k-hawinkler
Well-known member
When attaching Leica M lenses, designed for a 36x24mm sensor, to the Fuji GFX 50S camera with a 44x33mm (43.8x32.9mm to be precise) sensor, I would like to know the size of image circles M lenses cover. So let's get started with a vignetting study of the Leica Summilux-M 50/1.4 ASPH. The following is an image of the 50/1.4 lens adapted to my GFX 50S.
Sony ILCE-7RM2 + FE 90mm F2.8 Macro G OSS @ ISO 100, FOCAL LENGTH 90.0 mm (90.0 mm in 35mm), APERTURE f/13, EXPOSURE TIME 0.01111s (1/90).
In examining vignetting, we take into account the various image sizes that can be selected in the 50S, now updated to firmware version 3.30.
GFX 50S: 35mm FORMAT NODE: OFF
Ratio = 4/3 • Image Size: 8,256*6,192 = 51,121,152 1.00
Ratio = 5/4 • Image Size: 7,744*6,192 = 47,950,848 0.94
Ratio = 3/2 • Image Size: 8,256*5,504 = 45,441,024 0.89
Ratio = 7/6 • Image Size: 7,232*6,192 = 44,780,544 0.88
Ratio = 1/1 • Image Size: 6,192*6,192 = 38,340,864 0.75
Ratio = 16/9 • Image Size: 8,256*4,640 = 38,307,840 0.75
Ratio = 65/24 • Image Size: 8,256*3,048 = 25,164,288 0.49
GFX 50S: 35mm FORMAT NODE: ON
Ratio = 3/2 • Image Size: 6,768*4,512 = 30,537,216 0.60
The last column shows the relative MP size for the different image formats. The 35mm format image with 36x24mm has 60% as many pixels as the 4/3 full image. That's more than the 65/24 image that uses 49%.
Next we show 8 vignetting images for Minimum Focus Distance (MFD) for f/1.4, 2, 2.8, 4, 5.6, 8, 11, 16 for the full 4x3 image.
MFD f/1.4
MFD f/2
MFD f/2.8
MFD f/4
MFD f/5.6
MFD f/8
MFD f/11
MFD f/16
In the next post we show the corresponding vignetting images for INFINITY (INF) focusing.
Sony ILCE-7RM2 + FE 90mm F2.8 Macro G OSS @ ISO 100, FOCAL LENGTH 90.0 mm (90.0 mm in 35mm), APERTURE f/13, EXPOSURE TIME 0.01111s (1/90).
In examining vignetting, we take into account the various image sizes that can be selected in the 50S, now updated to firmware version 3.30.
GFX 50S: 35mm FORMAT NODE: OFF
Ratio = 4/3 • Image Size: 8,256*6,192 = 51,121,152 1.00
Ratio = 5/4 • Image Size: 7,744*6,192 = 47,950,848 0.94
Ratio = 3/2 • Image Size: 8,256*5,504 = 45,441,024 0.89
Ratio = 7/6 • Image Size: 7,232*6,192 = 44,780,544 0.88
Ratio = 1/1 • Image Size: 6,192*6,192 = 38,340,864 0.75
Ratio = 16/9 • Image Size: 8,256*4,640 = 38,307,840 0.75
Ratio = 65/24 • Image Size: 8,256*3,048 = 25,164,288 0.49
GFX 50S: 35mm FORMAT NODE: ON
Ratio = 3/2 • Image Size: 6,768*4,512 = 30,537,216 0.60
The last column shows the relative MP size for the different image formats. The 35mm format image with 36x24mm has 60% as many pixels as the 4/3 full image. That's more than the 65/24 image that uses 49%.
Next we show 8 vignetting images for Minimum Focus Distance (MFD) for f/1.4, 2, 2.8, 4, 5.6, 8, 11, 16 for the full 4x3 image.
MFD f/1.4
MFD f/2
MFD f/2.8
MFD f/4
MFD f/5.6
MFD f/8
MFD f/11
MFD f/16
In the next post we show the corresponding vignetting images for INFINITY (INF) focusing.