I tried looking for the information I need, but being new to photography, most of the information made no sense to me. My father recently gave me a Nikkor 50mm 1.4 lens that he used on a Nikon EM90. The lens is in great shape and I would like to be able to use it with my GX1, but I'm not sure which adapter I will need. I'll be in Syracuse a week from today and my father-in-law will be giving me a bunch of old lenses and gear that he has boxed up. They are from a Pentax 35mm SLR that he bought in 1984. The biggest lens he said he has is 800mm. He's pretty busy so I was not able to get much information as to what brand of lenses, or what other gear he has. I'm hoping that the information he gave me will give someone enough info to narrow down what type of mount is on the lenses. Also, feel free to post any websites that may help me figure this out on my own or help me in the future.