ESPaDOnS optical spectrum of RU Lup on the night of 17 June 2011. This spectrum is overlaid with the photometry measured from the ANDICAM observations of the same night. The circles represent the aperture photometry taken in the B, V, R and I bands and the triangles represent the synthetic photometry calculated by convolving the spectrum with the transmission response of ANDICAM in each band. For the B and V bands the triangles and circles are overlapping.