37mm ND2-ND32 (1-5 Stop) Variable ND Filter and CPL Circular Polarizing Filter 2 in 1 for Camera Lens Nano-Xcel Series

SKU: KF01.2047

A
Hi, if you want screw other filter or lens cap on this filter , need larger size than multifuctional filter , if you order 77mm ND2-ND32&CPL filter , the front of lens cap or filter need 86mm, of course you can use filter adapter rings , but too much filter added , it might be caused dark corner. 
A
Yes, and another filter can be screwed on to it. 
A
No. You need the 77mm size to fit that lens.