June 6, 2016

Updated Linear Motion MS5 DSP Macro Rail with Digital Scale from Hejnar PHOTO

Hejnar Photo MS5_DSP Linear Motion Macro Rail w/ Digital Scale
Hejnar Photo has just announced an Updated version of their Innovative Linear Motion MS5 DS4 Macro Rail with Digital Scale (preview) released in Sep 2015, the MS5 DSP. The update and improvement is directly related to the implementation of the carriage break and its mechanism.

It still remains the first in the world Linear Motion - Lead Screw focusing macro rail with a Digital Scale attached on its side, and with an Arca-Swiss® compatible dovetail as expected.

The modifications applied to the MS5 DSP had been already implemented on the Hejnar PHOTO MS5P 8" Linear Motion Lead Screw Macro Rail (preview) released last March.
In a few words the old Push Button mechanism present in the Hejnar PHOTO MS-3_8 Linear Motion Macro Focusing Stage (review) has been applied on the newer MS5 series macro rails, reducing production cost with fewer parts and machining time. Therefore, Hejnar may now offer the MS5 series at a lower price.

The Rail structure

Manufacturer Specification:
Model:MS5 DSP
Rail Length:225 mm (8.895 ")
Overall Length:297 mm (11.70")
Overall Width:149 mm (5.90")
Height (Thickness):57.6 mm (2.27") w/o QR clamp
73.7 mm (2.90") with F63b QR clamp
Weight:1400 gr (3.1 lbs)
Materials:Precision C.N.C. machined 6061-T6 Aluminium,
Black hard coat anodized, Stainless Steel and
Self Aligning Linear Sleeve Bearings (slider).
Hardware:Stainless Steel
Made in:U.S.A.

As obvious from the table above, the MS5_DS4 and the MS5 DSP have exactly the same characteristics. While all other high end specs remain; with an outer shell made of aluminum with a 0.002" thick ceramic coating. This offers added corrosion resistance and endurance at a temperature range of –400° F to +375° F (-240° C to +190° C ).
Further to that, the Self Aligning Linear Sleeve Bearings featured by the MS5 series rails, have a nonabrasive, chemical-resistant PTFE liner which doesn't require any additional lubrication, consisting them virtually maintenance free.

Hejnar Photo MS5_DSP top view
The updated MS5 DSP is exactly the same with the MS5 DS4 Linear Motion Macro Rail with Digital Scale except for the carriage break mechanism.
Hejnar Photo MS5_DS4 slider brass release lever detail
As a reminder on the MS-5_DS4 and MS5_8, fast positioning of the slider is provided by just pressing the brass slider release lever shown protruding below the carriage.
Hejnar Photo MS5 DSP slider release chrome push button detail
Same as with the MS5P_8 the release lever has been replaced by a release Push Button, thus the P at the end of both the latest models.

The Digital Scale
As with its predecessor the innovation and most important attribute of this MS5 DSP macro stage is the Digital Scale which offers a quite useful number of functions.

Further down the orange and blue buttons are responsible for changing the reading in increasing or decreasing order.
The Digital Scale Reading / Control Head is driven by an extension protruding from below the carriage. It features several buttons which control the functions. A red [OFF] button, a green [ON] button with [0] (zero) function when pressed twice, (meaning it can zero the reading at any point of the scale so a + or - reading can start from there).

Hejnar Photo MS5_DSP Digital Scale reading head detail
The Digital Reading is easy to convert between Inches (imperial system) and Millimeters (metric system) with the press of the white [mm/in] button.

The Digital Head features a hardened SS slide beam which remains intact under temperature changes and has a printed scale on its surface both in metric and imperial degradation.

The MS5_DSP side extension that holds the digital scale slide beam features small feet on both sides, maintaining its balance when placed flat on a table instead of being clamped.

The F63b Quick Release Clamp

Manufacturer Specification:
Jaw Length:3.25" (82 mm)
Weight:135 gr (4.7 oz)
Countersunk/threaded holes:Three (1 x 3/8"-16 center hole and
2 x 1/4"-20 outside 45 mm apart)
Safety Stop Relief Grooves:Two
Long Captive Screw Knob:Stops at maximum opening
Material:Precision C.N.C. machined 6061-T6 Aluminium
Color:Black hard coat anodized
Hardware:Stainless Steel
Made in :USA

The F63b is a common feature on all MS5 macro rails. As all Hejnar clamps is compatible with virtually any Arca style Quick Release plate.
Further, being offered as an add-on unit, it can be removed and mounted on other equipment if the end user wishes.

Hejnar Photo MS5_DSP with F63b QR Clamp
The slider is equipped with the larger Hejnar Photo F63b 3.25" (82mm) long Arca Swiss® compatible Quick Release clamp, where b at the end of the model name stands for long black knob.
Hejnar Photo MS5_DSP slider with clamp removed
The MS5 DSP slider is shown with the F63b QR clamp removed, revealing the two alignment dowel pins.
The slider top-platform is equipped with a tapped 1/4"-20 hole for the clamp mounting screw as well as with four opposing 5 mm dowel pin holes.
The clamp can be easily removed and reoriented in 90° increments, so as to place the clamp jaws either parallel or perpendicular to the slider moving axis and the srew-knob of the clamp at any side the user feels more convenient for its operation.

When the clamp is set perpendicularly to the slider as shown in the previous illustration above, then the wide clamping area becomes a convenient platform for lateral adjustment of the camera within the clamp.

The Arca Dovetail
As all Hejnar Macro Stages, the MS5_DSP is equipped with an Arca style dovetail, compatible with almost any brand Arca compatible QR clamps even RRS® lever release clamps.
Additionally an 1/4"-20 threaded center hole on the center brace of the rail allows for direct mounting on a pod with an 1/4"-20 stud.

Using the long bottom dovetail the camera to subject distance can be first adjusted by moving the whole stage within the limits of the QR clamp that is mounted on and then engage in extra-fine adjustments using the lead screw knobs.

Hejnar Photo MS5_DSP dovetail bottom view
As obvious in the above photo one M3 safety stop screw is placed at each end of the dovetail not allowing the large stage to fall off from a loosely tightened quick release clamp.

According to Hejnar Photo, the operational load capacity of their lead screw rails is up to 10 lb (4,53 kg) in vertical orientation (perpendicular to the ground), while it can be increased up to 15 lb (6,80 kg) in horizontal orientation (parallel to the ground).

I hope you found the information useful, thank you for viewing.
All Photos by courtesy of Hejnar PHOTO, © 2016 Chris Hejnar

Price & Availability:
Current price for the MS5_DSP Lead Screw Macro rail with Digital Scale is US$ 525.00 (+Shipping where applicable). Although the price is lowered, the MS5 DSP is one of the highest Hejnar products in value so quantities will be limited. Nevertheless the MS5 DSP is available for preorders from the 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. Coupon is valid only in the Hejnar Photo online store.

Referenced Articles:
Innovative Linear Motion MS5 DS4 Macro Rail with Digital Scale from Hejnar PHOTO Preview

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Updated Linear Motion MS5 DSP Macro Rail with Digital Scale from Hejnar PHOTO
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