>>4365862>>4365863Blurriness may be also because you're using a non-macro lens which are not designed for such high magnification ratios. When you get to around 1:1 the difference between a dedicated macro lens and an adapted regular 50mm is noticeable. Also use a flash man, at high magnification you'll need it even with fast film, you'll want to be able to stop down as much as possible and even with fast film it isn't doable without a flash.
