I am currently usin g a 10x loup. Is this too much to use as a focusing aid on the 4x5 GG? I use a fresnel lens and the concentric circles are apparent when v iewing a composition using this loup, but besides the annoying lines are there a ny other reasons that I should be using a lower power loupe. It seems to me tha t the higher the power the more critical the focus/sharpness. Any opinions?
Thank you
Clark
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