Sirui K-40x Ball Head

Model #BSRK40

Sirui bsrk40 1
Sirui bsrk40 1
Sirui bsrk40 2
How it works
  • You name the price you want to pay for a product.
  • We send your offer to a network of Certified Retailers.
  • If the retailer likes your offer, you get that price for the product.
Greentoe Guarantee
  • All Products are New and from Manufacturer Authorized Retailers
  • 30 day return policy
  • Free Shipping
    No Additional Fees

Name your price


Lowest Price Online: $163.00 ?


Your Chances of Success
lowest price online $163.00
average price online $163.00

Your chances of success

Online Prices
We have done the shopping for you! Here is a list of the lowest prices currently found online. With Greentoe, the price will be lower than these prices. “Name Your Price” and find out.
Enter your zip code to see how much we will be saving you!
Showing prices for zip code 94103 change
Retailer Base Price Tax Shipping Total
Amazon logo $163.00 $0.00 $0.00 $163.00
**Pricing is for informational purposes. Not all retailers have direct relationship with Greentoe.

General Information

Load Capacity 77 lb (35 kg)
Ball Sphere Diameter 2.13" (55mm)
Quick Release Yes, with Arca-style plate
Spirit Level Yes, 2
Tension Control Yes, integrated into tilt-control knob
Separate Panning Lock Yes
Pan 360°
Tilt 90°
Head to Tripod Mounting Thread 3/8"-16 Female
Camera Mount Plate 1/4"-20 Male
Height 4.92" (12.5 cm)
Maximum Diameter Not specified by manufacturer
Weight 1.54 lb (0.7 kg)
User Reviews
B h photo.34921152
17 November 2016

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.

B h photo.34921152
4 weeks ago

I purchased this ball head for my Sirui N2004SK tripod, and the pair is unbeatable. I live in Alaska and shoot wildlife, aurora borealis and landscapes, often with a long telephoto.

B h photo.34921152
16 February 2019

I bought this ball head in Jan. 2016. It has been used not many times. Recently it suddenly got stuck. No matter how I rotated the knob the ball is very hard to move, certainly not usable. The temperature here innorthern California was around 45F, not particularly cold.

B h photo.34921152
13 November 2018

The K-40x is a steady, smooth ball head. It takes no time to learn and works beautifully. Mine is mounted on an Oben tripod. Great combination. Holds my Nikkor 200-500mm with d850 mounted to it. To buy a second plate for mounting is a bit pricey. Otherwise, its a terrific ball head.

B h photo.34921152
9 November 2018

I bought this thinking the 70 pounds rating would be a nice overkill for my DSLR. Well, it may be too much of a good thing. I love the way it operates and feels. However I suspect I would be just as happy with the next size down for my application.

B h photo.34921152
6 November 2018

A little heavy for carrying with you on long hikes but this is the best ball head I have ever used. Rock steady and very easy to use.

B h photo.34921152
19 August 2018

I took my tripod on vacation for 10 days of landscapes and wildlife in the west, from Monument Valley to Devils Tower. The new Sirui K40 took all situations in stride. With the 200-500 zoom, the friction controls partly tightened, I could catch the deer and the antelope playing.

B h photo.34921152
17 April 2018

I needed a larger head to stabalize my D850 and longer lenses. Most of the stuff out there is in the $400 range. This has the same diameter ball, smooth and rock solid locking mechanism and no extra weight at half the price

B h photo.34921152
10 December 2017

I bought this to replace a Monfrotto head for my Monfrotto tripod. Needed something easy to adjust, but extremely secure. Canon 5D MK4 with 100-400 lens needs to be really stable to avoid vibrations. This did the trick. I have a Sirui k-20x, but it isn't adequately stable for my needs.

B h photo.34921152
20 November 2017

Very rigid for my Nikon D500 and the pan feature is very handy.

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
In The Box
  • Sirui K-40X Ball Head
  • Quick-Release Plate
  • Pouch
  • Allen Key
  • Limited 6-Year Warranty
Still Have Questions?
We can help via Live Chat, Email or you can call us 1-888-840-0464


Please log in or sign up to continue


Validating Credit Card...

It will not be processed until the offer is accepted by a merchant.

Notifying Retailers...

Notifying our merchants and checking to see if they accept this offer.

Offer Submitted!

3-digit code in the back of your credit card