If you have a mirrorless Sony A6000 with the 16-50mm zoom lens you can use our Olympus adapter via the 40.5mm filter ring threads.
Direct eyepiece projection digiscoping means that the camera lens has been eliminated and the image is shone directly onto the camera sensor element. Effectively, the spotting scope is acting as the camera lens.
This means that the image will be in focus only at the center and the further away the more vignetting or blurring can be expected. The advantages are greater magnification and lighter setup, the disadvantages are lower image quality and manual lens operation. Most digiscopers as result prefer the T-Mount Adapter that keeps the lens in the system.
Short focal length lenses work best for digiscoping. Canon and Nikon make 50mm f/1.8 lenses that are not too expensive that are perfect for digiscoping. The Pentax 40mm f/2.8 lens works well if you have a Pentax camera.
Because less light reaches your camera’s sensor when using a large lens (or a spotting-scope, in this case) your camera will need to be adjusted to compensate. The table below shows the effect of various shutter speed and ISO settings on the brightness of the picture.
These settings can be adjusted by setting your camera to “Manual”. Refer to the camera’s instruction manual for further details.
All pictures were taken at dusk, using a Canon EOS Rebel T3 mounted on a 20-60x80mm spotting scope.
For a PDF of this and other direct project digiscoping tips get the Direct Projection Digiscoping Tips guide.
Most customers find that the Novagrade T-Mount Adapter best fits their needs. It allows you to use your camera features such as through-the-lens focusing, automatic exposure, vibration compensation and automatic face recognition technology.
Because the human eye focuses very differently than your camera, you will have to adjust the focus on your spotting-scope/binoculars upon mounting your camera. Sometimes the difference in focus can be significant, making the image appear all white.
Eyepieces vary greatly in how much rotational force is required to turn them. A tablet with an offset camera will naturally induce a torque to the eyepiece. If this torque is more than the frictional resistance of the eyepiece it can turn. Fortunately camera software automatically rotates the image regardless of portrait or landscape mode.
To avoid this problem simply use the tablet adapter at either minimum or maximum zoom settings only then position the tablet so its self weight is acting against the zoom stop.
Put the camera on its full manual settings, disable autofocus, and set the lens aperture wide open. Adjust your camera’s shutter speed to obtain the proper image exposure.
You can purchase Novagrade adapters here on novagrade.com, other online suppliers, and many local camera and optical dealers.