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Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma SD15

Portability
88
Imaging
53
Features
37
Overall
46
Ricoh GXR GR Lens A12 28mm F2.5 front
 
Sigma SD15 front
Portability
59
Imaging
44
Features
45
Overall
44

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma SD15 Key Specs

Ricoh GXR GR Lens A12 28mm F2.5
(Full Review)
  • 12MP - APS-C Sensor
  • 3" Fixed Screen
  • ISO 200 - 3200
  • 1280 x 720 video
  • 28mm (F2.5) lens
  • 140g - 113 x 70 x 56mm
  • Introduced September 2010
Sigma SD15
(Full Review)
  • 5MP - APS-C Sensor
  • 3" Fixed Screen
  • ISO 100 - 1600 (Bump to 3200)
  • No Video
  • Sigma SA Mount
  • 750g - 144 x 107 x 81mm
  • Launched February 2010
  • Old Model is Sigma SD14
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Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma SD15 Overview

In this write-up, we will be looking at the Ricoh GXR GR Lens A12 28mm F2.5 versus Sigma SD15, former is a Advanced Mirrorless while the latter is a Advanced DSLR by companies Ricoh and Sigma. There exists a noticeable gap between the sensor resolutions of the GXR GR Lens A12 28mm F2.5 (12MP) and SD15 (5MP) but they enjoy the same exact sensor sizing (APS-C).

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The GXR GR Lens A12 28mm F2.5 was introduced 8 months after the SD15 so they are of a similar age. Both cameras offer different body type with the Ricoh GXR GR Lens A12 28mm F2.5 being a Rangefinder-style mirrorless camera and the Sigma SD15 being a Mid-size SLR camera.

Before getting through a comprehensive comparison, below is a short overview of how the GXR GR Lens A12 28mm F2.5 matches up versus the SD15 with respect to portability, imaging, features and an overall score.

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Reasons to pick Ricoh GXR GR Lens A12 28mm F2.5 over the Sigma SD15

 GXR GR Lens A12 28mm F2.5 SD15 
LaunchedSeptember 2010February 2010More modern by 8 months
Screen resolution920k460kCrisper screen (+460k dot)

Reasons to pick Sigma SD15 over the Ricoh GXR GR Lens A12 28mm F2.5

 SD15 GXR GR Lens A12 28mm F2.5 

Common features in the Ricoh GXR GR Lens A12 28mm F2.5 and Sigma SD15

 GXR GR Lens A12 28mm F2.5 SD15 
Focus manually Very exact focus
Screen typeFixed Fixed Fixed screen
Screen sizing3"3"Equivalent screen measurement
Selfie screen Neither provides selfie screen
Touch friendly screen Neither provides Touch friendly screen

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma SD15 Physical Comparison

For anyone who is going to carry around your camera frequently, you should take into account its weight and size. The Ricoh GXR GR Lens A12 28mm F2.5 provides outer measurements of 113mm x 70mm x 56mm (4.4" x 2.8" x 2.2") accompanied by a weight of 140 grams (0.31 lbs) whilst the Sigma SD15 has specifications of 144mm x 107mm x 81mm (5.7" x 4.2" x 3.2") along with a weight of 750 grams (1.65 lbs).

Contrast the Ricoh GXR GR Lens A12 28mm F2.5 versus Sigma SD15 in our brand new Camera & Lens Size Comparison Tool. Camera Size Comparison with Lenses

Keep in mind, the weight of an ILC will differ depending on the lens you are working with during that time. Below is the front view dimension comparison of the GXR GR Lens A12 28mm F2.5 against the SD15.

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma SD15 size comparison

Looking at dimensions and weight, the portability grade of the GXR GR Lens A12 28mm F2.5 and SD15 is 88 and 59 respectively.

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma SD15 top view buttons comparison

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma SD15 Sensor Comparison

Sometimes, its hard to imagine the gap between sensor sizes simply by reviewing specs. The image here might offer you a clearer sense of the sensor measurements in the GXR GR Lens A12 28mm F2.5 and SD15.

As you can plainly see, both of these cameras enjoy the same exact sensor sizing albeit different resolution. You can expect the Ricoh GXR GR Lens A12 28mm F2.5 to offer you more detail using its extra 7 Megapixels. Higher resolution will also allow you to crop pictures far more aggressively. The more recent GXR GR Lens A12 28mm F2.5 provides an edge with regard to sensor technology.

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma SD15 sensor size comparison

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma SD15 Screen and ViewFinder

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma SD15 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Ricoh GXR GR Lens A12 28mm F2.5 as a Portrait photography camera
Sigma SD15 as a Portrait photography camera
58
has manual focus
decent sensor size (APS-C)
supports face detect focusing
delivers RAW files
no liveview feature
MP count low (12MP)
50
has manual focus
sensor size is nice (APS-C)
exports RAW files
no liveview
MP count low (5 megapixels)
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Street Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Street photography details
Sigma SD15 Street photography details
70
decent sensor size (APS-C)
delivers RAW files
lighter than average (140 grams)
no articulating screen
does not have image stabilization
52
sensor size is nice (APS-C)
exports RAW files
screen does not articulate
lack of image stabilization
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Sports Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Sports photography advice
Sigma SD15 Sports photography advice
32
decent sensor size (APS-C)
focal length is fixed (28mm)
no liveview feature
very slow continuous shooting (5.0 fps)
does not have image stabilization
MP count low (12MP)
bad battery life (320 CIPA)
has no phase detect AF
38
sensor size is nice (APS-C)
supports phase detect AF
no liveview
slow continuous shooting (3.0 fps)
lack of image stabilization
MP count low (5 megapixels)
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Travel Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Travel photography info
Sigma SD15 Travel photography info
59
lighter than average (140 grams)
flash built-in
bad battery life (320 per charge)
MP count low (12 megapixels)
screen isn't selfie friendly
sluggish max aperture (f2.5)
42
flash built-in
no Timelapse recording
MP count low (5 megapixels)
screen isn't selfie friendly
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Landscape Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Landscape photography factors
Sigma SD15 Landscape photography factors
48
has manual focus
screen is a decent size (3 inches)
decent sensor size (APS-C)
delivers RAW files
cannot swap lenses (fixed lens mount)
focal length is fixed (28mm)
sluggish max aperture (f2.5)
no liveview feature
does not have image stabilization
MP count low (12MP)
bad battery life (320 shots)
51
has manual focus
swap lenses (Sigma SA mount)
nice screen size (3 inches)
sensor size is nice (APS-C)
exports RAW files
no liveview
lack of image stabilization
MP count low (5MP)
no Timelapse recording
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Vlogging Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Vlogging information
Sigma SD15 Vlogging information
28
supports face detect focusing
lighter than average (140 grams)
sluggish max aperture (f2.5)
screen isn't selfie friendly
does not have image stabilization
video resolution low (1280 x 720 pixels)
does not have microphone support
9
can't shoot video
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Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma SD15 Specifications

Detailed spec comparison table for Ricoh GXR GR Lens A12 28mm F2.5 and Sigma SD15
 Ricoh GXR GR Lens A12 28mm F2.5Sigma SD15
General Information
Manufacturer Ricoh Sigma
Model Ricoh GXR GR Lens A12 28mm F2.5 Sigma SD15
Type Advanced Mirrorless Advanced DSLR
Introduced 2010-09-21 2010-02-20
Physical type Rangefinder-style mirrorless Mid-size SLR
Sensor Information
Processor Chip GR Engine III True II
Sensor type CMOS CMOS (Foveon X3)
Sensor size APS-C APS-C
Sensor measurements 23.6 x 15.7mm 20.7 x 13.8mm
Sensor surface area 370.5mm² 285.7mm²
Sensor resolution 12 megapixel 5 megapixel
Anti aliasing filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 3:2
Maximum resolution 4288 x 2848 2640 x 1760
Maximum native ISO 3200 1600
Maximum boosted ISO - 3200
Lowest native ISO 200 100
RAW files
Lowest boosted ISO - 50
Autofocusing
Focus manually
Touch focus
Continuous autofocus
Autofocus single
Autofocus tracking
Selective autofocus
Center weighted autofocus
Autofocus multi area
Autofocus live view
Face detection autofocus
Contract detection autofocus
Phase detection autofocus
Lens
Lens mounting type fixed lens Sigma SA
Lens focal range 28mm (1x) -
Max aperture f/2.5 -
Total lenses - 76
Crop factor 1.5 1.7
Screen
Type of screen Fixed Type Fixed Type
Screen size 3" 3"
Resolution of screen 920k dots 460k dots
Selfie friendly
Liveview
Touch functionality
Screen tech TFT color LCD -
Viewfinder Information
Viewfinder Electronic (optional) Optical (pentaprism)
Viewfinder coverage - 96 percent
Viewfinder magnification - 0.6x
Features
Lowest shutter speed 180s 30s
Highest shutter speed 1/3200s 1/4000s
Continuous shooting rate 5.0 frames/s 3.0 frames/s
Shutter priority
Aperture priority
Manually set exposure
Exposure compensation Yes Yes
Change white balance
Image stabilization
Inbuilt flash
Flash settings Auto, On, Off, Red-Eye, Slow Sync, Manual -
Hot shoe
Auto exposure bracketing
White balance bracketing
Highest flash synchronize - 1/180s
Exposure
Multisegment exposure
Average exposure
Spot exposure
Partial exposure
AF area exposure
Center weighted exposure
Video features
Video resolutions 1280 x 720 (24 fps), 640 x 480 (24 fps), 320 x 240 (24 fps) -
Maximum video resolution 1280x720 None
Video data format MPEG-4 -
Microphone support
Headphone support
Connectivity
Wireless None None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environment sealing
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 140g (0.31 lb) 750g (1.65 lb)
Dimensions 113 x 70 x 56mm (4.4" x 2.8" x 2.2") 144 x 107 x 81mm (5.7" x 4.2" x 3.2")
DXO scores
DXO All around score not tested not tested
DXO Color Depth score not tested not tested
DXO Dynamic range score not tested not tested
DXO Low light score not tested not tested
Other
Battery life 320 images -
Type of battery Battery Pack -
Battery model DB-90 -
Self timer Yes (2 or 10 sec, 10 sec (3 images) ) Yes (10 sec)
Time lapse shooting
Type of storage SD/SDHC, Internal SD/SDHC card
Card slots One One
Price at launch $566 $1,500