Photometric comparison of KV450 stellar photometry in each of the ZYJHK_s-bands to photometry from SDSS (for our Z-band only, shown as a solid line), and 2MASS in the ZYJHK_s-bands. We note that as 2MASS does not cover the ZY-bands, comparisons there are made using an extrapolation based on the 2MASS J–H colour, as described in González-Fernández et al. (2018); these are shown here as dashed lines in the ZY comparison panels. We simultaneously fit these distributions with a single component Gaussian (blue), with the optimised fit parameters annotated. With the exception of the Y-band extrapolation (which has a 0.02 mag residual), all directly comparable fluxes are in perfect agreement.