Unfortunately, it is.
Digital cameras use alkaline batteries at a shockingly fast rate.
Alkaline batteries were not designed to meet the very high power demands of today's electronic devices. Alkaline batteries have a high rated capacity, but they can only deliver their full capacity if the power is used slowly. Electronic devices such as digital cameras place a high power drain on batteries, so it is much better to use rechargeable NiMH or NiCd batteries for these type of devices. Lithium batteries also work well in high drain applications but they are expensive and are not designed to be recharged. Duracell Ultra and Energizer Advanced Formula batteries do last longer than standard alkalines.