Jenoptik JD C 1.3 LCD vs. Sony Alpha a5100

Comparison

change cameras »
JD C 1.3 LCD image
vs
Alpha a5100 image
Jenoptik JD C 1.3 LCD Sony Alpha a5100
check price » check price »
Megapixels
1.30
24.30
Max. image resolution
1600 x 1200
6000 x 4000

Sensor

Sensor type
CMOS
CMOS
Sensor size
1/2" (~ 6.4 x 4.8 mm)
23.5 x 15.6 mm
Sensor resolution
1315 x 989
6058 x 4012
Diagonal
8.00 mm
28.21 mm
Sensor size comparison
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.

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 size

Note: Actual size is set to screen → change »
vs
1 : 11.93
(ratio)
Jenoptik JD C 1.3 LCD Sony Alpha a5100
Surface area:
30.72 mm² vs 366.60 mm²
Difference: 335.88 mm² (1093%)
Alpha a5100 sensor is approx. 11.93x bigger than JD C 1.3 LCD sensor.
Note: You are comparing sensors of vastly different generations. There is a gap of 12 years between Jenoptik JD C 1.3 LCD (2002) and Sony Alpha a5100 (2014). Twelve years is a huge amount of time, technology wise, resulting in newer sensor being much more efficient than the older one.
Pixel pitch
4.87 µm
3.88 µm
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: 0.99 µm (26%)
Pixel pitch of JD C 1.3 LCD is approx. 26% higher than pixel pitch of Alpha a5100.
Pixel area
23.72 µm²
15.05 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:
vs
Pixel area difference: 8.67 µm² (58%)
A pixel on Jenoptik JD C 1.3 LCD sensor is approx. 58% bigger than a pixel on Sony Alpha a5100.
Pixel density
4.22 MP/cm²
6.65 MP/cm²
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: 2.43 µm (58%)
Sony Alpha a5100 has approx. 58% higher pixel density than Jenoptik JD C 1.3 LCD.
To learn about the accuracy of these numbers, click here.



Specs

Jenoptik JD C 1.3 LCD
Sony Alpha a5100
Crop factor
5.41
1.53
Total megapixels
24.70
Effective megapixels
24.30
Optical zoom
No
Digital zoom
Yes
Yes
ISO sensitivity
100
Auto, 100-25600
RAW
Manual focus
Normal focus range
100 cm
Macro focus range
20 cm
Focal length (35mm equiv.)
46 mm
Aperture priority
No
Yes
Max. aperture
f2.8
Max. aperture (35mm equiv.)
f15.1
n/a
Metering
Centre weighted
Multi, Center-weighted, Spot
Exposure compensation
±2 EV (in 1/3 EV steps)
±3 EV (in 1/3 EV steps)
Shutter priority
No
Yes
Min. shutter speed
1/4 sec
30 sec
Max. shutter speed
1/4000 sec
1/4000 sec
Built-in flash
External flash
Viewfinder
Optical
None
White balance presets
6
10
Screen size
1.5"
3"
Screen resolution
921,600 dots
Video capture
Max. video resolution
1920x1080 (60p/60i/30p/24p)
Storage types
Secure Digital
SD/SDHC/SDXC, Memory Stick Pro Duo/Pro-HG Duo
USB
USB 1.1
USB 2.0 (480 Mbit/sec)
HDMI
Wireless
GPS
Battery
4x AAA
NP-FW50
Weight
110 g
283 g
Dimensions
97 x 28 x 63 mm
109.6 x 62.8 x 35.7 mm
Year
2002
2014




Choose cameras to compare

vs

Diagonal

Diagonal is calculated by the use of Pythagorean theorem:
Diagonal =  w² + h²
where w = sensor width and h = sensor height

Jenoptik JD C 1.3 LCD diagonal

The diagonal of JD C 1.3 LCD sensor is not 1/2 or 0.5" (12.7 mm) as you might expect, but approximately two thirds of that value - 8 mm. If you want to know why, see sensor sizes.

w = 6.40 mm
h = 4.80 mm
Diagonal =  6.40² + 4.80²   = 8.00 mm

Sony Alpha a5100 diagonal

w = 23.50 mm
h = 15.60 mm
Diagonal =  23.50² + 15.60²   = 28.21 mm


Surface area

Surface area is calculated by multiplying the width and the height of a sensor.

JD C 1.3 LCD sensor area

Width = 6.40 mm
Height = 4.80 mm

Surface area = 6.40 × 4.80 = 30.72 mm²

Alpha a5100 sensor area

Width = 23.50 mm
Height = 15.60 mm

Surface area = 23.50 × 15.60 = 366.60 mm²


Pixel pitch

Pixel 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

JD C 1.3 LCD pixel pitch

Sensor width = 6.40 mm
Sensor resolution width = 1315 pixels
Pixel pitch =   6.40  × 1000  = 4.87 µm
1315

Alpha a5100 pixel pitch

Sensor width = 23.50 mm
Sensor resolution width = 6058 pixels
Pixel pitch =   23.50  × 1000  = 3.88 µm
6058


Pixel area

The 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

JD C 1.3 LCD pixel area

Pixel pitch = 4.87 µm

Pixel area = 4.87² = 23.72 µm²

Alpha a5100 pixel area

Pixel pitch = 3.88 µm

Pixel area = 3.88² = 15.05 µm²


Pixel density

Pixel 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

JD C 1.3 LCD pixel density

Sensor resolution width = 1315 pixels
Sensor width = 0.64 cm

Pixel density = (1315 / 0.64)² / 1000000 = 4.22 MP/cm²

Alpha a5100 pixel density

Sensor resolution width = 6058 pixels
Sensor width = 2.35 cm

Pixel density = (6058 / 2.35)² / 1000000 = 6.65 MP/cm²


Sensor resolution

Sensor 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

JD C 1.3 LCD sensor resolution

Sensor width = 6.40 mm
Sensor height = 4.80 mm
Effective megapixels = 1.30
r = 6.40/4.80 = 1.33
X =  1.30 × 1000000  = 989
1.33
Resolution horizontal: X × r = 989 × 1.33 = 1315
Resolution vertical: X = 989

Sensor resolution = 1315 x 989

Alpha a5100 sensor resolution

Sensor width = 23.50 mm
Sensor height = 15.60 mm
Effective megapixels = 24.30
r = 23.50/15.60 = 1.51
X =  24.30 × 1000000  = 4012
1.51
Resolution horizontal: X × r = 4012 × 1.51 = 6058
Resolution vertical: X = 4012

Sensor resolution = 6058 x 4012


Crop factor

Crop 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


JD C 1.3 LCD crop factor

Sensor diagonal in mm = 8.00 mm
Crop factor =   43.27  = 5.41
8.00

Alpha a5100 crop factor

Sensor diagonal in mm = 28.21 mm
Crop factor =   43.27  = 1.53
28.21

35 mm equivalent aperture

Equivalent aperture (in 135 film terms) is calculated by multiplying lens aperture with crop factor (a.k.a. focal length multiplier).

JD C 1.3 LCD equivalent aperture

Crop factor = 5.41
Aperture = f2.8

35-mm equivalent aperture = (f2.8) × 5.41 = f15.1

Alpha a5100 equivalent aperture

Aperture is a lens characteristic, so it's calculated only for fixed lens cameras. If you want to know the equivalent aperture for Sony Alpha a5100, take the aperture of the lens you're using and multiply it with crop factor.

Crop factor for Sony Alpha a5100 is 1.53

Enter your screen size (diagonal)

My screen size is  inches



Actual size is currently adjusted to screen.

If your screen (phone, tablet, or monitor) is not in diagonal, then the actual size of a sensor won't be shown correctly.