Sirui K-40X Ball Head

Sirui K-40X Ball Head

Sirui K-40X Ball Head

B&H # SISUK40X MFR # SUK40X
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Product Highlights

  • Knobs for Pan, Tilt & Tension
  • 77 lb Load Capacity
  • Quick-Release Plate with Anti-Twist Pins
  • Arca-Style Clamp for Quick Release
  • 90° Tilt, 360° Pan
  • CNC-Machined Aluminum Alloy
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Sirui K-40X overview

  • 1Description

The Sirui K-40X Ball Head is an extremely sturdy head with control knobs for pan, tilt, and tension, plus an Arca-style clamp for the included quick-release plate. The pan, tilt, and quick-release knobs are all separate, while the tension knob is integrated into the ball-locking (tilt) knob. The head tilts 90° for portrait orientation. There's also a video pin on the plate to keep camcorders from twisting.

The interior ball locking of the K-40X head has a sphere tolerance of 0.01mm, and it's equipped with an orientation-memory locking dial. This helps yield a high load capacity of 77 lb. The quick-release clamp features a secondary release button that prevents any inadvertent disengagement of the camera/plate from the clamp, thereby adding to the head's overall security and stability. The Arca-style platform conforms to standard sizes, so you can use compatible plates from other manufacturers.

The three control knobs allow a photographer to exercise extremely fine control over the orientation of the camera, whether it's a DSLR, 35mm, medium-format camera, or even a camcorder. Pan, for instance, can be adjusted while the tilt stays locked, enabling precise movement that's measurable – there are degree markers at the panning base for panoramic photography.

The K-40X is CNC-machined from an aircraft-grade aluminum alloy and anodized with an oxidation treatment that ensures a durable, high-quality finish.

Arca-style quick-release clamp with secondary safety lock
Two bubble levels (horizontal and vertical) on the quick-release platform ensure that your framing hews to the horizon in either portrait or landscape orientation
The friction-control knob, integrated into the ball-locking knob, allows the operator to adjust the resistance of the ball's movement
Quick-release plate is aluminum alloy with a rubberized surface
Stainless steel camera screw
In the Box
Sirui K-40X Ball Head
  • Quick-Release Plate
  • Pouch
  • Allen Key
  • Limited 6-Year Warranty
  • Table of Contents
    • 1Description

    Sirui K-40X specs

    General
    Head Type Ball Head
    Base Mount 3/8"-16 Thread
    Camera Mounting Screw 1/4"-20 Male
    Quick Release Plate Type Arca-Type
    Load Capacity 77 lb / 35 kg
    Number of Bubble Levels 2
    Friction Control Yes
    Independent Pan Lock Yes
    Pan & Tilt Range
    Panning Range 360
    Physical
    Ball Sphere Diameter 2.13" / 55 mm
    Dimensions H: 4.9" / H: 125.0 mm
    Weight 1.5 lb / 0.7 kg
    Packaging Info
    Package Weight 2.1 lb
    Box Dimensions (LxWxH) 6.0 x 4.9 x 3.8"

    Sirui K-40X reviews

    K-40X Ball Head is rated 4.8 out of 5 by 96.
    Rated 1 out of 5 by from Worst customer service I purchased this 40-K ballhead and was fine until I started to have issues with knobs in a year of light use, all of them are out of my control, rubber is loose and I stuck with my Nikon D810 and nikkor 24-70. I need tools to take it out, would fall off in field and ruined my planned trip. Customer service is terrible as agreed by more than 31 customers in this review, called their US office and solutions to enforce their 6 yrs warranty is insane. Called b&h but no solution as it's a manufacturer warranty not themselves. I will contact a manager in b&h to review the case and find a solution for their customer service that it's totally comprising and ruins b&h image.
    Date published: 2016-11-08
    Rated 3 out of 5 by from Nice Ball Head, terrible warranty srvc I purchased this ball head about a year ago. I was initially thrilled at how solid it felt and held even a pro DSLR with 1,000mm of glass on it, but after a year it developed play in the pan axis. I tried to get service/support from their US distributor WHO REFUSED TO HELP ME. I now have a boat anchor. I liked the initial product design and quality but will never buy a Sirui product so long as the present distributor is in place. The warranty is worthless.
    Date published: 2015-04-05
    Rated 5 out of 5 by from Great Product - even better price I ordered the Sirui K-40x at the recommendation of friends and confirmed by B&H. The Ball Head is robust, clean well thought out and manufactured with great care and precision. The quick release plate is solid and works well. I just finished a shoot using the Sirui K-40x with a Canon 5DIII and a 70-200 2.8 loaded on it, the operation was smooth precise and solid I didn't feel any creep at any time and was able to reach and operate the tension knob with precision and ease. The pan knob is well located and with a bit of use I got use to the feel. Overall this was a great recommendation as I am exceedingly happy with this Ball Head. I highly recommend this product.
    Date published: 2015-02-18
    Rated 2 out of 5 by from For Heavier Weights... Not Quite For A Few Reasons This is a good bang for the buck ball head for weights well under the specified 77.1lbs. I have a couple of specific uses that I need it to perform for: 1. It must be able to happily hold a 400mm 2.8 with my d810 and grip. I doesn't. Both the plate and ball head drift don't work for me. The plate is a lighter weight Arca-Swiss style plate the lacks heft and isn't grippy enough and the ball sags a bit after setting and tightening. I want zero drift/sag which when zoomed in for macro work or ultra zoom distances, is a big deal/pain. 2. I need it to work on a RigWheels magnetic plate to support an FS7. I just don't trust it after my SuperMoon experience with the 400 2.8 above. My loads are in the 12 to 25lb range and I wouldn't recommend this ball head for those loads. For lighter weights I think it would be just fine and perform well. I was hoping it would work for me because it has many good reviews and a very attractive price. FLM here I come. and... scene.
    Date published: 2016-11-17
    Rated 5 out of 5 by from Incredible Quality - Price/Value Ratio I can't say how pleased I am with this ball head. I very nearly spend twice this on a well know and loved head. As many of you the DP Review swayed me. I figured with B&H's fantastic return policy - if I wasn't delighted I'd return it. You couldn't pry this out of my hands now! First, the name is misleading - it's not a 40mm ball as you'd think at this price! It's 54mm, and the thing is an absolute beast! This is truly full size - so do be aware. 3 spirit levels make sure that you're not going to be confused regarding positioning. The styling of the device takes a little getting used to though - although those odd scallops actually do help in as much as making it easy to grip with gloves on! It absolutely laughs at a 6D, grip, 70-200 f2.8. It's overkill. The movement and friction of the head is super smooth and linear. The panning has blown me away - I won't hesitate to get a sidekick it performs so well. Even the little friction adjustment screw in the locking knob is easy to operate. It's truly a joy to handle and use. I've been so impressed with this company I bought their M3204X tripod. This replaces years of Manfrotto gear. My only other sources of reference in comparison would be Gitzo and RRS to start with, and the Sirui product stands tall with the rest of them. I see why they're winning awards like crazy. Highly recommended - what have you got to lose? B&H will happily take it back - but they won't have to!
    Date published: 2014-03-14
    Rated 5 out of 5 by from Huge value for the money I bought this used from B&H as a last minute replacement for a failed monopod head. Not much research was done as I was a little hurried to get it before a shooting weekend. I'm ecstatic to say it does the job perfectly! I have used it with the Canon 500mm f4L IS and 600mm f4L IS along with a Gitzo GM5561T (the big travel monopod) primarily and never thought I'd be able to get off this inexpensively for this kind of gear! My cheap gamble has worked thus far. It even feels like it was made for the wideness of that Gitzo. My intention was to sell this off after the weekend, but I think I'm going to keep it. One of my favorite surprise purchases: 5 stars!
    Date published: 2015-02-07
    Rated 5 out of 5 by from A rare find! This is an amazing ballhead. I had been using a Kirk BH-3 but it was not sturdy enough for my Nikon D-800 with 70-200 f/2.8. This Sirui K-40x does the job smartly. After upgrading to a new Gitzo GT2542 tripod, an expensive BH-55 was not in the budget. No matter, I think this Sirui is just fine. You can hang a cow of of this thing! I discovered this ballhead on dpreview.com, they did a comparison of the big ballheads and rated this one higher than the RRS. You can't go wrong with this one. I'm going to get a smaller Sirui for hiking.
    Date published: 2015-03-22
    Rated 5 out of 5 by from This is a great Ball Head!! I use this beautifully built head for Macro/close-ups, Bird Photography and Landscapes. I replaced both a large pan/tilt tripod head and a small ball head. I especially like the fact that although I can pan & tilt with light friction settings, I can still easily move my 100-400mm telephoto lens with a 1.4 extender and not worry that it will sag or fall. There is nothing not to like!
    Date published: 2015-05-20
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