The design concept of the brand new MS4-100-1 fits between the original MS-3_8 Linear Motion Macro Focusing Stage and the high precision MS4 with Micrometric Head, but with a more affordable price tag than both.
It is based on the smaller 25 mm MS4 Macro Rail but instead of a Micrometer Head it uses a Precision Lead Screw with a 100 TPI extra fine movement which requires a 100 rotations of the screw in order to move 1".
This in turn translates into 0.0254 mm movement per rotation of the knob.
The Rail structure
|Length:||160 mm (6.3")|
|Total length set at 25 mm:||254 mm (10")|
|Width:||55 mm (2.18")|
|Heigth (Thickness):||63.5mm (2.5") with F72b QR clamp|
|Weight:||760 gr ( 1 lbs 11 oz)|
|Materials:||Precision C.N.C. machined 6061-T6 Aluminium,|
Black hard coat anodized,
Stainless Steel and
Wear- and Water-Resistant Delrin® Acetal Resin (slider)
|The MS4-100-1 shares exactly the same parts with its siblings. The rail, the base and moving structure and the clamp are made from Black hard coat anodized Aluminium. While the slider bars and the lead screw adjustment mechanism are made from Stainless Steel and Wear & Water-Resistant Delrin® Acetal Resin ( see Polyoxymethylene ).|
The focusing rail has a length of 6.3" (16 cm) while its total length with lead screw knob is 10" (25,4 cm). It is 2.18" (5,54 cm) wide by 2.5" (6,35 cm) thick including the quick release clamp. Total Weight 1lb 11oz (760g).
|The Mitutoyo Micrometer Head of the MS4 has been replaced by a lead adjusting screw with equal 0-25mm range of movement. Unfortunately the micrometric scale is also lost in the name of simplicity and cost reduction.|
The Quick Release Clamp
|Just by relocating the dowel pins, the screw knob of the quick release clamp can be reoriented by 90 degrees, at any four positions suitable to the users needs. Then the center 1/4"-20 mounting screw needs to be tightened again securing it in place.|
The lead screw fine adjustment is a cost effective alternative to micrometers when position readout is not a requirement.
According to the manufacturer, the MS4 family rails work in vertical orientation (perpendicular to the ground) with a load up to 10 lb (4,53 kg), while in horizontal orientation (parallel to the ground) the load can be increased up to 15 lb (6,80 kg).
The choice of materials, manufacturing quality, extra fine adjustment and last but not least, Arca Swiss® compatibility make this Linear Focusing rail really outstanding.
Both the base rail dovetail and the QR Clamp are compatible with Kirk®, R.R.S.®, Arca-Swiss®, and almost all other Arca-Swiss style Quick release clamps and plates respectfully.
I hope you found the article useful, thank you for viewing.
All Photos used by permission: © 2015 Chris Hejnar / Hejnar PHOTO
Price & Availability:
Current price for the MS4-100-1 Lead Screw Macro rail is US$ 310.00 (+Shipping where applicable) and is available from the Hejnar Photo online Store.
If you are interested in the product, do check the Recommended Sellers page for a valid Hejnar Photo discount coupon before ordering.
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