Horseman ER-1

Jump to: navigation, search

The Horseman ER-1 is a 6x9 format technical/field/press camera which takes roll film in interchangeable backs, introduced at the 1984 Photokina[1], and released 21 April 1986 in Japan[2]. It was sold by Komamura and manufactured by Tokyo Kogaku,


The Horseman ER-1 allows movements/adjustments to correct for various distortions and to control the plane of sharp focus. Being a field camera, it is similar to a view camera but more compact and with fewer adjustments. In common with many press cameras it has a viewfinder and rangefinder to allow handheld use.

Notable changes from the Horseman VH-R include a removable zoom viewfinder (65-300mm) and the ER (Electro-Remote) monitoring system. The monitoring system is located in the ER-grip and requires an ER roll film holder and ER lens to work. The system will indicate if the film needs winding and if the dark slide has been removed. The battery holder for the ER-grip is the same as for the Topcon Super DM winder. If users really demanded such a system, is unclear, however it seems the intention of the ER-system was to lower the threshold for purchasing a technical camera, often thought to be difficult to handle and easy to fail at operating[3]. Some sources state that the camera ceased production due to the supply of the electronic components being discontinued[4].


Rangefinder Rangefinder coupling range Camera bed drop Lens standard movements Camera back movements Revolving back system Track extension Bellows extension Dimensions Weight
Cam coupling double image coincidence type (Base = 70mm, Ratio = 1:1).
  • 65, 75, 90, 105mm = 1m-inf.
  • 120, 150, 180mm = 2m-inf.
15 degrees
  • Rise = 28mm (15mm with wide angle lens)
  • Swing = 15 degrees l/r
  • Tilt = 10 degrees forward or 15 degrees backwards
  • Lateral shift 30mm left or right (15mm with wide angle lens).
  • Swing 10 degrees left or right
  • tilt 11 degrees forward or backward.
  • Horseman mini-graflok
  • Due to changes in the back interface, certain third party backs which work on the VH/VH-R do not fit on the ER-1, including the Mamiya RB 6x8 back.
  • 90 degrees rotation
  • Front = 249mm
  • rear = 23mm
145 x 152 x 96 mm when folded.
  • 2.0kg with focusing screen and foldable hood

ER lenses

A new seven-lens lineup was introduced with the ER-1 camera. All ER lenses feature "Hard Multi Coating", and are rangefinder coupled with the correct rangefinder cam. The ER lenses are mounted on special 80mm Horseman lensboards with built in micro-solenoids and contacts for interfacing with the ER-monitoring system.

Lens Lens construction Image circle Filter diameter Front diameter Rear diameter Flange focal distance Overall length Weight
ER 65mm f7 6 elements in 4 groups, Biogon type 152mm (f22), 120mm (f7) 40.5mm 42mm 39.5mm 70.6mm 55.8mm 300g
ER 75mm f5.6 6 elements in 4 groups, Orthometar type 120mm (f22), 100mm (f5.6) 40.5mm 42mm 31mm 73.7mm 37.9mm 230g
ER 90mm f5.6 6 elements in 4 groups 150mm (f22), 130mm (f5.6) 40.5mm 42mm 39.5mm 88.6mm 39.5mm 230g
ER 105mm f5.6 6 elements in 4 groups 160mm (f22), 140mm (f5.6) 43mm 45mm 48mm 104.2mm 47.5mm 260g
ER 120mm f5.6 6 elements in 4 groups, Orthometar type 160mm (f22), 160mm (f5.6) 40.5mm 42mm 51mm 121.3mm 49.8mm 290g
ER 150mm f5.6 4 elements in 3 groups, Tessar type 160mm (f22), 140mm (f5.6) 40.5mm 42mm 31mm 144.4mm 41.5mm 250g
ER 180mm f5.6 4 elements in 4 groups 140mm (f22), 100mm (f5.6) 52mm 54mm 39.5mm 124.9mm 74.5mm 330g

ER accessories

  • ER grip, 280g
  • ER Roll Film Holder 6x7 and 6x9, 450g
  • Universal Zoom Finder, 280g