Good point...tacks are sharp, but pins and needles are a lot sharper. We need poke-your-eyes-out pin sharp lenses, not those dull ol' "tack" sharp ones.
Actually. Are pins and tacks sharp? A knife's edge is said to be sharp. You can cut yourself with a sharp object. Can you cut yourself with a pin? We prick ourselves with pins and tacks.
Not trying to be prick, or prod at the point, but perhaps we're not all as sharp as we thought to first even question a photo's tack sharpness. LOL.



