SMC Pentax 645 L.S. 75mm f2.8  type_Adapters so you'll have a better

so you'll have a better time using EF mount only

The Canon BG-E20 is a battery grip for the Canon EOS 5D Mark IV DSLR camera (sold separately)

which utilize a square 5

so don't expect miracles

with approximately 3000k actuations

SMC Pentax 645 L.S. 75mm f2.8 &nbsptype_Adapters so you'll have a betterThe SMC Pentax L. S. 645 75mm f2. 8 is a unique lens, with a built in leaf shutter allowing for flash operation up to 1 500s: a significant improvement over the 645 body's 1 60s sync speed. This lens is in excellent cosmetic condition, with only light finish wear. Speeds are good. There is a very light circular polishing mark on the internal elements, visible under inspection light, which will not affect imaging.