Sigma APO Teleconverter 1.4X EX DG for Nikon F brand_Hasselblad meant to hold a flash

meant to hold a flash or similar small accessory with compatible mount

4 scrims (single & double for each fresnel)

so that's a plus

Well corrected for distortion and aberration

6L IS II lens

Sigma APO Teleconverter 1.4X EX DG for Nikon F brand_Hasselblad meant to hold a flashThe Sigma APO Teleconverter 1. 4X EX DG for Nikon F mount is a good quality, compact teleconverter for use with many (but not all!) Sigma F mount zoom lenses. It may also work with other brands, but we can't guarantee it. Please check your lens instruction manual for compatibility: this is not a universal teleconverter and it won't work with everything. In excellent condition, with clean glass and good function. Includes softcase.