Quote Originally Posted by ruilourosa View Post
Would one of these loupes designed for making videos in dslrs make a good loupe for large format? some are terribly expensive but there are some really cheap, they are around 3x... what do you say?
That DSLR loupe is a widget which goes on the eyepiece? If so, no, it almost certainly will not focus on the groundglass of a largeformat camera.