ARRI ALEXA Mini LF User Manual page 122

Appendix
Frame Line & Lens Illumination Tool
The Lens Illumination Tool is an interactive visual guide that shows how different lenses illuminate
different sensor modes and target aspect ratios of ARRI ALEXA, ALEXA Mini, ALEXA Mini LF and
AMIRA cameras. The LIT is meant as a first step, and as a guide only - we strongly recommend
that you shoot your own tests to determine the exact behavior of the lenses you plan to use. Each
lens type is designed to cover a certain image circle, within which the manufacturer upholds image
quality criteria, including illumination. Lenses still show an image outside of this image circle, but of an
undefined image quality. Farther out from the image circle there is a point at which there is no more
light, defining the 'illumination circle'. The size of the illumination circle changes based on lens design,
focal length, focus setting and iris setting, which is why we have provided tools for playing around
with all those parameters. All lenses are brighter, and have a better image quality in the center than
in the corners, though light distribution differs vastly between lenses. This guide allows you to take a
look at how much illumination there is within a given sensor mode and target aspect ratio. The guide
only shows illumination and not any other image quality parameter. It was created by shooting a gray
chart with each lens as a rough guide; please note that based on image content your results may vary.
For each lens type and focal length, the chart was created by using one particular physical lens (not
design data), and we display the serial number of that lens. Based on the manufacturing tolerances
and service history of the lenses out there, your results may also vary. The tool accommodates ARRI
Signature Primes, the ARRI Ultra Wide Zoom, all ARRI Master Primes (except the 14mm Master
Prime), the ARRI Master Macro, all ARRI Ultra Primes, the ARRI Alura Studio and Lightweight Zooms,
and the Cooke Mini S4 18, 25, 32 and 40mm. It's also now possible to upload frame lines (created by
you, or other users, with the ARRI Frameline Composer) into the LIT. This enables direct comparisons
between different lenses within the particular frame lines.
► Frame Line & Lens Illumination Tool
Formats and Data Rate Calculator
The ARRI Formats and Data Rate Calculator (FDRC) is an online tool that calculates the record
duration and data rates for different camera settings (combinations of camera model, codec, resolution,
project rate, sensor speed, recording media, audio on/off). It also gives deeper insight into available
recording formats and camera modes. The section "Format Preview" lists the sensor and recording
resolution for each recording format as well as a graphical preview for both sensor and recorded clip.
► Formats & Data Rate Calculator
LUT Generator
Generally speaking LUTs (Look Up Tables) are used to manipulate image data. The LUT transforms a
digital signal to adjust the sensitivity, gamma and provide a color correct monitoring input. Nowadays
on-set color correction is not a novelty anymore, nevertheless Look Up Tables are still needed to
convert ARRI's Log C to a viewable format (e. g. REC 2020 or REC 709) or an otherwise needed
format (conversion to linear space for VFX). Our LUT Generator can create the LUT you need.
► LUT Generator
Camera Simulator
The camera simulator is an interactive learning tool to familiarize yourself with the menu navigation of
ARRI digital cameras. The main user interface on the viewfinder shows a simulation of the real camera.
If you choose „Explorer" from the top-bar you can explore all bits and pieces around the camera, its
connectors as well as the viewfinder. Get started now and learn first hand the simple, straightforward
menu system that only the ARRI digital cameras offer.
► Camera Simulators
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