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Sigma fp (usability) issues
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This is a collaborative document for collecting and listing usability issues of the Sigma fp camera with the current firmware (1.01). It will be submitted to Sigma as a bug report.
If you contribute, please only report issues that can be fixed with a firmware update.
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1 - Bugfixes
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general (both stills & video)
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SummaryDescriptionSuggested fix
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Touch screen to move zoom centreVery time consuming to move the zoomed in part of the screen. Touch to choose a point then use the dial to zoom around
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Touch for QSLH touch to select, RH scroll the wheel
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video specific
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SummaryDescriptionSuggested fixuser comments
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CinemaDNG not standard-compliantCinemaDNG files are not recognized by Davinci Resolve, Adobe Premiere and other programs because DNG sequences and .wav files have asynchronous timecodes and frame ratesMake CinemaDNG files standard compliant so that they recognized by Resolve and other compatible programs.
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Black level changes during recording at certain ISOs on firmware 1.02The black level of captured 4K 12bit CinemaDNG sequences still "jumps" at certain ISOsMake sure black level is stable and doesn't flicker regardless of ISO settinghttps://youtu.be/gAE19PptAVQ
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video recording unresponsive after using UVCafter plugging into a computer and using selecting UVC for a while, then unplugging recording will stop functioning. When starting a recording afterwards, the display overlay will freeze, the onscreen video will remain live, but all buttons become unresponsive. Even turning off the power does not turn off the camera. To restore functionality you must remove the battery or disconnect AC power. Still photos still work, however, you need to do a setting reset in order to restore video functionality
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audio level adjustment is deeply buried in a submenuaudio levels can only be adjusted when going deep into the camera menusmake audio levels available on the QS menu, and optionally on the rear dial
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audio levels cannot be set to a low levelthe lowest manual audio level settings is -36. This is still too much, and results in clipped audio, when using 'hot' microphones and loud sound sources (such as live concerts)Make audio levels adjustable to (up to) -100.

Give actual Gain (+), not Pad (-) instead. If Gain is fixed, use Trim instead. Proper indication as well (FS)
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continuous focus Issue in cine modeStill follow focus ion cine mode is big pain and needs to be improved...as for independent and bloggers its impossible to shoot with manual focus
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Audio specific @ClickCrabby
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Audio has randomly 1 or 2 frames extra
Audio file when recorded in Cinema DNG Raw then audio per clip records 1 or 2 extra frames and that too randomly on some clips - The duration of Audio to video is more by 1 or 2 frames need the duration of audio to video exact same so there is no syncing issue
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Audio has 2-12 framesCannot use cDNG mode. Importing clips in davinci means every clip has to be realigned
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No timecode on audio fileThere is no audio timecode and every clip of audio starts from 00.00.00.00 - already issue with audio being one frame extra and no timecode to match one has to sync it manually even for just transcoding for NLE adaptation.definately need the same video timecode to be linked with the audio. so when confirming the audio to pilot track one can sync the audio recorded on external recorder or devices.
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No Audio MetadataThere is no Metadata for Audio to Video marriage of the file or vice versa, and for which reason there is no link of video to audio when recorded in Cinema DNG and has to be exported on timeline as seperate file. (no link)metadata so that video recognises it has audio and Audio recognises it has video with it. so when video is dragged to timeline it can have audio file along with it and synced.
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still photo specific
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SummaryDescriptionSuggested fix
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0.1s shutter delayThere is a 0.1s shutter delay. The recorded still image differs from (i.e. is 0.1s more recent than) the temporarily frozen image shown on the camera display after pressing the shutter.
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exposure compensation not easily available in M modein M mode, +/- exposure compensation is not available on a dial or button, which is unpractical when shooting with Auto ISOmake exposure compensation available on the QS menu (as a configuration option) and allow Tone & Color buttons to be optionally used as +/- exposure buttons
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no DOF preview. lens always preview and focus at wide open.Lens always focus at wide open, until shutter is pressed. bad design for large aperture lens, as many wide aperture lens has focus shift issue. allow lens to close down aperture during preview.
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Magnifier location select with touchWhat's the point to focus dead centre and lose focus by recomposition
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2 - Feature requests
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Operation
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Support USB Audio DACFor headphone/DAC dongle
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allow af-on button when in manual focus mode
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allow 2 second timer for movies. To disable shake at the beginning of the shot when on tripod
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allow manual focus override when in autofocus mode
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allow change of focus direction
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linear mode for focussing
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Ability to assign functions to left and right side of function wheel.
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Allow the record button to be used for custom functions
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Ability to set function wheels to functions other than iris and shutter - when using non L mount/adapted EF glass one of the wheels will just be doing nothing
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Display
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RAW clipping indicatorsAllow us to see when each R,G and B channel clips in the RAW sensor sideThis will let us check RAW range quickly
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Proper RAW histogram option, like RED cameras have
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magnify during movie recording
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magnify time after touching lens 0.5 seconds
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zebra and focus peaking at the same time
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Ability to vertically flip the screen image, for use with a mirror to shoot twin-lens reflex camera-style.
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False Color
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Color
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LUT support / bake LUT in-camera
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Recording formats
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12bit linear RAW at 25pBased on published data rate it should be possible to do 12 bit at 25p
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12bit as 10bit + curveLike the 8bit DNGs make the 10bit store the full range with a linearisation curve
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24fps not supportedIt has 23.98 and 25fps, but is oddly missing 24 fpsAdd it
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DCI aspect ratios not supportedAdd DCI aspect ratios to match cinema cameras -- 2048x1080 + 4096x2160Add it
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10 bit non linear raw internal
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10 bit non linear raw external
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12 bit raw at 25 frames per second
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lossless compressed raw
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10 bit MOV recording, HEVC
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