thanx ppl
shopnobaj bhai...thnx for the advise and the links...I will work on it
achha shopnobaj bhai...amar concert photography gulao ki arekta thread pen korey post korbo ? ki bolen...janina apnader kemon lagbe, onekey boley : 'concert photos, eita kono subject hoilo?', but amar ogulai beshi bhalo lagey