Photoseiki Macro Focusing Rail

Photoseiki Macro Focusing Rail

Photoseiki Macro Focusing Rail

B&H # PHMR101 MFR # MR-101
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Product Highlights

  • Allows Precise Movement Along Lens' Axis
  • Fits Arca-Type QR Camera Plates
  • Adjustment Range of 4.1"
  • Load Capacity of 77 lb
  • Arca-Type Base for Mounting to Tripods
  • 3/8"-16 & 1/4"-20 Mounts Also Supported
  • Rotating Knob for Fine-Tuned Adjustments
  • Camera Mount Rotates 90°
  • Scaled Base for Precise Measurements
  • Aluminum Construction
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You Pay: $279.00

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  • 1Description

The Macro Focusing Rail from Photoseiki is a precise focusing rail designed for fine adjustments of camera-to-subject position as small as 0.02mm along an axis. It is well-suited for focus stacking and can be used for critical applications such as architecture photography. The clamp mount fits Arca-type quick release plates and can support gear as heavy as 77 lb when used with other Photoseiki equipment.

Moving the gear along the 4.1" adjustment range is simple with the use of a rotating knob. Adjustments can be made precisely with the use of the scaled base, which features marked intervals at tenths of a centimeter. The mounting plate can be rotated 90° to allow movement control on a second axis, widening the range of possible shots.

The rail has an Arca-type base that allows you to mount it to any compatible tripod or stand, and also fits standard equipment via a 3/8"-16 threaded screw mount at the bottom. An adapter for 1/4"-20 screws is included for additional compatibility. The product is made out of machined aluminum and comes with a limited lifetime warranty.

Note: the rail does not come with the quick release plate for the bottom of your lens, which needs to be purchased separately for use.

In the Box
Photoseiki Macro Focusing Rail
  • 3/8"-16 to 1/4"-20 Screw Mount Adapter
  • Limited Lifetime Warranty
  • Table of Contents
    • 1Description
    Adjustment Range 4.1" (10.5 cm)
    Load Capacity 77 lb (35 kg)
    Quick Release Yes, Arca-type
    Attachment Options Arca-type base
    3/8"-16 threaded screw mount
    1/4"-20 threaded screw adapter
    Material of Construction 7075 aluminum alloy
    Dimensions (H x W x D) 2.3 x 3.9 x 8.6" (5.8 x 10.0 x 22.0 cm)
    Weight 1.68 lb (0.76 kg)
    Packaging Info
    Package Weight 2.6 lb
    Box Dimensions (LxWxH) 12.2 x 10.7 x 2.6"
    Macro Focusing Rail is rated 4.5 out of 5 by 2.
    Rated 5 out of 5 by from Excellent piece of equipment! It's a beautifully designed and machined focus rail, with one really nice feature that sets it apart from other focus rails: the focus knob is oversized, and is marked with major divisions at 0.1 mm intervals and minor divisions at 0.02 mm. This means you can easily do focus stacks with precise uniform spacing at high magnification and shallow depth of field. For example, with a 20mm macro lens at 4x magnification and f/8, I found that a spacing of 0.1 mm is needed. Other focus rails will have 1 or 2 mm per revolution of the knob, but without the markings that this rail has it will be hard to get a uniform 0.1 mm spacing. One caveat however: when I first received the unit the the action was very stiff. To investigate I removed the two screws that hold the carriage to the nylon follower nut (see attached photo; a metric hex wrench was needed). When I reassembled it the action was much smoother, pretty much perfect. I suspect the screws may have been overtightened, squeezing the nylon follower into the lead screw threads. In spite of this I'm still giving it 5 stars because it was an easy adjustment to make.
    Date published: 2017-10-29
    Rated 4 out of 5 by from Very Nice Macro Focusing Rail but with a Notable Design Flaw This is an excellent piece of equipment that I’m using with a Sony A7rii with either a 90mm Sony FE Macro, or a Sigma MC-11 adapted Canon MP-E 65mm 1x-5x Macro lens. It’s very well made and as far as I know, it’s the only manual, micrometer adjusting, screw advancing macro rail available. I use it clamped at right angles to a Hejnar 8 inch macro rail, which serves for lateral adjustment. Such a device is essential for precise focusing increments (as fine as 0.02mm) which deliver acceptably overlapping (20%) DOF between successive images at high magnifications. I won’t go into all the specs, you can read them for yourself. Another reviewer proved correct when he mentioned that the advance and recession is fairly stiff and the large micrometer knob has not a little resistance to turning. That’s ok, and I assume that it will loosen up as the unit breaks in. If not, I can live with it. I’m subtracting one star for a design flaw. The unit comes with its arca-swiss compatible clamp oriented parallel to the long axis of the rail so that the knob sticks out to the side. This is fine if you’re using a macro lens with a lens collar and foot. The clamp can be rotated in increments of 90 degrees. If you are mounting a camera with a camera plate or L-plate with a smaller macro, you will have to remove and reattach the rail’s clamp so that it’s oriented perpendicular to the long axis of the rail. Thus reattached, the large knob that tightens the clamp will protrude toward one end of the rail’s frame or the other and will bump into the end of the rail’s frame, so you will lose 4-5cm of travel in whichever direction that the knob is pointing (picture attached; sorry for the IQ, lowlight, hand held, no IS). The manufacturer should use a lever clamp (preferably) or a smaller diameter knob. Nevertheless, I am enjoying using this very helpful device and am also including a photo of one of my first attempts at image stacking with my recently purchased Canon MP-E 65mm macro. I’m still learning so bear with me.
    Date published: 2017-12-17
    • y_2018, m_7, d_16, h_18
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