E.Echo 50mm f/3.5 Anastigmat Lens – M39 Mount – Vintage Enlarger – Clean Optics

Description
The E.Echo 50mm f/3.5 Anastigmat is a vintage enlarger lens in M39 screw mount, likely produced in Japan during the mid-20th century. Designed for darkroom use, it offers a sharp, flat-field rendering ideal for enlarging 35mm negatives. With its compact build and classic styling, it’s also popular among DIY lens adapters and collectors seeking obscure optical designs. While not rangefinder-coupled, it can be adapted for macro or digital mirrorless experimentation.

Condition

• Optics: Clean - possible minor dust.
• Body: Light cosmetic wear consistent with age
• Aperture blades: Snappy and oil-free
• Mount: M39 screw thread – clean and secure
• Focus: Fixed or limited (typical of enlarger lenses)
• Overall condition: Good

Included

• E.Echo 50mm f/3.5 Anastigmat lens (M39 mount)

Collector’s Notes
E.Echo lenses are relatively obscure, likely distributed under house-brand names for enlarger systems. The Anastigmat designation suggests a corrected optical formula for distortion and spherical aberration. While not designed for general photography, these lenses are valued by tinkerers and collectors for their build quality and unique rendering. Can be adapted for mirrorless macro use with helicoid adapters.

Key Features

• Focal length: 50mm
• Aperture: f/3.5 to f/16 (approx.)
• Mount: M39 screw thread (enlarger type)
• Focus: Fixed or limited (non-rangefinder coupled)
• Filter thread: Uncommon or non-standard
• Made in Japan

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