Thank everyone for all your helpful information, comments. I passed it along and learned a lot as well. I appreciate all the response. I knew I loved this site. Thanks again, Pam S.
Can anyone advise me (for a friend) on how to synchronize a Lightdow 420-800mm f/8.3 manual zoom telephoto lens + T-mount with a Nikon D3500? This is for a birding friend. I appreciate any info. I can get. Thanks so much. Pam (this is my 1st time on this forum)