Some photographers call a picture tak sharp if it works as an reference for sharpness. They say that the artifical word tak comes from the Asahi Pentax Super Takumar 1.4/50mm. I've used that approximately 50 years old prime lens together with intermediate rings on a Canon EOS 30D camera to take some pictures of cherry blossom in Upper Bavaria. No tripod was used. I hope you like the photos.