The Steinheil triplets are made of a low index crown element cemented in between two identical meniscus flint elements. Specially designed for 1:1 conjugation, they perform well for conjugate ratios up to 5.
These lenses make good relay optics for both on- and off-axis application and are often used as eyepieces.
||+0.00 / -0.10
||0.25 x 45°
||CA >= 90% of Diameter
||1/4wave MgF2 @ 550nm (See Coating Chart for Available Options)
|Focal Length Tolerance
|* All dimensions are in mm