Abstract. While an enormous amount of new data at UV-optical and IR-mm wavelengths have been recently obtained, presence of intensive foreground emission makes any direct measurements of extragalactic background light (EBL) extremely difficult. Since it is well known that very high energy photons from extragalactic sources are expected to suffer absorption from interactions (γ_VHE;+γ_EBL = > e⁺+e^-) withextragalactic background light (EBL), the energy and redshift dependent opacity causes a deformation of the observed VHE spectrum, which depends on the spectral energy distribution (SED) of the EBL. In this work, we present estimates of optical depth as a function of redshift and primary photon energy for various EBL models. Compatibility of the EBL models with sub-TeV observations of extragalactic sources using Cherenkov imaging telescopes, will also be presented here. The observational data of 3C279 from the MAGIC collaboration, collected during 22-23 February 2006, will also be critically examined for constraining the intergalactic low energy photon spectra.