A--the outside of the barrel has a slanted shoulder that acts as a safety stop. B--fully Extinction thread inside (M48*0.75) C--material:aluminum,anodized black D--M42*0.75 (male T-thread) which can connect with T-ring adapter to photograph astronmomy. E--shorten length:94mm F--stretch length:128mm G--the max bearing: 8kg detail data information net weight=0.227kg packing=white box packing(6x6x10cm) shipping packing=carton pape |