Non Fisheye GoPro - Remove
Distortion Effectssachange lens telephoto
drone quadcopter 4k rc 4.35mm 5.4mm
GoPros are great cameras but the 170 degree
fisheye lens is not suitable for all applications. It produces lots
of distortion effects around the edges
of the scene. This is fine for action sports, where you want to include
as much peripheral vision as possible. For other pursuits such as drone
photography or for a general purpose camcorder we prefer a narrower
non fisheye lens. It is difficult to find GoPro action cameras that
have a non fisheye lens, as most come with a fisheye 170 degree lens
There are two approaches to removing distortion effects. You can modify
your existing Gopro camera to add a non fisheye lens, or you can buy
a Gopro style camera with a narrower non fisheye lens pre-installed.
We tried to change the lens on an SJCam SJ4000 and found that the process
is difficult. We therefore set about sourcing a Gopro type camera with
the gopro non
fisheye distortion effect lens pre-installed. The result is our
Vision camera that is designed to be a general purpose camcorder for
both action and non-action uses.
Modify your GoPro Camera
It is possible to modify a GoPro or SJCam to change the lens for a non-fisheye
one. However the process can be difficult and there is a risk of damaging
the camera. You have to unscrew and remove the original lens. It is
fastened with an M12 thread and threadlock has been applied at the factory.
It takes a lot of force to break the threadlock. You have to grip the
original lens with pliers to unscrew it, and there is a danger of damaging
the mount by applying too much force. Also when installing the replacement
lens it has to be screwed in to the correct distance to set the focus.
This can be challenging, and sometimes you meet resistance from the
old threadlock that stops it screwing in correctly. We know this because
we fitted a 4.35mm zoom lens to an SJCam SJ4000 ourselves to give a
linear image. You can see footage from our modified
camera in our sample
Buy a Camera with the Lens Preinstalled
A more simple and reliable solution is to purchase an action camera
that comes with narrower lens installed. That is what we set out to
achieve with our Vision model. We chose 120 degree diagonal FOV (3.3mm)
to be halfway between the very wide 170 degree, and the almost linear
4.35mm. The 4.35mm lens is good for general purpose photography and
drones, but less suitable for action as the vibrations are magnified.
By going halfway between the two the ~100 degrees horizontal view is
suitable for both action and general purpose photography. There is still
some curvature at the edges of the image, but it is less noticeable
than with the standard super wide angle viewpoint.
big advantage of the Vision is that it comes with great replacement