Fig. 01 Vertically adjustable flip-up loupes enable the steepest declination angle (45 degrees shown).
Fig. 02 These TTL Loupes were promised to have a 40-degree declination angle, but were actually only 20 degrees.
Fig. 03 Vertically adjustable flip-up loupes can be adjusted as steeply as needed, easily providing a safe head posture.
Fig. 04 A vertical slide feature ensures that the scope sits low enough in relation to the pupil to maximize declination angle.