M42 Adapter for Nikon camera's

Hi, I just purchased an adapter from amazon. It's an adapter for m42 screw on lens. I don't want to risk opening it. Because to me it says m42 to Nikon v1 mirror less? I did the homework before ordering it. But things happen. Does anyone have experience with one of these adapters? Yes I know everything will be all manual, but seems that's the "in" thing now lolz

I have included some pics to help out. I'm going to call them on Monday to make sure. If not, I'll return it. I know they work on Pentax camera's because I have one. But it's cheaper to buy the adapter than a pentax body in order to use the old glass. Lens = ASAHI PENTAX Super tak 55mm 1.8, auto revuenon 50mm 1.8 vivitar 28mm 2.8 and a 200mm put away somewhere.

thanks in advance,

I got it on and took a pic of it. It's really hard to get if off. Maybe I'm doing something wrong.

My answer is way past the time when it was needed. The key words you needed to search are M42 to Nikon F-mount adapter. F mount is the DSLR mount that has been in existence in 1 form or another since 1959.

Besides F, there was the Nikon-1 system that was mirrorless and intended to compete with Micro-Four-Thirds, and failed. Currently Z-mount is the Nikon mirrorless mount system. I would be impressed if you ever managed to screw a Z-mount adapter into an F-mount body. The Z-mount opening is significantly larger than F.

I've gotten as far as attaching the lens and removing. I'm waiting on the focus screen and maybe a magnifier