Hello DoubleUp. I sent your reply to a friend who is a great specialist in lens riflescopes, rifles, calibrations, settings and long range shooting. He saw the photos of 454shooter, he also read my comment. He really appreciated your answer. In practice, he implicitly agreed with you and wrong with me. I write you his original answer in Italian and also translated into English with Google translator
Sicuramente, DoubleUp ha ragione comunque.....
Non essendoci lenti, con immagine video proiettata , cambia poco. I cannocchiali devono far sì che si mantenga la stessa distanza e devono essere ben centrati per evitare errori di parallasse. Con il display del visore termico non è necessario...Se 454shooter è comodo così... ha fatto bene !
Surely, DoubleUp is right anyway .....
Since there are no lenses and with a projected video image, it changes little. The scopes must ensure that the same distance is maintained and must be well centered to avoid parallax errors. With the thermal riflescope display it is not necessary ... If the 454shooter is so comfortable ... it did well!