The MAVIS viewfinder is really powerful. With support for False Colour and Focus Peaking we were the first to provide access to professional high quality visualisations on the iPhone. With the launch of MAVIS v2.0 we have added support for hardware accessories such as the Anamorphic Moondog Lens and Beastgrip DOF adaptor. With real-time image de-squeeze or image flip you can now easily frame your shots. We have also changed the way we support 4K (4:3) so you have the best possible experience when you're shooting at maximum resolutions.
The MAVIS data flow is different from other apps because of the way we have chosen to seperate the viewfinder from the recording. This means that the image you see in the viewfinder can look very different from the one that is being recorded. This allows MAVIS to apply both image visualisations (e.g. focus peaking) and image warps (e.g. de-squeeze) without the recording being affected. See diagram below:
It is important to understand the way we have structured the data flow in MAVIS because it means the image captured by the recording may be different from image you see in the viewfinder. We have chosen to structure MAVIS in this way for two critical reasons:
(1) so we can apply image visualisations without them appearing on the final recording
(2) to allow final image warps to be done in post production
Warping images in real-time on an iPhone produces sub-standard results and, although it is acceptable for a viewfinder, we want to provide you with the best possible quality for your productions. To achieve this we only ever record the raw camera data provided by the iPhone OS.
The viewfinder de-squeeze squashes the vertical axis of the viewfinder by 33%. With an input frame ratio of 16:9 (1.778:1) this results in output ratio of 2.4:1 with black bars across the top and bottom of the viewfinder.
The viewfinder flips the vertical and horizontal axes of the viewfinder.
This setting only works when the camera is in 4:3 mode. The viewfinder scales down both the vertical horizontal axes of the viewfinder by 25%. The allows a 4:3 image to be shown in a 16:9 frame and results in black bars along the left and right of the viewfinder.
This setting only works when the camera is in 4:3 mode. The viewfinder first scales down both the vertical and horizontal axes of the viewfinder by 25%. It then stretches the resulting hotizonal axis by 33%. The end result is a 16:9 image.