CW_7 Save the pixels lab

CW_6 - camera and SD card

1. your camera (manufacturer & model)

answer: Nikon D750

2. the sensor size (in mm: ? x ?), maximum megapixel rating, sensor type (eg “APS-H”)

answer: sensor size : 35mm (35.9mm x 24.0mm) ; max megapixel rating : 24.3 ; sensor type : CMOS

3. lenses you own & can use on your video recording-capable camera 

    — in 35mm equivalent focal length range, associated widest apertures

answer: I only have one useable lens which is a DX lens (yes, I have a crop on a full frame...I'm ashamed too) - 17 - 55mm 2.8G - 22G

4. biggest memory card you own in terms of capacity (in GB), class (eg “class 10”), 

   and card speed (eg. x 133). 

   If it’s an SD type card, which class is it?  (e.g.. class 10)

32GB class 1000x Lexar professional

   Read the following article from B&H PhotoVideo which indicates all relevant aspects of cards:
   Memory Cards Explained

   Which class of card do you need for shooting video? What does your SD card classification 

   mean in terms of writing speed: is it fast enough to be shooting video?

answers: You need a class 10 to shoot HD quality video.That means my SD card is good enough to shoot HD video.

5. How many minutes of video capacity does your biggest memory card have shooting at both the 

     highest & lowest resolution capture settings?

Highest :  1920 x 1080

Lowest : I couldn't find out

     Also, does your camera have a limit on the amount of video shooting time? 

Yes, 10min

     What is the technical reason for limiting single shot video shooting time?

DSLRs are not optimized for video capture

     State your answers as memory card size / recording quality (resolution & mode) & maximum minutes

     ( eg. 8GB memory card / 1280 x 720p [SD mode] yields 20 min. of video)

     (NB. you will probably have to test this out by turning on your camera with your empty reformatted

     memory card installed, the display set to indicate total frames remaining/total video time available,

     video quality set to highest and then lowest resolutions)

answers:

- highest resolution no. of minutes: I couldn't find out

- lowest resolution no. of minutes: I cound't find out

6. maximum file size per clip        

answer:

-24MP

8. format of movie files created (eg. QuickTime Motion JPEG, AVCHD, MPEG4, etc.)

    (... there’ll probably be more than one, depending on camera and resolution sizes & modes) 

answers:
-H.264, MOV
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9. which video output resolutions does your camera produce? 

     try to include all of the following info for each level of video resolution your camera produces:

- (sample answer might be:     720p / 1280 x 720 pixels/ SD / 4:3 / 30fps)

               answers:

-  1920x1080 ;60p

- 1920x1080 ; 50p

- 1920x1080 ; 30p

- 1920x1080 ; 25p

- 1920x1080 ; 24p

- 1280x720 ; 60p

- 1280x720 ; 50p

10. looking at the above resolution dimensions available, are they using the same aspect ratio or not? 
      (eg. 800 x 600 is a 4:3 aspect ratio while 1920 x 1080 is a 16:9 aspect ratio). 
      What are the differing aspect ratios for each of your camera's video format resolutions?

answers: Yes they have the same aspect ratio
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11. shutter speed range your camera can record video in: does your camera permit you to set shutter 

      speed when recording video? (Can you in fact set manual setting for video shooting?) Whether it 

      does or not, what shutter speeds can you set on your camera for shooting video?

answers:Yes I my recording video mode can be in manual. shutter speed : from 1/4000 to 1/60

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12. aperture: does your camera permit you to set the aperture when recording video?

             answers: Yes

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13. shutter speed & aperture restrictions — answer this only if your camera does not permit you to 

       choose manual video shooting settings. 

       If your camera doesn’t have manual setting capabilities, what other camera setting can you use to 

       control exposure then?

  answers:

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14. focus: how does your camera focus when shooting video? Does it permit you to manually focus

       or are you left with autofocus only?

eg. — The most important thing to know about the Nikon D5000’s video controls is the fact that the camera cannot 

autofocus while video is being recorded. You can autofocus the image before recording begins (by pressing the shutter 
button halfway down, just like you do with still images), but once you start recording you must manually focus 
everything..When you try to autofocus while recording, the camera lens moves and changes exposure just as if 
you’re autofocusing a still image.
answers: autuomatic and manual focus in video mode
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15. your camera records video at what data rate (expressed in MB/sec. or mbps)

answer:150 mb/s
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16. specific and particular settings recommended for your camera model — the best way to 

      do this is to look at the camera reviews for your model on preview.com and/or imaging resource.com

      and read their review section on the video functioning (often listed as “video” or “movie” review section). 
      You can also research this in a Google search —eg. at least one very popular camera (hint: 5D) has

      suggested settings for ISO to obtain the least noise in video mode.

answers:On the front left of the camera, you will find a lever that goes from AF to M, with a button in the middle (big red circle in the image below). Make sure to keep that lever on “AF”, or your lens will not autofocus. If for some reason your lens stops focusing, this is what need to check first. Pressing the button in the middle of the lever allows to choose between different focus modes.

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assignment 2 - bedroom painting

CW_5 : histograms

Varied tones

 According to the histogram, most pixels fall on the left side of the picture. When printing, the tones going out of the histograms might not be very accurate, but overall the printing result should be similar to the digital version.

High key tones

 According to the histogram, most pixels fall on the right side of the picture. When printing, the brighter tones might not come out with any details. It would give to the printed version an over saturation in the higher white tones.

Low key tones

.
According to the histogram, most pixels fall on the left side of the picture due to the dark background.  When printing, the darker tones might not come out with details. It could give to the printed version an over saturation in the darker tones



Considering the information on the histogram, my camera properly exposed the high key and low key because there is no clipping in the histogram

The histogram with the most dynamic range is the varied tones picture.

CW2 - assignment 1

slow shutter speed

fast shutter speed

Deep DOF

 Shallow DOF

CW_4 : Lens depth distortion

Telephoto : 55mm

- Little amount of background on the sides

flatness

- No sense of distance between background and subject

- Top surface of the cube and table non visible

- Little background

- About 6 meters away from subject

Wide angle: 17mm

- A lot of background on the sides

- Slight distortion in corners of the picture

- Top surface of the cube and table visible 

- More background

- About a meter away from subject

Telephoto : 55mm

- Little amount of background

- Subjects look close between them

- Flatness

- Subject body proportions accurate

- About 8 meters away from subject

Wide angle : 17mm

- More background

- Subjects look more distant between them 

- Body ratio distortion 

- about 2 meters away from subject

The Take Away 

          - what happens to the width of the background when you go from WA to tele?

WA : wide amount of background + distortion

Tele : small amount of background

          - what happens to the distance between the background  & subject "  "  "  " "  "  "?

WA : more distance between subject and background 

Tele : less distance between the subject and background

          - what happens to the subjects themselves in terms of expansion & contraction (for the width) as well as compaction and enlargement (for front to back)?

WA : body proportion distorted (close to camera : bigger / further away from camera : smaller)

Tele : body ratio respected 

  Scenario: 

go further away and use a telephoto lens

CW_3 : White Balance

AWB

The automatique white balance kept the colours close to reality. The tones are slightly warm, and in comparison to the two other used white balance this is the most suitable one.

 

 Shade

The tones are very warm, to the point where the colours are desaturated and it gives to the picture a very yellow look. The blue in the book is nearly inexistent. This colour distortion is what makes this white balance the least stable among the 3 WB.

fluorescent

There is a lot of purple tones because  of the fluorescent WB. The whites are grey-purple looking and the general picture more cold looking. If suitable, I think this WB could be useful. 

Right WB 

Wrong WB 

Using an inappropriate WB in this case creates a very cold look to the picture. The colours are wrong, as we loose the orange and white colours in the picture. Yet, if you're trying to created a moody cold feel, this WB can be effective.