Examples of fits to the major-axis surface brightness profiles of LeMMINGs galaxies. Left-hand panel: the core-Sérsic model fit to the major-axis HST WFPC2 F814W-band light profile (black dots) of the elliptical LeMMINGs galaxy NGC 3348 (orange solid curve). The ellipticity (ϵ), position angle (PA), and B4 profiles, along with the residual profile and rms residual (Δ ∼ 0.023 mag arcsec⁻²) for this massive core-Sérsic galaxy are also shown. Middle panel: composite (HST ACS+SDSS), F814W-band surface brightness, ϵ, PA, and B4 profiles of the doubled-barred lenticular LeMMINGs galaxy NGC 2859. The SDSS i-band data are zero-pointed to the HST F814W-band profile. Six-component decomposition of the galaxy major-axis surface brightness profile (black dots) into a nuclear component, a bulge, an inner bar, and three outer galaxy components (bar+ring+disc) are denoted by various broken curves which are summed up to the final model (orange solid curve) that describes the galaxy. The stellar light distribution of the nuclear component (which we tentatively identify as AGN, see Baldi et al. 2018, 2021a) is modelled with a two-parameter Gaussian function and dominated by the Sérsic (n ∼ 3.6) bulge. The inner and outer bars are described using two Sérsic models each with n ∼ 0.2. The outer, extended exponential disc is the dotted blue curve. The three-parameter Gaussian ring model (cyan dot-dashed curve) describes the outer ring. The two bars and the large-scale ring are accompanied by three local maxima in ϵ and B₄ and twists in PA. Each model component is convolved with a Gaussian PSF. The residual profile along with the small rms residual Δ ∼ 0.047 mag arcsec⁻². We fit six model components which are summed up to a full model with 16 free parameters. Right-hand panel: SDSS image of NGC 2859. The top and bottom insets show the surface brightness contours of the galaxy’s SDSS and HST ACS images, respectively. North is up and east is to the left.