Old Delft FOTOTEL 400mm F/5 Mirror

Specifications01

MountINTERCHANGEABLE MOUNT

Focal length400mm

Max aperturef/5

TypeMirror · Telephoto · Prime

Weight1000 g

AutofocusNo

StabilizationNo

Aperture controlNone

Lens hoodBuilt-in telescopic round

Additional Info02

Lens TypePrime lens

Field Notes02

Old Delft Fototel is a 400mm f/5 mirror (catadioptric) telephoto lens with an interchangeable mount. It’s intended for distant subjects where long reach is needed.

AI-assisted summary — verify against linked sources

Catalog note · source: thelensdb

Sources03

thelensdb.comVisit ↗

Other Mounts03

No alternate mounts are indexed for this family yet.