Will it fit my lens?
If the diameter of the lens at the focus ring is between 56mm and 98mm, then it will fit. This covers most lens sizes, with the exception of a few large zoom lenses, and some small micro 4/3 lenses. The Follow Focus Shifter is adjustable to fit that size range. The FocusShifter works best with prime lenses. If you have a Zoom lens, there must be at least 10mm of non-rotating space between the Focus and Zoom ring for mounting the marker board.
Does it work on Zoom Lenses?
For FocusShifter to work on a zoom lens with the markerboard, there must be at least 10mm of non-rotating space between the Focus and Zoom ring for mounting the marker board. Otherwise the marker board will have to be mounted to the zoom ring, in which case the zoom ring needs to be fixed with tape or an elastic band to prevent rotation. It's not recommened to change the zoom of a zoom lens while shooting video. You will lose the focus points, because the focus also changes as you zoom.
Will it fit Micro 4/3 Lenses?
Most micro 4/3 lenses are larger than the 56mm minimum diameter, however there are a few that are smaller, like the Olympus M. Zuiko Digital ED 45mm f/1.8 Lens. Please check the diameter before ordering, and you can send us a request for a custom shifter to fit even the smallest lens.
What cameras does this work with?
Follow Focus Shifter will work with any camera that has an external lens with a focus ring. This covers all DSLR cameras, including but not limited to Canon EOS 5D Mark III, Canon EOS 5D Mark II, Canon EOS 7D, Canon 60D, Canon T4i, Canon T3i, Canon T2i, Nikon D600, Nikon D7000, Nikon D5100, Nikon D3100, Nikon D90, Olympus E-5, Pentax K-5, Sony Alpha SLT-A99V. It also works with Micro 4/3 rds cameras, as long as the diameter of the focus ring on the lens is between 56mm and 98mm.
Why is the Marker Board curved the way it is?
The Marker Board was carefully designed to fit a wide range of lenses, from 56mm to 98mm in diameter. The picture illustrates how the curve conforms to the different sizes, while maintaining only 2 points of contact.
I can't get the FocusShifter belt tight around my lens.
To pull out the slack, and tighten the belt, you have to turn the ball at the top clockwise. The first time that you adjust it to fit your lens, you may have to turn it quite a lot to tighten up, because it allows for very fine tuning. To open up the belt, turn the ball counterclockwise.
Can I change the belt if it breaks?
The belt is fiberglass reinforced neoprene, and will not break under normal use, so there will be no need to replace the belt.
What is the FocusShifter made of?
The body is made of Dupont Zytel, a high strength plastic. The internal components are made of Stainless Steel, and Brass. The belt is fiberglass reinforced neoprene.
What makes FocusShifter better than a geared follow focus?
- Much less expensive (obviously)
- No need for rails, can be used standalone with no extra gear.
- Easier and faster to setup.
- No backlash (inherent in lower cost geared follow focus)
- Good for run-and-gun type shooting.
- Focus marks are easy to see from behind the camera, which is where the screen is!
- Simple to use hard stops
- Lighter weight.
What makes FocusShifter better than other lever type follow focus devices?
- More secure attachment than the ultra simple follow focus.
- Balanced design! Focus does not change when you release the lever, even if the focus ring is loose, or your moving the camera around, like on a rig.
- Has a marker board.
- Higher quality materials are used.
- No velcro!