I don´t know so much about the picture quality but I used the Format function on my BEO4 to adjuste the picture size from BM5 on my BV 7-32.
Brgds Ingvar
Collector since 1996, BS5/BM5, BL3*4, BL11, BEO6, BV10-46, BL2000, MX4002, Beocom6000, Beotalk1200