I tried to reach the company re this question but they are not particularly accessible. That tells me something in its own right. Anyway, looking at their site, I can’t determine whether there attachment will fit my field scope eyepiece or not. I measured both eyepieces and one is 1.36 inches in the other is about 1.65. Does anyone know whether their phone scope attachments will fit Nikon? Many scopes have much larger eyepieces and are probably more suitable but given the popularity of Nikon would like to think they have something that works.