rf-design

rf-design

Lives in Germany Germany
Joined on May 30, 2011

rf-design's recent activity

  • Sharing spectral evaluation results is a good thing. The required hardware should be as easy and appropiate as possible. There no doubt about this intention. To compare different ways to achive ...
  • Right, the sphere serve to reduce incidence angle problem, or inaccuracies with the measuring setup. I am interested in incidence spectral sensitivity difference resulting from interpixel, optical ...
  • "2.5" integrating sphere and several distinct components" 1. Sphere opening diameter? 2. Distance to sensor? 3. Intermediate apture? I am locking here: https://github.com/Alexey-Danilchenko/Spectron ...
  • That could only mean that Sigma copied the hole protocol and message fields from the Canon-EF to use in there own SA-mount electrical interface. Or is there a protocol converter, small integrated ...
  • Given the avaibility of LEDs from UV to IR and not needing high power densities of arc lamps you can simplify the setup. If Alexey is measuring with lens and have to use a small apture to narrow ...
  • Understanding the design design decisions. I think you refers by parts to different positions and incidence angles on the sensor and not the different parts of your setup. "With the precise ...
  • The reason for question was to understand the underlying decision to use the monochromator+sphere approach. The question is why this approach are used instead of a some different others. All will ...
  • Could you explain why for final spectral response measurement of photographic sensors not a simple solution is prefered by using a concave diffraction grating . Regarding accuracy the spectral ...
  • Thanks for reporting, 1. Is there any EXIF info transfered to the X3F file? 2. Did you consider to edit the lens entry in the custom EXIF file to trigger the color cast correction in SPP for ...
  • My observation regarding size/price/versality SDQ-H: need FF lenses w/o using the full image circle, in addition the center resolution is sometimes less than newer APS-C lenses SDQ: only matching ...
  • Up to now I use only Sony/Nikon for night shots but have found some highlight issues in the Q from a picture posted at DPR which could be of common reason. Look at the "red triple". They got ...
  • Ted, on sensor PDAF require for comparable performance a lens focus motor which allow faster and more repetitive operation than for separate module PDAF. So HSM types are working better. I have ...
  • It is a matter of balance. It depend on the cost of the sensor within the cam and a possible lens set. For instance the sensor contribute with 40% in the center and 20% in the corner to the MTF50 ...
  • The MC11-SA/L is not anything bad. There was at the outcome of the SDQ the question why not present a new short-mount and deliver an adapter with the cam for free. But his would create confusion if ...
  • Ted, ISO-less is a system decision that the SNR advantage of a switchable gain, either in pixel, read-amplifier or in the AFE external to the sensor is worth the effort. So ISO-less is simply ...
  • Socionext (Fujitsu before) having only digital sensor inputs. So it must be a separate chip for ADCs up to now. The Milbeaut processor series have a record history of design wins: Pentax, Nikon, ...
  • Yes, that is a point for improvement. Actual the SDQ have less LV resolution than the EVF display. The noise could also be lowered if you read more pixel and integrate them over time. The same is ...
  • The APS-C and H do not need stitching. The stitching for FF is done in the fab but there could be nonuniformity effect which are visible as stitching line in the image. So I guess all FF sensors ...
  • With the MC11-SA/L mount adapter there is not much difference to a native SA-mount camera. If all older, not Contemporary, Art or Sport lenses are supported is a detailed question. I have mostly ...
  • Created discussion thread 3 years Foveon FF Sensor Development
    The fullframe sensor development startet 3 years ago and is still under development. That seems to me a quite long time for a Quattro scaling to a different dimension. I expect that for a 3 years ...
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Total messages 522
Threads started 44
Last post 6 days ago
Total comments 30
Total likes 20
Last post 4 weeks ago
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Photos uploaded 81
Last upload Mar 31, 2015