The new contender features a longer travel by 25 mm, totaling now a 50 mm drive from end to end.
The incorporation of a Micrometer Head with an extra-fine graduation of 0.01 mm !!! puts MS4-2 now at the top of the Hejnar line of macro / micro rails.
The Rail structure
| Manufacturer Specification: | |
|---|---|
| Model: | MS4-2 |
| Length: | 205 mm (8.125") |
| Total length set at 50 mm: | 355 mm (14") |
| Width: | 55 mm (2.18") |
| Heigth (Thickness): | 63.5mm (2.5") w/ F72b QR clamp |
| Weight: | 963 gr ( 2 lbs 3 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) |
| Hardware: | Stainless Steel |
| Made in: | U.S.A. |
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The rail, structure and clamp are made from Black hard coat anodized Aluminium, but moving parts of the slider are made from Stainless Steel and Wear & Water-Resistant Delrin® Acetal Resin ( see Polyoxymethylene ).
The focusing rail itself has a length of 8.125" (206 mm) while its total length with Micrometer Head set at 50 mm will reach 14" (355 mm).
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| The Mitutoyo Micrometer Head has a 0-50mm range of movement and a fine graduation of 0.01mm. The Micrometer head can be oriented in any direction (default orientation is with scale facing up). |
The Quick Release Clamp
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The slider is equipped with an Updated Hejnar Photo F72b 2.375" (6 cm) long Arca Swiss® compatible Quick Release clamp, with embedded bubble spirit level. (b at the end stands for long black knob).
The clamp is retained on the slider by a 1/4"-20 flat head screw, which can be easily removed in order to reveal the relevant threaded hole and the alignment dowel pins.
As all Hejnar PHOTO clamps, F72b has corresponding 5mm holes at its bottom for the proper alignment with other Hejnar rails or clamps.
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| Just by changing the dowel pins position, the quick release clamp screw-knob can be reoriented by 90 degrees, at any four positions suitable to the users needs. Then it may be securely fixed with the 1/4"-20 screw. |
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| The bottom rail is equipped with an Arca Swiss® compatible dovetail , so it can be used with any Ball or Pan head equipped with an Arca compatible clamp. |
When the MS4-2 Linear Motion Micrometer adjusting micro rail is mounted on a Head equipped with an Arca-Swiss® compatible clamp. A rough camera to subject distance can be performed moving the LMM rail within the clamp and then perform any extra-fine adjustments using the Micrometer.
The Rail will 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).
Conclusion
The longer travel, the choice of materials, manufacturing quality, extra fine micrometric adjustment and last but not least Arca Swiss® compatibility, make this Linear Focusing even more outstanding than its predecessor, which of course remains as a shorter travel choice.
I hope you found the article useful, thank you for viewing.
All Photos used by permission: © 2013 Chris Hejnar / Hejnar PHOTO
Price and Availability:
Current price for the MS4-2 Micrometer Micro rail is US$ 550.00 (+ Shipping where applicable) and is available from Hejnar Photo online store.
If you are interested in the product, do check the Recommended Sellers page for the current valid Hejnar Photo discount coupon before placing your order.
Referenced Articles:
Updated Hejnar PHOTO Quick Release Clamps Preview
Relevant Articles:
New Hejnar PHOTO Linear Motion Micrometer Macro / Micro Rail
Hejnar PHOTO MS-3_8 Linear Motion Macro Focusing Stage Review
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