RWR wrote:
I wouldn’t think you’d need more than 10X. I have a 6X Rodenstock loupe that covers an entire 24 x 36mm negative, which I use for ground-glass focusing and examining finished prints. I use a 15X Peak #2016 loupe for evaluating transparencies. I don’t know about the cheap knock-offs, but I also have an original Agfa 8X loupe that is quite sharp except for the very edges.
Thanks for this information RWR. Along with other suggestions loupe wise, it puts me in the ball park and will help me make a more informed selection. Much appreciated.