1. Jonathan Lee8's Avatar
    Hi - I posted my thoughts on the 640 on another post on this forum. I was hoping that I would have better luck with the camera, but thus far, I'm disappointed. Today, I took some pictures simultaneously with an old Galaxy S3 and with the 640, and I must say that I was consistently more pleased with the Galaxy's photos. I post examples below. Is there a way that I can learn to use the 640's camera to get better shots? If not, I don't think that this phone is going to suffice as my daily driver (even if it was just $30!).

    S3 photo:
    20160326_123019.jpg

    640 photo:
    wp_20160326_12_30_10_pro.jpg
    03-26-2016 05:47 PM
  2. gpobernardo's Avatar
    May I ask why you are more pleased with the photos from the Galaxy S3?

    In general, the key condition to make the camera perform at its best is sufficient light. This will force the camera to use lower ISO (less noise due to signal amplification) and faster shutter speeds (less blur). If you're referring to the white balance, then aside from adjusting the white balance manually and image post processing there is nothing much else to do. If you're referring to image sharpness (given a fully-illuminated subject at ISO100 and 1/16000s shutter speed), then nothing can be done about that since that's already a hardware- (lens-) limited trait.
    RumoredNow likes this.
    03-29-2016 07:01 AM
  3. Saijin_Naib's Avatar
    Look closer. The L640 has way better dynamic range than your S3 does. Highlights and shadows aren't clipped. Yeah, it butchered the White Balance but that happens from time to time.

    The L640 also isn't aggressively over-sharpening the image to give the impression of better detail like the S3 is.
    RumoredNow likes this.
    03-29-2016 11:47 AM
  4. RumoredNow's Avatar
    I'm not sure what happened. Doing the math, the S3 image is 8MP, but the 640 image is only 2.1MP. Please check for yourself: Camera Resolution/MP Calculator

    Is it the way you uploaded the pics? Did you share the 640 pic to yourself in email or some other way that may have auto-reduced size?

    capture01.png


    What camera App did you use to capture the image with Lumia 640? Is it possible you have it set to use a reduced capture size?

    The size disparity makes it hard to give a good side by side comparison. It made me wonder when I looked at the images full size in my browser as to why the 640 image appeared so much smaller at 100%.



    Let's take a look at what the cameras did with what they have.

    capture02.png


    The Lumia 640 has an aperture (F-stop) of f/2.2 which allows it to gather light better than the Galaxy S3 at f/2.6. This is reflected in the Lumia using a higher ISO and faster shutter. Flash was off on both so it did not factor. The Galaxy S3 used a shutter speed of only 1/30 of a second (twice as slow as Lumia) and that is probably the major factor for lack of focus. In general, the higher F-stop # on the S3 should give it a greater depth of field (more focus as you move nearer or farther than the subject), but it was defeated by that slow shutter which translates "wobble" without any stabilization. I prefer the cleaner depth of field that Lumia 640 captured.


    I ran into another anomaly:

    advanced.png


    The Lumia identified the light source as Tungsten. That means old style incandescent bulbs. They definitely have a yellow cast to the light.

    But apparently you adjusted the White Balance on both cameras. I have no idea what you did for an individual setting or even if you set them both in the same direction.

    The Galaxy S3 interpreted the shot in a much colder temperature. The colors are decidedly slanted towards the blue end of the spectrum. It is most noticeable on the ceiling structure and the gi uniforms of the participants. Maybe you were adjusting White Balance to achieve an effect? Not sure what that was until you report back.


    Is it possible to get two fully auto samples from similar conditions and both at full size? Makes it hard to judge otherwise.
    03-29-2016 11:59 AM

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