Median total variance (red dots) and the median cosmic variance (cyan pentagons) as a function of the redshift bin size Δz for I₀ ≤ 24 (top panel) and I₀ ≤ 22.5 galaxies (bottom panel) at 0.2 ≤ z< 1. The dashed lines mark the total variance in the constant regime. The grey areas mark those bin sizes smaller than ⟨ δ_z ⟩, the ALHAMBRA photometric redshift precision, and 2 ⟨ δ_z ⟩.