Focusing Entaniya 220°, 250° and 280° Lenses
If the 5mm C-Mount ring is on the camera, remove it. Also, remove the IR-Cut filter and holder. Add 4 or 5 of the set screws to the outside of the red mounting ring supplied with your lens. The black mounting ring that comes with the lens is for Hero4 Ribcage mods and is not required. Screw the red mount onto the camera until snug. Add a layer of Teflon tape to the barrel of the lens and thread it into the orange mount. We recommend attaching your camera to a high-res HDMI screen to set your focus. Once the image is perfectly sharp fix the lens in place by tightening the set screws around the perimeter.
ABOUT STABILIZATION AND VARIOUS LENS MODES
Stabilization
Hero5, 6 & 7 cameras come with a built in image stabilization feature, just keep in mind that it has some limitations when used with lenses other than the original GoPro lens it was designed for. As a general guide, like all forms of electronic image stabilization it will become less effective with more and more zoom. It works best with wide angle lenses or the original GoPro lens (included) but with longer focal lengths it’s recommended that you use a gimbal or tripod.
We also recommend trying out the free software ‘GyroFlow’. That software performs stabilization in post using the gyro data stored in the video files. It allows you to create a distortion profile for each of your lenses for a more accurate result. You also have access to a lot more tools to fine tune the output. You may find that you prefer to shoot with Hypersmooth turned off for maximum control in GyroFlow.
Linear Mode / SuperView
Linear mode is intended for use with a fisheye lens, or the original GoPro lens (included). When linear mode is enabled the camera firmware will correct for the fisheye distortion of the original GoPro lens. If you are already using a linear lens it will actually add a ‘pincushion’ distortion. SuperView is a mode that compresses the entire 4:3 image sensor into a 16:9 widescreen aspect ratio which usually results in undesirable distortion regardless of the lens being used. For those reasons we recommend using the camera’s ‘Wide’ setting for most shooting situations. The ‘Wide’ setting will use the maximum area of the image sensor for the best image quality without distortion.
Troubleshooting:
My camera turns off after just a few seconds! Use the side button to power on the camera instead of the top. Quick capture is triggered by default when you hit the top button so it will try and record. If no SD card is found it will simply turn off.
My footage looks pink! You need to install the supplied IR-Cut filter which prevents infra-red light from reaching the sensor. If your footage looks pink this filter is likely missing, or you are using an ‘IR corrected’ M12 lens which is designed for full spectrum & IR imaging. Most M12 lenses have the filter installed on the back but for CS, C-Mount and other lens types you will need to add it for normal use.
My C-Mount lens won’t focus!: This usually means that you simply need to add the supplied 5mm C-Mount spacer ring to the camera before adding your lens. It comes mounted on the camera with a plastic cap screwed into it.
Dark spots in footage, especially when iris is closed down: Your image sensor or filter needs to be cleaned. Using an air puffer is usually enough to blow away any small particles that might have gotten on the sensor. A LensPen MiniPro is also a great tool for cleaning the small GoPro sensor. Also verify that there is no dust or debris on the back of the lens.
Images are blurry on one side with M12’s: Likely your lens is not perfectly aligned with the image sensor. Some lenses have looser thread engagement than others which may cause a very slight tilt. Try adding a layer of Teflon tape to the lens barrel before adding it to the adapter ring as outlined in the tips.
When I shoot footage for 360° video, the image circle keeps moving around: When shooting content from circular fisheye lenses for stitching in 360° video software, make sure the image stabilization feature is turned off.
There’s a lag when I connect my H7PRO to HDMI!: Turn of the image stabilization in the settings to remove the delay.
NOTE: We’ve done our best to accommodate the vast majority of M12, CS and C-Mount lenses on the market, however there will be some designs that aren’t compatible. M12 lenses that are extremely short, have odd shaped barrels or short threads may not work. The lenses at www.back-bone.ca have their compatibility clearly marked. When buying M12 lenses elsewhere look for 1/2.3” or 1/2” lenses that have an IR-cut filter built in for normal color. If you want to perform full spectrum or infra-red imaging look for ‘IR-corrected’ lenses. We recommend 1/2”, 1/1.8” or 2/3” C-Mount lenses with high resolution ‘megapixel’ optics.