It'd have to be pretty eathshattering IQ-wise if that is the case.
Even if it is only a slight improvement at base ISO it will remain the camera delivering the second best absolute image quality short of a D800/a7r or digital backs. You can put 1 M$ on a lens for your 5DIII and will still not get that level of image quality...So what we have is an incredibly under priced DPx Merrill. It seems only natural for Sigma to charge an amount more un line with the value delivered.Cheers,Bernard
Even if it is only a slight improvement at base ISO it will remain the camera delivering the second best absolute image quality short of a D800/a7r or digital backs. You can put 1 M$ on a lens for your 5DIII and will still not get that level of image quality...
Though with a 5d3 I could track moving subjects, shoot in near dark, shoot at 6fps etc etc. The difference in IQ wont be noticeable to most or in anything but very large prints.
The difference in IQ wont be noticeable to most or in anything but very large prints.
So the worst thing that can happen is DPXM selling at $400. That's fine with me. Funny though how you get middle format + digital back quality for the price of a bad dslr....
"Resolution is 30 percent higher" according to the "technology" tab on the Sigma-global website, so less really is more if this claim can be made good in practice.
2.2 Spectral characteristicsEven with the large changes in absorption depth with wavelength, the response curves of devices using thesemiconductor material overlap considerably (Figure 2) 3. The steep slope in the silicon curve in the 400-475 nm rangeprovides substantial separation of the blue signal from the red and green below, but the relatively shallow slope above475 nm results in a significant contribution of longer wavelength illumination to the top two signals. Fortunately, therelatively thin absorption regions of the top two diodes minimize this. In addition, some of the short-wavelengthphotons will make their way into the middle diode. It is this overlap that makes possible the discrimination ofwavelength below 450 nm that is so difficult using color filters.The extended response at both ends of the visiblespectrum also makes incorporation of a sharp-cut visible filter essential. The curves in figure 6 include the effects of afilter with cutoffs at 400 and 660 nm.
"1-4-1" arrays of VCF sensor groups have an advantage in that their green channel response is not very far from a theoretically ideal luminance spectral sensitivity curve, and thus they can adequately capture high frequency luminance information while also realizing their implementation advantages relative to 4-4-4 arrays having red, green, and blue sensors of the same size as the green sensors of the 1-4-1 arrays. However, the full-resolution readout of green in such 1-4-1 arrays undesirably requires four separate contacts to the green layer (per each contact to the red layer). Each contact to the red or green layer undesirably occupies much space in the array.
U.S. patent application Ser. No. 10/738,484 discloses an array of VCF sensor groups in which each group includes a blue sensor, a green sensor, and a red sensor. Each of the red sensor and green sensor of each group is larger than the group's blue sensor and is shared with at least one other VCF sensor group. The blue sensors are typically implemented near the top surface of a semiconductor wafer and the red sensors deeper in the wafer. The size of each red sensor is roughly four times the size of each blue sensor, and sets of four adjacent VCF sensor groups share a single red sensor. Each green sensor's size can be about half the size of each red sensor (or can be the same as each blue sensor's size or can be any of a variety of other sizes). An implementation of such an array in which the each red sensor's size is four times the size of each blue sensor, the size of each green sensor is about half the size of each red sensor, the top layer is the blue layer, and the bottom layer is the red layer is a "1-2-4" array (or an array having "1-2-4" organization) in the sense that the resolution of its green layer is higher by a factor of two than that of its red layer and the resolution of its blue layer is higher by a factor of four than that of the red layer.
In some such embodiments, the array consists essentially of solid material including a semiconductor substrate, each low layer of sensors is implemented between the substrate and the top surface, and a contact (e.g., plug or trench contact) extends from each sensor in each low layer to the readout circuitry. For example, a "1-1-4" implementation of such an array having two low layers (a bottom layer and an intermediate layer between the top and bottom layers) can include 4Y blue sensors in the top layer, Y green sensors in the intermediate layer, and Y red sensors in the bottom layer, and a total of 2Y vertical contacts between the red and green sensors and the readout circuitry. ...For example, when S=4, each cell can include six sensor selection switches: one coupled to a shared sensor in a first low layer; another coupled to a shared sensor in a second low layer below the first low layer; and each of the other four coupled to different non-shared, top layer sensor. In this example, the sensor selection switches are controlled during readout to accomplish sequential readout of the four non-shared sensors and two shared sensors of each set by circuitry coupled to the sense node. Such use of sensor selection switches for each cell can allow the array to be implemented with much simpler surface layer geometry than can a conventional VCF sensor group array having the same number of VCF sensor groups. The relatively low resolution at which each low layer of the inventive array is read out allows the array to be implemented on a semiconductor substrate with fewer contacts (e.g., plug or trench contacts) to the low layer(s) than if each low layer were configured to be read out with full resolution, and can result in a better signal-to-noise ratio than can be achieved by conventional arrays. Because each plug, trench, or other contact to a low layer undesirably occupies space in the array and typically increases the array's cost and complexity, it is desirable to minimize the number of such contacts.
In preferred implementations in this class in which each top sensor is a blue sensor, full resolution readout of the blue (top) layer and lower resolution readout of green and red layers can generate luminance information having the same spatial frequency for incident blue light and incident green light, although the blue channel's spectral response is less ideal (farther from a theoretically ideal luminance spectral sensitivity curve) than is the green channel's spectral response, because the full resolution blue layer of each such implementation responds to green and red light as well as blue light. These implementations of the invention can adequately capture high resolution luminance information, while their full resolution readout of the top (blue) layer and lower resolution readout of the other (green and red) layers also provides advantages (e.g., compactness, noise improvement, and reduction in the number of contacts that must be provided to sensors in the green and red layers) that cannot be realized by full resolution readout of the intermediate (green) layer of a "1-4-1" array and lower resolution readout of the blue and red layers of the "1-4-1" array.
What makes these cameras particularly significant is they use an exciting new sensor not manufactured or designed by Sony.Sony are everywhere. They are even making 50mp CMOS sensors for use in new backs from Hasselblad and Phase One. That's great but it's good to have a different option. More strength to Sigma.
How was the af in the previous models?
