With its unique designing, suitable for any occasion, wedding banquets, birthday party, or professional fashion show Comes with shoulder strap and 2pcs metal buckles for easy carrying and securing, avoiding accidental loss Quick lens replacement equipment, lens holder, lens switcher, it can help you carry the lens more conveniently Specially designing for professional photographers or those who need to in different ways It allows you to switching the lens from short to long within 10s, which is and fast