Nikon's budget enlarging lens — the EL-Nikkor 50mm f/4 for 35mm darkroom printing.
The Nikon Nikkor EL 50mm f/4 is an enlarging lens from Nikon's EL series for darkroom use, slightly slower than the f/2.8 version at f/4 maximum aperture. The f/4 variant was produced as a more compact and affordable alternative within Nikon's enlarging lens range.
The lens provides 50mm at f/4 maximum aperture with Nikon's multi-coating and flat-field optical formula for 35mm negative projection. The f/4 maximum aperture is one stop slower than the f/2.8 version, which slightly reduces the brightness of the projected image during composition.
The Nikkor EL 50mm f/4 offers Nikon's enlarging lens optical quality at a slightly more accessible price than the f/2.8 variant. For darkroom photographers who do not require maximum aperture brightness during composition, it provides the same print quality in practical use since printing exposures are typically made at f/5.6 to f/8 regardless of maximum aperture.
Check element condition and Nikon NIC coating integrity. Test aperture blade operation. Verify mounting thread compatibility with the intended enlarger head. For comparative evaluation with the f/2.8 version, note that print quality at typical working apertures is identical.