Puzled over Filed of View on Nikon Eypieces
I have a 25-75 zoom eyepiece for my ED 78 and reading many of the messages there seems to be a lot in favour of the 30w eyepiece, the reason being given is the wide Fov. Now having been out to Southport birding yesterday I can understand that a wider field of view would be preferable in some instances, but I'm puzzled as to just how much difference the fixed eyepiece would make. Nikon say that my eyepiece has a Fov of 28m at 1000m, and the 30x eyepiece has a fov of 42m at 1000m. Does this 14m increase at this distance make a lot of difference. My inference would be that at 100m I would be looking at something which is just over a metre more than I can see at the moment. Have I got something wrong?
I have a 25-75 zoom eyepiece for my ED 78 and reading many of the messages there seems to be a lot in favour of the 30w eyepiece, the reason being given is the wide Fov. Now having been out to Southport birding yesterday I can understand that a wider field of view would be preferable in some instances, but I'm puzzled as to just how much difference the fixed eyepiece would make. Nikon say that my eyepiece has a Fov of 28m at 1000m, and the 30x eyepiece has a fov of 42m at 1000m. Does this 14m increase at this distance make a lot of difference. My inference would be that at 100m I would be looking at something which is just over a metre more than I can see at the moment. Have I got something wrong?