May 18, 2017

Hejnar Photo H125 Replacement Foot for Sigma 150-600mm f/5-6.3 DG OS HSM Sports Lens

Hejnar Photo H125 Replacement Foot for Sigma 150-600mm Sports Lens

As I had mentioned in a past article Sigma is one of the few lens manufacturers that had available a replacement foot -compatible with the Arca dovetail standard- simultaneously at the release of their highly regarded 150-600 mm f/5-6.3 DG OS HSM Sports telephoto lens. But selling at a somehow exaggerated price compared even to the highest premium priced products, fact that made it unattractive to users.

In December 2015 nevertheless, Sunwayfoto had released their version of a Replacement Foot for Sigma 150-600mm f/5-6.3 DG OS HSM Sports at a very attractive price, but again missing some length for some, to make it the ideal foot replacement.

As it is never too late, Chris Hejnar has just introduced Hejnar H125 replacement foot for the Sigma 150-600 mm f/5-6.3 DG OS HSM Sports, with a style and length to meet the unfulfilled desires of the Sigma telephoto lens users.

The H125 Replacement Foot

Manufacturer Specification:
Model:H125
Length:17.78 cm (7.0")
Width:4.27 cm (1.68")
Height:3.25 cm (1.28")
Tapped Holes:1/4"-20 & 3/8"-16
Safety Stop Screws:2 x M3
Weight:220 gr (7.7 oz)
Color:Black hard coat anodized
Material:C.N.C. machined 6061-T6 Aluminium
Made in :USA

The Hejnar H125 Replacement Foot carries the same design characteristics with the Hejnar H110 and the Hejnar H112 feet intended for Canon telephoto lenses, but to the content of Sigma users, at 7" is longer than both to aid balancing the long Sigma zoom lens.
Much like the forementioned products it is precision CNC machined out of a solid Aluminium block with a curved and textured top acting as a non-slipping grip in order to facilitate carrying the quite heavy lens.

Hejnar Photo H125 Replacement Foot for Sigma 150-600mm Sports top
Top curved hand grip of Hejnar Photo H125 Replacement Foot for Sigma 150-600 mm f/5-6.3 DG OS HSM Sports lens

The front part provides a flat section featuring a double dovetail, able to accommodate a flash bracket or any other device with an Arca compatible clamp on the top dovetail.

Hejnar Photo H125 Replacement Foot for Sigma 150-600mm Sports front
Front dovetail detail of Hejnar Photo H125 Replacement Foot for Sigma 150-600 mm f/5-6.3 DG OS HSM Sports lens

The H125 foot bottom is deeply carved with only a central brace, where two tapped holes lay side by side, one hole is threaded 1/4"-20 and the other 3/8"-16. These threaded holes may serve for direct mount on any kind of pod with an equivalent stud.
Two M3 safety stop screws are also provided and pre-installed one at the front end and one at the rear end of the foot.

Hejnar Photo H125 Replacement Foot for Sigma 150-600mm Sports bottom
Hejnar Photo H125 Replacement Foot for Sigma 150-600 mm f/5-6.3 DG OS HSM Sports bottom details

Unlike other makes, Hejnar decided to make the collar mounting block almost solid with only a center hole for weight relief. It adds a little weight but has better vibration absorption.

Hejnar Photo H125 Replacement Foot for Sigma 150-600mm Sports mount block
Hejnar Photo H125 Replacement Foot solid mount block detail



Installation on the Lens

Replacement of the Sigma collar foot is quite straightforward and easy for anyone that can handle an Allen hex key. The four mounting screws on the original Sigma foot should just be unscrewed and removed, using the appropriate 3 mm Allen hex key provided with the Hejnar replacement foot for this purpose. Another 2.5 mm key is provided for the M3 safety stop screws which are pre-installed at the bottom of the foot.

Hejnar Photo H125 Replacement Foot for Sigma 150-600mm Sports w/ hardware
Hejnar Photo H125 Replacement Foot with accompanying Allen keys

Using the same four screws, one needs just to screw back and secure the Hejnar H125 replacement foot onto the lens collar.
It is recommended to use a thread locking compound like Loctite 242 (blue) or any other equivalent product of medium strength for small screws. This will prevent the screws from loosening up in the future.

Compatibility
According to Hejnar Photo the dovetail design and dimensions of the H125 FOOT conform fully to the Hejnar Photo standard, therefore compatible with Kirk®, R.R.S.®, Arca-Swiss®, and many other Quick Release clamps that have adopted the Arca-Swiss style.

Photos by courtesy of Hejnar Photo ©2017 Chris Hejnar

Price and Availability:
Current price for the Hejnar H125 Replacement Foot is US$ 95.00 (+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 the current valid Hejnar Photo discount coupon before ordering.

Referenced Artcles:
New Replacement Foot for Sigma 150-600mm f/5-6.3 DG OS HSM Sports from Sunwayfoto

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