images cut off by 15%
the simulated lens in Image ASW00036ry was cut off in the image presented on my screen. so i guess you will lose some 15 per cent of accuracy just because you didn't check the visual appearance of your page in all browsers carefully. this is on chromium on a 1080p screen.
I am sorry you are having trouble with part of the image being cut off - perhaps you could tweak your screen resolution settings?
Spacewarps was tested by volunteers, so I hope you appreciate that it is impossible for us to test it on all the various combinations of OS's / browsers / infrastructure / personalised settings etc...
By the way, Welcome to Spacewarps 😃