Lens Correction Profile Support in Steelsring adapters for FUJIFILM cameras
Since 3.03 firmware releases, Steelsring EF/GFX adapter officially supports distortion and TCA correction for selected EF lenses, and Steelsring will add LCP support to our other lens adapters for FUJIFILM cameras.
Steelsring profiles EF lens optical characterics, convert the distortion and chromatic aberration correction parameters to FUJIFILM model, then incorporats them into EF/GFX firmware releases, and provide to FUJIFILM camera body when being required. These correction parameters are used in following scenairos:
- In camera JPEG production
- Lens profile info in RAF file headers
- Movie shooting
Steelsring noticed there are some differences in using these correction data when adapter works in different modes. In adapter mode, the distortion correction are disabled or ignored in JPEG productions and RAF files by the camera, an wild guess is to avoid conflicts with those manually correction parameters under adapter setting item of camera body menus. The RAF output file will contain a fake or zero effect distortion correction info to make it totally useless in post processing( can be verified in Photoshop or RawTherapee), in-camera JPEG file was not calibrated either. In FUJIFILM lens mode, everything is normal, in-camera JPEG files are calibrated, and correct parameters are embedded in the RAF files. Even better, user finally can decide how to apply them when importing RAF files in adobe camera raw, just like importing RAF files shot with FUJIFILM GF lenses.
Steelsring EF/GFX adapter customers are suggested to carefully choose adapter’s work mode based on the requirement for Lens Correction Profiles. If a customer want it in both JPEG and RAF files, please let adapter works in FUJIFILM lens simulation mode.
For an EF lens not profiled by Steelsring yet, it doesn’t matter which working mode adapter is, only a fake or zero effect lens correction profile will be used for JPEG or being embedded for RAF files. For supported lenses, please check firmware release notes.
Followings are some demos from our real testing, please lower down volume level of speaker before watch videos.
RAW w/o LCP
JPEG with LCP
Pictures were shot with EF 17-40mm f/4 L @ 17mm , with 35mm clipping turned off, RAW + JPEG
Shows the difference of in-camera JPEG files with distortion and TCA corrections and JPEG output from RAF file with distortion and TCA disabled in Photoshop.
RAW w/o LCP
JPEG w/ LCP
Pictures were shot with EF 17-40mm f/4 L @ 40mm , with 35mm clipping turned off, RAW + JPEG
Shows the difference for in-camera JPEG files with distortion and TCA corrections and JPEG output from RAF file with distortion and TCA disabled in Photoshop.
This video shows the RAF file post-processing in Photoshop
Since lens profile exists in the RAF file, PS will allows customer adjust the amount of distortion correction and enable/disable TCA correction,
Demo picture was shot with EF 17-40 L @ 17 mm too, RAW + JPEG
Video shot with GFX 100s and EF 17-40mm f/4 L @ 17mm
In adapter mode, camera turns off in camera distortion correction, but keeps TCA correction.
This video shows the scene without distortion correction.
Please ignore any possilble influences caused by handheld panning of camera.
Shot with GFX 100s and EF 17-40mm f/4 L @ 17mm.
In FUJI lens mode, in camera distortion correction is always active when shooting.
This video shows the real effect of distortion correction
Please ignore any possilble influences caused by handheld panning of camera.