¶ Tripod and ball head installation instructions
¶ # 1. Required parts
- Ball head (for mounting the camera)
- Tripod (high strength model recommended)
¶ # 2. Installation steps
¶ # 1. Install the tracker to the tripod
First, fix the 3/8 threaded interface at the bottom of the tracker to the tripod.
-
If the tripod is 3/8 threaded:
The tracker can be installed directly. -
If the tripod is 1/4 thread:
It is necessary to use 1/4 to 3/8 thread adapter before installation.
When installing, make sure:
- Thread fully locked
- The connection is firm and without shaking
- The tripod is in a stable supporting state
Suggested:
Try to use the tripod without a head or the tripod head to avoid shaking caused by additional structures.
¶ # 2. Install the ball head
Attach the ball head to the top of the tracker.
Since the top of the tracker uses a 1/4-20 thread, use the included:
1/4-20 to 3/8 inch adapter screw
When installing:
- Tighten clockwise
- Appropriate pressure can be applied
- Make sure the gimbal is not loose
The camera can then be mounted on top of the ball head.
¶ 3. Why use a ball head (instead of a fluid head)
In star-field astrophotography, ball head is recommended, while fluid head (video head) is not recommended.
The main reasons are as follows:
¶ # 1. ball head has higher rigidity
The ball head has a simple structure:
- Almost no internal displacement after locking
- Strong resistance to micro deformation
- More suitable for long exposures
And the fluid head:
- Internal damping structure
- Long-term stress may cause slight slippage
- Will cause star points to smear
For star-field astrophotography, micron-level displacement will affect the imaging quality.
¶ # 2. The ball head is more suitable for quick composition.
star-field astrophotography requires:
- Quickly adjust direction
- Accurate lock posture
Ball head:
- Single knob lock
- High adjustment efficiency
- More suitable for field operations
Hydraulic PTZ is more suitable for:
- Video shooting
- Smooth motion following
Not suitable for starry sky photography scenes.
¶ 4. How to choose a suitable tripod
The stability of the tripod directly determines the tracking accuracy.
A tripod with insufficient load-bearing capacity will seriously affect the shooting quality.
¶ # Suggested selection criteria
Preference:
- Metal structure (tripod legs are recommended to be aluminum or carbon fiber)
- Rated load capacity ≥ 2–3 times the actual equipment weight
- Equipped with 3/8 threaded interface
For example:
If the total weight of the equipment is:
- Camera + lens + equatorial mount ≈ 3 kg
Recommended tripod:
- Nominal load capacity ≥ 8–10 kg
¶ # The impact of insufficient load-bearing
When the tripod is not rigid enough:
May appear:
- slight vibration
- Swaying in the wind
- Long term deformation
The final performance is:
- Star trailing
- The stars are not round
- Difficulty focusing
- Tracking accuracy decreases
Even if the equatorial mount itself performs well, 's unstable tripod can still lead to failed shots.
¶ 5. Why should we lower the tripod center column?
It is recommended to lower the tripod center column as much as possible or completely retract it.
This is one of the key factors affecting stability.
¶ # Raising the center column will reduce stability
When the center column is raised:
Equivalent to:
Add a slender post to the top of the tripod
This results in:
- Rigidity is significantly reduced
- Reduced torsion resistance
- Easier to shake
Especially in:
- Telephoto lens
- Windy environment
- long exposure
The impact is more obvious.
¶ # Recommended practices
Priority:
- Adjust tripod leg length
- Keep the center column in the lowest position
- Fully retract the center column if necessary
Only if:
When the height is indeed insufficient
I just considered slightly raising the center column.
¶ 6. Additional stability suggestions (recommended)
In order to obtain a higher shooting success rate, it is recommended to:
- Tripod fully extended
- Increase the tripod leg angle appropriately
- Hang a counterweight (such as a camera bag) under the tripod
- Avoid soft ground (sand, loose soil)
These measures can significantly improve tracking stability.
¶ 7. Summary of key principles
In star tracker system:
stability takes priority above all else.
Please always follow:
- Use a highly rigid tripod
- Use a ball head
- Lower the center column
- All threaded connections must be fully tightened
By doing the above four points, the success rate of star-field astrophotography can be significantly improved.