rf-design

There is a simple basic limitation on the factor of improvement!

The deconvolution is perfect if

1. The deconvolution matrix is defined for an unlimited number of monochromatic lights...

My reason to make an entry to the NEX system was a good deal. A NEX3N with the Sigma 2.8/19mm for 260€. I had experience with 1'' sensors from the Fuijifilm S100FS and a good choice would be the...

The results from my old Sigma 3.5-5.6/18-50mm are better than from the Sigma 2.8-4/18-50mm OS HSM both in Sigma-Mount SA compared at 4.0 and 5.6 at 18mm and 50mm shoot with the Sigma SD15 and...

I have two of them. One for Sony the other for Sigma. Both show this jump-effect and it is getting worse. Now the Sigma-SA version show this jump effect if I zoom in or out and you can hear some...

160MP Oversampling-Bayer w. DigitalZoom & Correction where is the place for a Foveon? Last year Nokia presented the Lumina phone and I think the hole sensor/optic concept is a very interessting...

As I remember from the white paper the hole trick is that the lens design allows more "optical" resolution in the center of the image. You can see it in the images for the wide angle setting. The...

I have the same lens for SA-mount. I got the same knocking noise after about 1 year use. The optical stabilizer tries to counteract small movements of the lens but will be nonacting or shift back...

I did asking a similar question 3 month ago: http://www.dpreview.com/forums/thread/3189966 My motivation is to reduce the time to capture a night scene with a required DOF and signal to noise...

After the first minutes of surprise I came down to a list of issues which could state that the final manufacturable solution would give much less gain than expected.First the picture from...

The kodak bayer curves give me the impression that bayer filters are inverted cathode ray tube phospor sensors :-)The readings of color vision seems to indicate that a solution to represent color...

I share your thought on memorizing what should be the right color in PP.For the technical side you need to complete the nice pictures above. You have to include the spectral curves for the screen...

So we discuss here detectors in the sense of color differentiation. My understanding is to include filtering properties of silicon. Antireflecting coating. Bayer filters. Photon detection and so...

My meaning of "sensitivity curves" is the "photon detection over spectral energy". So how responsive the sensor channel is over the wavelenght of a monochromatic light sources.I guess that sRGB is...

Yes, color accuracy defined as difference to a standard color representation like sRGB will depend on the light source spectral definition. So for instance you can get a color card corrected for...

The sony patent show the strongly overlapping spectral sensitivity curves. That is the same for foveon. Because the sRGB standard have spectral sensitivity curves with much less overlapping you...

Just got this patent application which give also useful information about the technical details of the issues valid for all 3-layer sensors.http://www.freepatentsonline.com/20130009263.pdfAs I...

Hi Guido,to understand sensor technologies, the physical and the electronic side, was driven by personal interest. Today I understand that from the engineering standpoint Foveon are more difficult...

This kind of effect is the result off cross leakage between adjacent pixels and Foveon layers!For ideal ilumination of the Foveon sensor, light incidence angle equals zero, there is a specific...

As history has shown there is no technical reason to give system users less choice.Take a look at the lastFujifilm Finepix S5 Pro; it is a sensor plus electronic in a Nikon D200 bodyor the...

Yes, each of the 4 different DSLR which I use regulary have unique features. Buffer and AF is simply better with the SD15 but the colors of the SD14 are in specific situations matched to the wanted...