Mamiya 645 Bellows Lens Hood User manual

Bellows Lens Hood
English Instructions

Names of Parts
Introduction
The Mamiya 645 Bellows Lens Hood is a versatile, compendium hood with an integrated rack-and-
pinion mechanism, a freely extendable bellows and a 3x3” (7.6cm) gelatin filter slot.
It is applicable to the Mamiya 645’s 55mm to 300mm f/5.6 interchangeable lenses.
The Mamiya 645 Bellows Lens Hood incorporates a 67mm Retaining Ring, a 58mm Retaining
Ring and a Telephoto Mask for the 150mm, 210mm and 300mm f/5.6 lenses.
Extension Scale Settings for the Mamiya 645 Leaf-shutter Lenses
Lens Extension Scale Index Mark to Use
80mm f/2.8 NL 80mm f/1.9
55mm f/2.8 NL 55mm f/2.8
150mm f/3.8 NL 150mm f/3.5
Do not use the Telephoto Mask

Installing the 645 Bellows Lens Hood
1. Select a lens compatible with the Bellows Lens Hood, and then install it on your camera.
2. Loosen the Bellows Lens Hood’s Retaining Ring Locking Screw, Fig. 2 (1), and remove
the Retaining Ring from the Bellows’ Lens Port, Fig. 2 (2).
3. Use either the 58mm or the 67mm Retaining Ring, depending on the filter size of the
lens, and then screw the Retaining Ring into the lens’ filter threads.
4. Insert the Bellows Lens Hood’s Lens Port, Fig. 2 (2), over the Retaining Ring installed
on the lens.
5. Rotate the Bellows Lens Hood so that its edges are aligned with the front lines of the
camera, Fig. 3, and then tighten the Retaining Ring Locking Screw, Fig. 2 (1).
Misalignment of the Bellows Lens Hood may result in vignetting of your images.
Using the 645 Bellows Lens Hood
1. Loosen the Bellows Lens Hood’s Extension Locking Screw, Fig. 2 (3).
2. Turn the Extension Knob, Fig. 2 (4), and align the red Index Mark, Fig. 3 (5), with the
number inscribed on the Extension Scale, Fig. 3 (6) for the focal length of your lens,
Fig. 3 (7).
3. Tighten the Extension Locking Screw, Fig. 2 (1).
 When using the 15Omm, 21Omm or 300mm f/5.6 lenses, insert the Telephoto
Lens Mask into the Bellows’ Telephoto Mask Slot. Push the mask into the slot
until the top of the Mask is flush with the top of the Bellows’ frame, Fig. 1.
 To use a gelatin filter, insert the filter into the Bellows’ Filter Slot, and then
close the Filter Safety Pin to prevent it from falling out, Fig. 1.
 The index marks inscribed on the Extension Scale include safety margins to
prevent vignetting at the edges of the frame.
 If you extend the Bellows Lens Hood further than the index mark for a lens,
vignetting may occur, especially when the lens is set to its largest aperture.
This may occur even if you do not see any image cutoff in the viewfinder.
 Due to the large aperture of the 210mm lens, the Extension Scale index
mark for this lens is shorter than the index mark for the 150mm lens. This
offset eliminates vignetting when the 210mm lens is set to its largest
aperture.

 With some tripods and lenses, the Extension Scales Knobs, frame or the
Extension Scale may hit the tripod mount. If you encounter this situation,
turn the Bellows Lens Hood upside down, but be sure that it is correctly
aligned with the camera, Fig. 4.
 If you use the Bellows Lens Hood in an upside down position, and you are
using the 150mm, 210mm or 300mm f/5.6 lens, insert the Telephoto
Lens Mask from the reverse side of the Bellows to prevent it from
dropping out of the frame.