Digitizing Film: Epson 4490 vs Pentax K-1 with Pixel Shift
Original slide taken December 26th, 2023 on Kodak Elite Chrome 100, exposed at 80, expired 2007, which due to loss in sensitivity was underexposed about a stop. The camera was a Canon EOS Elan 7E, lens a Tamron 85mm f/1.8 DI VC USD, at f/4 and 1/60 with vibration control turned on. Home developed in Arista E-6 kit. Both images are roughly 80% crops of the 35mm frame. Both have had curves edited to my taste, though saturation was not changed.
The left image is an Epson 4490 scan at 2400 dpi, in 16-bits per channel with scanner autoexposure turned off. This is the practical upper limit of Epson flatbeds, higher dpi settings do not resolve more detail. I have read this is due to the quality of the scanner lens.
The right image is taken with a Pentax K-1 DSLR with Pixel Shift for 1.3 seconds at a 12 second timer with mirror lock up, with the SMC Pentax-D FA 50mm F2.8 Macro lens at f/8 and perhaps 1:1.3 magnification, on a DIY SmallRig copystand, using a white image on an iPhone 11 as the backlight, and a plastic snapping slide mount as a carrier, resting on top of a spare lens hood to provide distance between the light and film. This is an early alpha version of the rig I will set up when all parts arrive. The camera was secondhand and came with a battery that only holds a 5 minute charge, which has limited my testing so far. But even under these imperfect conditions it's showing resolution approaching a true 4800 dpi scan. Raw file was converted to TIF using RawTherapee and curves/rotation edits were made in GIMP. This image had a 0.5 degree rotation applied which resulted in a slight loss of detail.
Thanks to Wolfgang Kraus for doing the testing of the Pentax K-1 for film digitization work and publishing it for others to see. You can view his setup here: www.flickr.com/photos/6345-789/49572625458
Thanks also to forum user Shijan, you can view his DIY copy stand solution here: i.imgur.com/oyqjJWt.jpg
Digitizing Film: Epson 4490 vs Pentax K-1 with Pixel Shift
Original slide taken December 26th, 2023 on Kodak Elite Chrome 100, exposed at 80, expired 2007, which due to loss in sensitivity was underexposed about a stop. The camera was a Canon EOS Elan 7E, lens a Tamron 85mm f/1.8 DI VC USD, at f/4 and 1/60 with vibration control turned on. Home developed in Arista E-6 kit. Both images are roughly 80% crops of the 35mm frame. Both have had curves edited to my taste, though saturation was not changed.
The left image is an Epson 4490 scan at 2400 dpi, in 16-bits per channel with scanner autoexposure turned off. This is the practical upper limit of Epson flatbeds, higher dpi settings do not resolve more detail. I have read this is due to the quality of the scanner lens.
The right image is taken with a Pentax K-1 DSLR with Pixel Shift for 1.3 seconds at a 12 second timer with mirror lock up, with the SMC Pentax-D FA 50mm F2.8 Macro lens at f/8 and perhaps 1:1.3 magnification, on a DIY SmallRig copystand, using a white image on an iPhone 11 as the backlight, and a plastic snapping slide mount as a carrier, resting on top of a spare lens hood to provide distance between the light and film. This is an early alpha version of the rig I will set up when all parts arrive. The camera was secondhand and came with a battery that only holds a 5 minute charge, which has limited my testing so far. But even under these imperfect conditions it's showing resolution approaching a true 4800 dpi scan. Raw file was converted to TIF using RawTherapee and curves/rotation edits were made in GIMP. This image had a 0.5 degree rotation applied which resulted in a slight loss of detail.
Thanks to Wolfgang Kraus for doing the testing of the Pentax K-1 for film digitization work and publishing it for others to see. You can view his setup here: www.flickr.com/photos/6345-789/49572625458
Thanks also to forum user Shijan, you can view his DIY copy stand solution here: i.imgur.com/oyqjJWt.jpg