Omni Generation One - Focus, PPF (pixels per foot) & HFOV (horizontal field of view)
Get the best image and detail for the area covered
Most of these cameras were purchased with 2.8 lens and are a manual focus model camera.
The simplest way to accomplish this is by zooming into image and making small adjustments until best possible focus is captured
Regarding Pixel Density the example of recognition facial or Licence plate requires 100 PPF (pixels per foot) and a dedicated camera.
(not the case here but a frame of reference to start from)
Overall a good focus is important but there are PPF limitations on how much distance you can cover
Example is 20 MP (4 sensors at 5 MP) & different available lens options
When reviewing an image with a depth of 150 to 200 ft you must consider your HOV (horizontal field of view) you can change the Lens and capture more detail at at greater distance if you can capture your desired FOV
The larger zoom lenses require additional adjustment to compensate for the outer bubble.
When focusing the 6mm, 8mm, 12mm or 16mm lens options you will encounter a focus shift when installing the bubble. To account for this follow these steps:
1. Focus the camera without the bubble.
2. Rotate the lens per the chart below. The rotation will account for most of the focus shift.
3. Put cover with bubble on. You should be close to being focused.
4. Remove cover and rotate a couple degrees at a time in either direction until you gain the desired ¡mage.
Example: Using a 16mm lens you will focus the lens without the bubble until you get the desired image. Rotate the lens almost 75 % of a turn (250’). Put the bubble on and view the image. It should be almost in focus. Remove the bubble and rotate a degree or two ¡n one direction and view the image with the bubble on. Depending on the image you may need to adjust in the opposite direction or continue ¡n the same direction until the desired image ¡s obtained.