Samyang 8mm Fisheye Focus Calibration Service
Infinity on the focus ring but nothing sharp beyond a couple of metres? The focus scale of the Samyang 8mm fisheye can be mechanically recalibrated at a fixed price.
Symptoms
- Samyang 8mm not sharp at infinity
- Focus ring distance scale is wrong
- Focus peaking shows focus much closer than the ring indicates
- Unreliable manual focus beyond 3 metres
If your Samyang 8mm fisheye is never sharp at long distances no matter what the focus ring says, the lens most likely needs a samyang 8mm focus calibration: the mechanical references of the focus scale are off. It is a well-known issue, fully repairable, and we fix it at a fixed price of €80.
The symptoms
- With the ring set to infinity, only subjects a couple of metres away are actually in focus.
- Manual focus becomes unreliable at any distance beyond roughly 3 metres.
- Focus peaking on a mirrorless or cinema camera highlights an area completely different from what the distance scale indicates.
A professional videomaker sent us his Samyang 8mm T3.8 VDSLR UMC Fish-eye CS II, which he was using on a Blackmagic 4K with EF mount. Focus peaking — essential with a fully manual lens like this — kept showing that with the ring on infinity, real focus sat at barely 2 metres. For real-world shooting that made the lens unusable.
What causes it
This is a known weak point of Samyang wide-angle and ultra wide-angle lenses: on some units the focus ring is not correctly adjusted at the factory, so the engraved distance scale simply does not tell the truth. The optics are fine — the mechanical reference between the ring and the actual focusing group is what is off.
Can you fix it yourself?
On a camera with focus peaking you can work around the problem by ignoring the scale entirely, but that defeats the purpose of a marked manual lens — especially for video work where you pull focus by the scale. A proper fix requires removing the focus ring and resetting the references against targets at known distances, with millimetre-level verification. That is precision bench work, not something to attempt on the kitchen table.
How we repair it
Our technicians performed a mechanical calibration of the lens. We remove the focus ring and, using standard targets placed at known distances, adjust every reference on the scale. To verify the result we mount the lens on a reflex body with known calibration connected to an external monitor, so the outcome can be checked with millimetre precision.
After calibration, this Samyang went from "infinity focuses at 2 metres" to everything beyond 6 metres perfectly sharp with the ring on the infinity mark — exactly as designed. We also verified the optical quality across the frame and cleaned the internal dust while the lens was open, at no extra cost. This service is part of our Samyang repair service.
Price and turnaround
| Service | Price |
|---|---|
| Focus scale recalibration | €80 (fixed) |
| Internal cleaning | Included |
| Final test & calibration check | Included |
Typical turnaround is 5 working days. Return shipping within the EU is a flat €20.
Ship your lens from anywhere in the EU — diagnosis is free and the repair is covered by a 6-month warranty. See how it works.
Frequently asked questions
Why is my Samyang 8mm not sharp at infinity?
On several Samyang wide-angle and ultra wide-angle lenses the focus ring references are not correctly adjusted at the factory, so the scale does not match the real focus distance. A mechanical recalibration fixes it.
How much does Samyang 8mm focus calibration cost?
Our fixed price is €80, including internal dust cleaning and a full functional check before the lens is returned.
Can I calibrate the focus scale of a manual lens myself?
The adjustment requires removing the focus ring and setting the references against standard targets at known distances, with the result verified on a calibrated body. Without that equipment you risk making the scale worse.
Does this problem affect other Samyang lenses too?
Yes, it is a known weak point of Samyang wide-angle and ultra wide-angle models. The same recalibration procedure applies.
