Originally Posted by
Doremus Scudder
Just to clarify: If you are using the condenser light source, you need to adjust the upper bellows to the right height for the size of negative you are enlarging. Originally, the enlargers equipped with condenser heads had a scale marked by negative format as a guide (35mm, 6x6, 6x9, etc.). You'd set the bellows using that.
If you are using a color head or a cold-light head, the upper bellows need to be completely collapsed to get the diffusing screen as close to the negative as possible. That goes for all Beseler color heads and after-market diffusion/cold-light heads of any brand.
Best,
Doremus
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