So sánh nikon d3 và d750 năm 2024
Sensor size is generally a good indicator of the quality of the camera. Sensors can vary greatly in size. As a general rule, the bigger the sensor, the better the image quality. Show
Bigger sensors are more effective because they have more surface area to capture light. An important factor when comparing digital cameras is also camera generation. Generally, newer sensors will outperform the older. Learn more about sensor sizes » Actual sensor sizeNote: Actual size is set to screen → vs 1 : 1 (ratio) Nikon D700 Nikon D750 Surface area: Difference: 1.2 mm² (0.1%) D750 sensor is slightly bigger than D700 sensor (only 0.1% difference). Note: You are comparing sensors of very different generations. There is a gap of 6 years between Nikon D700 (2008) and Nikon D750 (2014). Six years is a lot of time in terms of technology, meaning newer sensors are overall much more efficient than the older ones. Pixel pitch tells you the distance from the center of one pixel (photosite) to the center of the next. It tells you how close the pixels are to each other. The bigger the pixel pitch, the further apart they are and the bigger each pixel is. Bigger pixels tend to have better signal to noise ratio and greater dynamic range. Difference: 2.47 µm (42%) Pixel pitch of D700 is approx. 42% higher than pixel pitch of D750. Pixel area 70.9 µm² 35.4 µm² Pixel or photosite area affects how much light per pixel can be gathered. The larger it is the more light can be collected by a single pixel. Larger pixels have the potential to collect more photons, resulting in greater dynamic range, while smaller pixels provide higher resolutions (more detail) for a given sensor size. Relative pixel sizes: Pixel area difference: 35.5 µm² (100%) A pixel on Nikon D700 sensor is approx. 100% bigger than a pixel on Nikon D750. Pixel density tells you how many million pixels fit or would fit in one square cm of the sensor. Higher pixel density means smaller pixels and lower pixel density means larger pixels. Difference: 1.42 µm (101%) Nikon D750 has approx. 101% higher pixel density than Nikon D700. To learn about the accuracy of these numbers, click here. SpecsTotal megapixels 12.87 24.93 Effective megapixels 12.10 24.30 ISO sensitivity Auto, 100 - 25600 Auto, 100-12800 (expands to 50-51200) Focal length (35mm equiv.) Aperture priority Yes Yes Max. aperture (35mm equiv.) n/a n/a Metering 3D Matrix metering II, Centre weighted, Spot Multi, Center-weighted, Spot, Highlight-weighted Exposure compensation ±5 EV (in 1/3 EV, 1/2 EV, 1 EV steps) ±5 EV (in 1/3 EV, 1/2 EV steps) Min. shutter speed 30 sec 30 sec Max. shutter speed 1/8000 sec 1/4000 sec Viewfinder Optical (pentaprism) Optical (pentaprism) White balance presets 12 12 Screen resolution 920,000 dots 1,228,800 dots Max. video resolution 1920x1080 (60p/50p/30p/25p/24p) Storage types CompactFlash type I, CompactFlash type II, Microdrive SD/SDHC/SDXC USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec) Battery Lithium-Ion EN-EL3e rechargeable battery EN-EL15 rechargeable Li-ion battery Dimensions 147 x 123 x 77 mm 140.5 x 113 x 78 mm Choose cameras to comparePopular comparisons:
DiagonalDiagonal is calculated by the use of Pythagorean theorem: where w = sensor width and h = sensor height Nikon D700 diagonalw = 36.00 mm h = 23.90 mm Diagonal = √ 36.00² + 23.90² = 43.21 mm Nikon D750 diagonalw = 35.90 mm h = 24.00 mm Diagonal = √ 35.90² + 24.00² = 43.18 mm Surface areaSurface area is calculated by multiplying the width and the height of a sensor. D700 sensor areaWidth = 36.00 mm Height = 23.90 mm Surface area = 36.00 × 23.90 = 860.40 mm² D750 sensor areaWidth = 35.90 mm Height = 24.00 mm Surface area = 35.90 × 24.00 = 861.60 mm² Pixel pitchPixel pitch is the distance from the center of one pixel to the center of the next measured in micrometers (µm). It can be calculated with the following formula: Pixel pitch = sensor width in mm × 1000 sensor resolution width in pixels D700 pixel pitchSensor width = 36.00 mm Sensor resolution width = 4275 pixels Pixel pitch = 36.00 × 1000 = 8.42 µm 4275 D750 pixel pitchSensor width = 35.90 mm Sensor resolution width = 6038 pixels Pixel pitch = 35.90 × 1000 = 5.95 µm 6038 Pixel areaThe area of one pixel can be calculated by simply squaring the pixel pitch: Pixel area = pixel pitch² You could also divide sensor surface area with effective megapixels: Pixel area = sensor surface area in mm² effective megapixels D700 pixel areaPixel pitch = 8.42 µm Pixel area = 8.42² = 70.9 µm² D750 pixel areaPixel pitch = 5.95 µm Pixel area = 5.95² = 35.4 µm² Pixel densityPixel density can be calculated with the following formula: Pixel density = ( sensor resolution width in pixels )² / 1000000 sensor width in cm One could also use this formula: Pixel density = effective megapixels × 1000000 / 10000 sensor surface area in mm² D700 pixel densitySensor resolution width = 4275 pixels Sensor width = 3.6 cm Pixel density = (4275 / 3.6)² / 1000000 = 1.41 MP/cm² D750 pixel densitySensor resolution width = 6038 pixels Sensor width = 3.59 cm Pixel density = (6038 / 3.59)² / 1000000 = 2.83 MP/cm² Sensor resolutionSensor resolution is calculated from sensor size and effective megapixels. It's slightly higher than maximum (not interpolated) image resolution which is usually stated on camera specifications. Sensor resolution is used in pixel pitch, pixel area, and pixel density formula. For sake of simplicity, we're going to calculate it in 3 stages. 1. First we need to find the ratio between horizontal and vertical length by dividing the former with the latter (aspect ratio). It's usually 1.33 (4:3) or 1.5 (3:2), but not always. 2. With the ratio (r) known we can calculate the X from the formula below, where X is a vertical number of pixels: (X × r) × X = effective megapixels × 1000000 → X = √ effective megapixels × 1000000 r 3. To get sensor resolution we then multiply X with the corresponding ratio: Resolution horizontal: X × r Resolution vertical: X D700 sensor resolutionSensor width = 36.00 mm Sensor height = 23.90 mm Effective megapixels = 12.10 r = 36.00/23.90 = 1.51 X = √ 12.10 × 1000000 = 2831 1.51 Resolution horizontal: X × r = 2831 × 1.51 = 4275 Resolution vertical: X = 2831 Sensor resolution = 4275 x 2831 D750 sensor resolutionSensor width = 35.90 mm Sensor height = 24.00 mm Effective megapixels = 24.30 r = 35.90/24.00 = 1.5 X = √ 24.30 × 1000000 = 4025 1.5 Resolution horizontal: X × r = 4025 × 1.5 = 6038 Resolution vertical: X = 4025 Sensor resolution = 6038 x 4025 Crop factorCrop factor or focal length multiplier is calculated by dividing the diagonal of 35 mm film (43.27 mm) with the diagonal of the sensor. Crop factor = 43.27 mm sensor diagonal in mm D700 crop factorSensor diagonal in mm = 43.21 mm Crop factor = 43.27 = 1 43.21 D750 crop factorSensor diagonal in mm = 43.18 mm Crop factor = 43.27 = 1 43.18 35 mm equivalent apertureEquivalent aperture (in 135 film terms) is calculated by multiplying lens aperture with crop factor (a.k.a. focal length multiplier). D700 equivalent apertureAperture is a lens characteristic, so it's calculated only for fixed lens cameras. If you want to know the equivalent aperture for Nikon D750, take the aperture of the lens you're using and multiply it with crop factor. |