Indeed.
When enlarging T-Max 100 4x5 negatives to 16x20 and 20x24, I have a hard time focusing the grain because it's almost invisible at 4-5x.
IMO, anything past 4x5 gives NO real benefit for enlargements - while also vastly increasing cost and complexity when it comes to the enlarger needs. The trade-offs between size of film and resolution loss due to further stopping down needed to get the same DOF makes it all come out mostly equal. Larger formats are best for contact printing.
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