mastodon.social/@whitequark" class="u-url mention">@<span>whitequark</span></a></span> Nope. Images taken through NVGs are just "basic marketing information" and not controlled, tube vendors etc publish them all the time.</p><p>If you had a calibration chart of known contrast and angular size etc in view, that might be an issue. This image isn't remotely good enough for anyone to figure out performance of the tube from.</p>