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  1. Set up the flash with the desired settings, as settings influence the flash duration. My assumptions are:

    1. Manual mode

    2. 1/1, 1/2+0,3-0,6 or 1/2 flash power level

    3. Not sure about "stable color temperature" and it's impact to the frequency at which the flash can fire.. Should be tried out. We'd like a constant color temperature, but not sure what the downside is here, since it's not turned on always.

      1. stable color temperature should be on

    4. "stand by" should be turn off, or set to something like 120 min.

    5. "Delay flash" should be turn off

    6. Modeling lamps should be turned off (which is INTER)

    7. Observe the flash duration time t=0.1. This is presumably done with the "TIMES" function of the flash.

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  1. Aperture:

    • Set the aperture to the lowest number (f/4) for initial focus adjustments.

  2. Focus Adjustment:

    • Adjust focus carefully until the millimeter scale on the ColorChecker card is extremely sharp. Adjust in millimeter increments for precision.

    • Once the ideal focus is achieved, secure the setting using the set screw.

    Exposure and Flash:

    • Gradually adjust the exposure and flash power to achieve proper lighting.

    • Suggested settings:

    • Exposure time: Start at 250 μs. Adjust as needed.

    • Flash power: Increase as aperture values rise

      .

Refining Settings

  1. Aperture and Exposure:

    • Increase the flash power (1/2 power) and aperture to f/10, then modify it up or down as needed for proper exposure.

    • set exposure time to 250 uS

    • If images appear too bright, increase the aperture to f/11 or f/12.

      • Note: Higher f-numbers generally improve image quality up to a point but can degrade quality at extremely high values.

  2. Depth of Field:

    • Aim for an aperture near f/12 or f/13 for optimal depth of field, which increases by approximately 25% at these values.

  3. Strobe Delay:

    • Test strobe delays at 50, 100, 150, and 200 μs, keeping the exposure time constant at 100 μs.

    • If the image is too dark:

      • Lower strobe delay to 25 μs or 0 μs.

      • Adjust exposure back to 250 μs if necessary.

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Date

Lens height above ground

Lens height above pot surface

Focus

Aperture

Exposure

Flash Power

Pot Height

Rough Horizontal FOV

2024-12-022025-01-15

1.70

21

f/13

40070m

20.75 image-20250115-212749.pngImage Added

12-13 image-20250115-212842.pngImage Added

300

1/1

2024-1112-2702

1.70

21

f/10

250

1/2

2024-11-25

1.69cm

1.45 m

21.5

f/4

1/32

24 cm

48-in

2024-11-18

1.66 m

21.5

f/4

1

1/3213

400

1/1

Camera Settings Definitions

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