I have aquired an old horseman 6X9 fieldcamera( model name is ER-1) with three l enses.(75mm, 105mm, 180mm). The problem is even though I focus correctly on the groundglass using 6X loupe, result are always not sharp. It seems that critical focus is always a bit further from the plane of focus where I thought IS the pla ne of focus in groundglass. Are there any economical way to fix this problem? Is this the lens alignment problem? thanks in advance. Taewon from Chicago.
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