Posts in Category: Uncategorized
Pixel Shift 16-shots versus Stitching
Revealing real-world image examples about the nature of resolution you won’t find anywhere else. Pixel shift certainly works, but there’s more to it.
One is a single shot, one is pixel shifted 16-shots, can you guess which is which? It’s not quite what you might expect…
Introduction: setting the scene
Important details about the sample images
Setup Notes
Test with Lens #1 GF35-70mm
Test with Lens #2 Mejiro Genossen FL0530
Test with Lens #3 GF110mm F2
Conclusion and thoughts
Introduction: setting the scene
On 11 Feb 2020, Jim Kasson published a very controversial post: pixel shift does not increase resolution. Quite immediately, it raised the ire of a number of photographers who insisted that they could plainly see far more detail in pixel shifted 16-shot images. Separately, Frans van den Bergh, one of the most respected in the field of MTF and image quality analysis, backs up Jim’s claim in a reply relating to MTF mapper (15 Jan 2021). I quote him, emphasis mine:
Taming Obdurate Orchids
A glimpse into overcoming some of the challenges of making pictures of orchids, the Fujifilm GFX 100S and a bonus bit about sensor crookedness
Dendrobium Airey Peach, 2023. Photograph notes: Sony a7R II with SMC Pentax-A 645 120mm F/4 Macro, natural daylight illumination, F11, 51 focus-bracketed exposures, raws processed in RawTherapee using custom made camera profile, blended in Helicon Focus.
Your Cameras and Lenses are Crooked and How to Adjust Them
Plus a bunch of tidbits about some of the challenges in making astro-landscape photographs
Silver River Shimmers, 2017
Photograph notes: This is a composite of 4 vertical frames stitched for the sky and another 4 vertical frames stitched for the land for a total of 93.8 million pixels, using a Sony a7R II at ISO 800 and Canon EF 35mm f/1.4L II USM. Each of the sky frames was stacked and averaged from nine 32-second exposures at f/2.8. The land frames were stacked and averaged from four 32-second exposures at f/4 made 23 mins later at predawn to avoid shadows from the sun. 52 exposures were used in all. The sky exposures were tracked with a Sky-Watcher Star Adventurer.