250MP CMOS Sensor

Discussion in 'The Watering Hole' started by sesser, Sep 9, 2015.

  1. sesser

    sesser Zen Master

    490
    Mar 10, 2015
    Portland, OR
    randy
    Anyone else see this?

    http://www.canon.com/news/2015/sep07e.html

    When installed in a camera, the newly developed sensor was able to capture images enabling the distinguishing of lettering on the side of an airplane flying at a distance of approximately 18 km from the shooting location.
    18 km is a little over 11 miles for us main-landers.
     
  2. Machi

    Machi Mu-43 Veteran

    208
    May 23, 2015
    It's nice progress but it's also pretty much useless information when we don't know through which optics it was taken.
    Everyone can do the same with 16Mpix MFT sensor with ~500mm+ optics under good conditions.
    Resolution of sensor is pointless if it isn't coupled with proper lens.
     
  3. Carbonman

    Carbonman Mu-43 All-Pro

    Jul 10, 2014
    Vancouver BC
    Graham
    They must need hellacious cooling for the sensor and electronics - talk about overclocking!
     
  4. sesser

    sesser Zen Master

    490
    Mar 10, 2015
    Portland, OR
    randy
    Right. Got some samples? ;)

    18km = ~ 11mi = ~58k ft. Average commercial airline flies at ~35k ft.

    EM170038.JPG
    This was taken with a 50-200 SWD + 1.4x TC at 283mm. Pretty close to directly overhead. It's not the clearest of shots (283mm at 1/400s hand held). Assuming 35k ft (and adding another 5k for arguments sake), what do you suppose a 500mm lens would net? Add another 18k ft. on the distance. You *might* be able to get close enough to tell what kind of plane it is, but I highly doubt you'd be able to read the lettering on the side plane. Not with a 16MP 4/3rds sensor anyway. Even in optimal conditions.

    That said, the article did mention the use of optical and digital magnification. Nonetheless, the sheer number of pixels crammed into an APS-H (29.2 x 20.2 mm) sized sensor is still pretty amazing.
     
  5. Geoff3DMN

    Geoff3DMN Mu-43 Veteran

    I'm sort of thinking that the sensor would out resolve most existing Canon lenses :)
     
  6. Machi

    Machi Mu-43 Veteran

    208
    May 23, 2015
    This new sensor has 4.2× better vertical and horizontal resolution than 16 MPix M4/3. It means that one needs 4.2× longer focal length for the same reach.
    But it also means that new sensor has extraordinarily high demands on quality of optics and every image from this sensor with lens slower than f/2.8 is diffraction limited.

    Here are few real life examples from the combination of 16MPix M4/3 sensor with cheap optics. Nothing comparable in sharpness and contrast with the Canon's L-class lenses.

    Korean Air Lines Boeing 777-2B5(ER) number HL7752 through Expert 400/5.6 at ~9 km distance.
    Image is resized to the half size, so it's now equivalent to 18 km. Numbers are visible.

    HL7752half.

    VP-CMY - Private Gulfstream Aerospace G-IV-X Gulfstream G450 through SkyWatcher 8" (1200/6) at ~14 km distance.
    Again, image is resized to 50%.
    It's much smaller aircraft and image was significantly degraded by the motion blur.
    Still it shows that numbers would be visible with smaller lenses (500-600mm) even on this small aircraft at distance 14 kilometers.

    VP-CMY.

    I agree, it is pretty amazing.
     
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