CONTROLLING THE EXPOSURE
Since the Reflex-Nikkor is fitted with a fixed f/11 aperture, exposure adjustments are possible only via the use of neutral density filters (or by adjusting the camera's shutter speed). Nikon offers three different ND filters (the ND4X is provided with the lens) having exposure factors of 2X, 4X and 8X, respectively, to enable effective aperture settings of f/16, f/22 and f/32 with the Reflex-Nikkor 1000mm f/11. The table below shows the various effective apertures and factors available with each filter; note that since the ND filter only cuts down the light striking the film without reducing the lens aperture, depth of field remains the same.
| Exposure factor | Effective aperture |
Type of filter | with the Reflex- |
| | Nikkor 1000mm f/11 |
ND2X | 2 | 16 |
ND4X | 4 | 22 |
ND8X | 8 | 32 |
FEATURES/SPECIFICATIONS
Focal length: 1000mm
Maximum aperture: f/11
Lens construction: 5 elements in 5 groups
Picture angle: 2°30'
Distance scale: Graduated in meters and feet from 8m (25 ft) to infinity (»)
Exposure measurement: Via stop-down measurement; meter coupling shoe not provided
Lens hood: Slip-out type built into front of lens
Tripod mounting: Via socket in tripod mounting collar; collar rotatable on lens to permit vertical and horizontal format picture-taking; click-stops provided at each 90° of rotation; collar locking screw provided
Attachment size: 108mm (P = 0.75mm)
Filters: 39mm screw-in type via rear threaded mount; provided with set of five filters, including L37C, A2, B2, 056 and ND4X; one filter must be in place at all times
Mount: Nikon bayonet mount
Dimensiosn: Approx. 119mm dia. x 233.5mm extension from camera's lens mounting flange; approx. 241mm long (overall)
Weight: Approx. 1900g
ACCESSORIES
