Kahles was founded in 1898 in Austria.
Zeiss was founded in 1846 in Germany.
Kahles Helia 3 4-12x44i and Zeiss Conquest V4 4-16x44 are Hunting Rifle Scope and Rifle Scope for Mountain Hunting and All-round Rifle Scopes.
Both Kahles and Zeiss make high-end optics.
Read Zeiss Conquest V4 4-16x44 Riflescope Review
Zeiss costs 1000€ and Kahles costs 1659€
Kahles has 485g and Zeiss has 640g in weight.
Kahles is shorter. It has 351mm in length and Zeiss has 356mm.
Zeiss has 30mm tube diameter, Kahles has only 25.4mm.
Kahles has fixed parallax at 100m and Zeiss has adjustable (side focus) 50m to infinity.
Minimal magnification of Kahles is 4x and Zeiss is 4x. Maximal is 12x at Kahles and 16x at Zeiss.
Zeiss has maximal field of view 9.5m/100m, while Kahles has 9.2m/100m. Zeiss has minimal field of view 2.4m/100m and Kahles has 3.3m/100m.
Both have 90mm eye relief.
Both have reticle in SFP.
Both have reticle illumination but Zeiss has illuminated dot only with reticle 60.
Central and edge sharpness
Great definition of dot
Field of view