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Ob man glaubt, dass man die Website ansatzweise ernst nehmen darf, darüber ist man sich ja nicht einig, aber sie haben immerhin mal K-1 Daten publiziert (im Gegensatz zu den markführenden Ergebnissen der 645Z, die sie seit 2 Jahren unterschlagen):
Of course, as sensitivity increases, image quality deteriorates, so how does the Pentax K-1 fare at higher ISO settings? Dynamic range descends in a very linear fashion from its high of 14.6 EV at ISO 100, and continues to offer good dynamic range around 10 EV as high as ISO 3200. Dynamic range remains at a respectable 7.92 EV up to ISO 12,800; and though dropping to a low of 3.92 EV at the top standard ISO output setting of 204,800 ISO, many photographers rarely use such high sensitivities. Color depth is good (above 20 bits) up to ISO 1600 and respectable up to ISO 6400. Combined with the K-1’s excellent SNR 18% result of 30dB at ISO 3200, the K-1 produces very good all-round RAW file image quality up to ISO 3200.
The Nikon D810’s achieves its fractionally-higher headline dynamic range (Landscape) score of 14.8 EV at its base ISO of 64. The K-1 achieves a very close 14.6 EV at ISO 100, however, and between ISO 100 to ISO 800, offers greater dynamic range than both the Nikon D810 and Sony A7R. All three 36Mp sensors offer good dynamic range of over 10 EV up to ISO 3200.
Signal-to-Noise Ratio (SNR 18%) analysis shows that for printed results, the K-1, D810, and A7R broadly offer the same levels of noise at all sensitivities. Excellent SNRs are achieved up to ISO 400, with well-controlled noise on RAW files at ISO 1600, too. At the higher sensitivities, noise becomes more prevalent, with the Sony A7R performing slightly better at ISO 25,600 and the Pentax K-1 showing its lowest SNR of 7.1dB at ISO 204,800.
Scores against the similarly-priced but lower-resolution Nikon D750 and Canon 6D sensors put the Pentax K-1 on top, with the highest scores in all categories. Against the 24Mp Nikon D750, the K-1 offers around a half-stop better color depth, with scores of 25.4 bits vs. 24.8 bits; and fractionally-improved dynamic range, with scores of 14.6 EV vs 14.5 EV. The K-1 fares much better against the Canon 6D in these categories, offering at base ISO a 1-bit color advantage at 24.8 bits, and a significant 2.5-stop improvement in dynamic range, scoring 14.5 EV compared to just 12.1 EV for the 6D. That doesn’t tell the whole story, however, because while dynamic range on the K-1 and D750 reduces in a linear downward fashion as ISO sensitivity increases, the 6D maintains its score of around 12 EV up to ISO 800. So between ISO 100 and ISO 400, the Pentax and Nikon models offer an advantage, but from ISO 1600 onward, the scores are much more comparable.
https://www.dxomark.com/Reviews/Pentax-K-1-sensor-review-Full-frame-marvelConclusion: Successful first full-frame DSLR
Boasting a robust, weather-sealed construction with some interesting features, including built-in stabilization, pixel shift image merging, and Pentax’s AA filter simulator, the Pentax K-1 offers a lot at a competitive price point. What’s more, image quality is among the best we’ve tested for full-frame interchangeable lens cameras.
If you’re looking for a high-resolution 36mp DSLR for large prints, or top-quality advertising, editorial, or wedding work, the K-1 offers slightly better dynamic range and comparable results for color and noise compared to its 36Mp rivals. Its sensor scores are a cut above similarly-priced full-frame offerings from Nikon and Canon, too. The K-1 boasts better results for dynamic range at lower ISO sensitivities compared to the Canon 6D, and very similar scores to the Nikon D750 in these categories as well. It’s also ahead for color sensitivity at lower ISOs, and despite greater resolution than both the 6D and D750, it maintains similar signal-to-noise ratios. So the K-1 is a successful first full-frame DSLR from Pentax, giving photographers looking for great image quality another camera to consider. If you’re not already heavily invested in a particular brand’s lenses and accessories, put the 36Mp Pentax K-1 on your short list.