Duplicating a post I just made on DP Review responding to
@marc aurel about C1 and the new 30mm TS:
https://www.dpreview.com/forums/post/67255342
TL;DR version: profile recognized but corrections not enabled. Lens has a bit of distortion and light falloff, but I'm very impressed!
Warning: nerdy architecture photo stuff ahead...
I just updated C1 and checked out the DP Review sample files. Image DSCF0668 is particularly good for checking corrections since it's well leveled and has detail in the shifted corner.
https://www.dpreview.com/sample-gal...0-ii-pre-production-sample-gallery/2913371124
My standard workflow for finding shift amount in leveled architectural images is:
- Set grid to mm on the sensor (or .5mm if possible) for the GFX, this is 66x88 for a .5mm grid.
- Read the distance from center of the image (red cross in preview window) to the location of zero convergence of horizontal lines (camera level). If two dimensions of shift have been used, do this for both X and y directions.*
- Enter that offset in the Lens Correction - Movement field. (This offset affects distortion, light falloff, CA correction and sharpness falloff.)
As I went to enter the measured shift amount (about +15mm Y), I saw that it had already been populated by default! One change is that normally there are Shift X and Shift Y fields - that's changed to Shift and Direction. (There are also Tilt and Direction fields now too!) Anyway, cool - the lens profile and shift metadata are recognized by default.
Distortion correction and Light Falloff are set to zero by default. Attached is a series of screenshots that shows the progression of enabling those corrections (setting each to 100%). Blue marks show default settings, red for settings I've changed.
- No correction - as opened in C1
- Distortion correction only, set to 100%
- Distortion and light falloff correction set to 100%. I dropped exposure 1/3 stop to compensate for the now brighter image.
- Distortion and light falloff corrected, and canvas expanded to show the stretched corners.
*Note: in my own work, I always shoot a zeroed frame to calculate shift from. This way I don't have to take notes