The Oberwerk 70XL-SD 70mm APO SD Giant Binocular (SKU: 70XL-SD) is the most compact model in the premium SD lineup, featuring high-performance FCD100 SD apochromatic objectives. Designed to deliver exceptional image quality in a lightweight and portable format, it combines outstanding chromatic correction with a robust magnesium-alloy body that is waterproof and nitrogen-filled for full outdoor reliability.
 
With a 390 mm focal length, the binocular includes Oberwerk’s top-tier 14 mm, 8-element eyepieces with a 70° apparent field, providing 28× magnification and a 2.5° true field of view. The 18 mm eye relief and 2.5 mm exit pupil ensure excellent viewing comfort, including for eyeglass wearers. Optional 7 mm eyepieces allow magnification up to 56× while preserving APO-level optical performance.
 
Weighing only 3.85 kg, the 70XL-SD is ideal for observers seeking premium SD APO optics in a compact and easily transportable giant binocular. The 50–80 mm IPD adjustment makes it suitable even for younger users.

Key features

• 70 mm FCD100 SD apochromatic lenses with excellent chromatic correction
• lightweight magnesium-alloy body, fully waterproof and nitrogen-filled
• extendable lens hoods for improved contrast
• top handle with Picatinny rail for finders or laser pointers
• elegant “Luna Pearl” pearl-white finish with gold anodized accents
• precision collimation certified up to 98× (<12 arcsec)
• includes 14 mm 70° AFOV eyepieces (28×)
• supports optional 7 mm eyepieces (56×)
• heavy-duty transport case included
• 5-year limited warranty

Technical specifications

• objective lenses: 70 mm FCD100 APO SD
• focal length: 390 mm
• standard magnification: 28× (14 mm eyepieces)
• recommended maximum magnification: 56× (7 mm eyepieces)
• true field of view: 2.5°
• apparent field of view (AFOV): 70°
• exit pupil: 2.5 mm
• eye relief: 18 mm
• minimum focusing distance: 25 m
• interpupillary distance: 50–80 mm
• binocular weight: 3.85 kg
• weight with case: 11.8 kg
• case dimensions: 30 × 21 × 9 cm
• construction: waterproof, nitrogen-filled magnesium alloy
• focusers: 1.25″ helical focusers

Included accessories

• Oberwerk 70XL-SD binocular
• pair of 14 mm 70° AFOV eyepieces (28×)
• hard transport case
• objective and eyepiece caps