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Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP2

Portability
88
Imaging
52
Features
37
Overall
46
Ricoh GXR GR Lens A12 28mm F2.5 front
 
Sigma DP2 front
Portability
86
Imaging
44
Features
28
Overall
37

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP2 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
  • Launched September 2010
Sigma DP2
(Full Review)
  • 5MP - APS-C Sensor
  • 2.5" Fixed Screen
  • ISO 200 - 3200
  • 320 x 240 video
  • 41mm (F) lens
  • 280g - 113 x 60 x 56mm
  • Released September 2009
  • New Model is Sigma DP2s
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Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP2 Overview

Below, we will be evaluating the Ricoh GXR GR Lens A12 28mm F2.5 and Sigma DP2, former is a Advanced Mirrorless while the latter is a Large Sensor Compact by manufacturers Ricoh and Sigma. There exists a considerable gap among the image resolutions of the GXR GR Lens A12 28mm F2.5 (12MP) and DP2 (5MP) but they come with the exact same sensor size (APS-C).

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The GXR GR Lens A12 28mm F2.5 was manufactured 13 months after the DP2 which makes the cameras a generation away from one another. Both of these cameras come with different body type with the Ricoh GXR GR Lens A12 28mm F2.5 being a Rangefinder-style mirrorless camera and the Sigma DP2 being a Large Sensor Compact camera.

Before diving in to a comprehensive comparison, below is a short synopsis of how the GXR GR Lens A12 28mm F2.5 scores versus the DP2 in the way of portability, imaging, features and an overall score.

Photography Glossary
	
	

Reasons to pick Ricoh GXR GR Lens A12 28mm F2.5 over the Sigma DP2

 GXR GR Lens A12 28mm F2.5 DP2 
ReleasedSeptember 2010September 2009More modern by 13 months
Screen dimension3"2.5"Bigger screen (+0.5")
Screen resolution920k230kCrisper screen (+690k dot)

Reasons to pick Sigma DP2 over the Ricoh GXR GR Lens A12 28mm F2.5

 DP2 GXR GR Lens A12 28mm F2.5 

Common features in the Ricoh GXR GR Lens A12 28mm F2.5 and Sigma DP2

 GXR GR Lens A12 28mm F2.5 DP2 
Manual focus Very precise focusing
Screen typeFixed Fixed Fixed screen
Selfie screen Absent selfie screen
Touch screen Neither provides Touch screen

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP2 Physical Comparison

For those who are looking to carry around your camera often, you will need to factor its weight and dimensions. The Ricoh GXR GR Lens A12 28mm F2.5 provides external dimensions of 113mm x 70mm x 56mm (4.4" x 2.8" x 2.2") with a weight of 140 grams (0.31 lbs) and the Sigma DP2 has dimensions of 113mm x 60mm x 56mm (4.4" x 2.4" x 2.2") and a weight of 280 grams (0.62 lbs).

Compare the Ricoh GXR GR Lens A12 28mm F2.5 and Sigma DP2 in our brand new Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Take into consideration, the weight of an ILC will vary based on the lens you are employing at that moment. Here is the front view physical size comparison of the GXR GR Lens A12 28mm F2.5 against the DP2.

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP2 size comparison

Taking into account dimensions and weight, the portability score of the GXR GR Lens A12 28mm F2.5 and DP2 is 88 and 86 respectively.

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP2 top view buttons comparison

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP2 Sensor Comparison

More often than not, it is very difficult to see the gap in sensor sizes purely by seeing technical specs. The picture below might provide you a more clear sense of the sensor sizes in the GXR GR Lens A12 28mm F2.5 and DP2.

As you can tell, both of the cameras have got the exact same sensor measurements albeit not the same megapixels. You can expect the Ricoh GXR GR Lens A12 28mm F2.5 to provide more detail due to its extra 7 Megapixels. Higher resolution will allow you to crop photographs much more aggressively. The newer GXR GR Lens A12 28mm F2.5 is going to have a benefit with regard to sensor innovation.

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP2 sensor size comparison

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP2 Screen and ViewFinder

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP2 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Portrait photography advice
Sigma DP2 Portrait photography advice
57
has manual focus
sensor size is decent (APS-C)
comes with face detection focus
delivers RAW files
doesn't have liveview
MP count low (12MP)
56
manual focus
sensor size is good (APS-C)
delivers RAW formats
megapixel count low (5MP)
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Street Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Street photography information
Sigma DP2 Street photography information
70
sensor size is decent (APS-C)
delivers RAW files
lighter than competition (140g)
screen does not articulate
does not have image stabilization
67
sensor size is good (APS-C)
delivers RAW formats
lighter than competitors (280g)
no moving screen
does not have image stabilization
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Sports Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Sports photography information
Sigma DP2 Sports photography information
32
sensor size is decent (APS-C)
can't change focal length (28mm)
doesn't have liveview
slow frames per second (5.0 fps)
does not have image stabilization
MP count low (12MP)
not so great battery life (320 per charge)
lack of phase detect auto focus
30
sensor size is good (APS-C)
can't change focal length (41mm)
slow fps (3.0 fps)
does not have image stabilization
megapixel count low (5MP)
lack of phase detect AF
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Travel Comparison

Ricoh GXR GR Lens A12 28mm F2.5 as a Travel photography camera
Sigma DP2 as a Travel photography camera
58
lighter than competition (140 grams)
flash built-in
not so great battery life (320 shots)
MP count low (12 megapixels)
display isn't selfie friendly
somewhat slow max aperture (f2.5)
67
lighter than competitors (280g)
has built in flash
fast maximum aperture (f)
megapixel count low (5 megapixels)
screen is not selfie friendly
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Landscape Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Landscape photography factors
Sigma DP2 Landscape photography factors
47
has manual focus
good sized screen (3")
sensor size is decent (APS-C)
delivers RAW files
cannot change lens (fixed lens mount)
can't change focal length (28mm)
somewhat slow max aperture (f2.5)
doesn't have liveview
does not have image stabilization
MP count low (12 megapixels)
not so great battery life (320 per charge)
48
manual focus
fast maximum aperture (f)
sensor size is good (APS-C)
delivers RAW formats
can't switch lenses (fixed lens mount)
can't change focal length (41mm)
small screen (2.5")
does not have image stabilization
megapixel count low (5MP)
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Vlogging Comparison

Ricoh GXR GR Lens A12 28mm F2.5 as a Vlogging camera
Sigma DP2 as a Vlogging camera
28
comes with face detection focus
lighter than competition (140g)
somewhat slow max aperture (f2.5)
display isn't selfie friendly
does not have image stabilization
low quality video (1280 x 720 pixels)
does not have external mic support
28
fast maximum aperture (f)
lighter than competitors (280g)
screen is not selfie friendly
does not have image stabilization
low video resolution (320 x 240 resolution)
no mic socket
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Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP2 Specifications

Detailed spec comparison table for Ricoh GXR GR Lens A12 28mm F2.5 and Sigma DP2
 Ricoh GXR GR Lens A12 28mm F2.5Sigma DP2
General Information
Make Ricoh Sigma
Model type Ricoh GXR GR Lens A12 28mm F2.5 Sigma DP2
Type Advanced Mirrorless Large Sensor Compact
Launched 2010-09-21 2009-09-21
Physical type Rangefinder-style mirrorless Large Sensor Compact
Sensor Information
Processor Chip GR Engine III -
Sensor type CMOS CMOS (Foveon X3)
Sensor size APS-C APS-C
Sensor dimensions 23.6 x 15.7mm 20.7 x 13.8mm
Sensor surface area 370.5mm² 285.7mm²
Sensor resolution 12 megapixel 5 megapixel
Anti alias filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 3:2 and 16:9
Max resolution 4288 x 2848 2640 x 1760
Max native ISO 3200 3200
Lowest native ISO 200 200
RAW photos
Autofocusing
Manual focusing
Touch focus
AF continuous
Single AF
Tracking AF
AF selectice
AF center weighted
Multi area AF
Live view AF
Face detection AF
Contract detection AF
Phase detection AF
Lens
Lens support fixed lens fixed lens
Lens zoom range 28mm (1x) 41mm (1x)
Max aperture f/2.5 -
Crop factor 1.5 1.7
Screen
Screen type Fixed Type Fixed Type
Screen size 3 inch 2.5 inch
Resolution of screen 920 thousand dots 230 thousand dots
Selfie friendly
Liveview
Touch capability
Screen technology TFT color LCD -
Viewfinder Information
Viewfinder Electronic (optional) None
Features
Minimum shutter speed 180 secs 15 secs
Fastest shutter speed 1/3200 secs 1/2000 secs
Continuous shutter rate 5.0fps 3.0fps
Shutter priority
Aperture priority
Manual mode
Exposure compensation Yes Yes
Change WB
Image stabilization
Built-in flash
Flash distance - 4.30 m
Flash options Auto, On, Off, Red-Eye, Slow Sync, Manual Forced Flash, Red-Eye Reduction, Slow Synchro
External flash
Auto exposure bracketing
WB bracketing
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Supported video resolutions 1280 x 720 (24 fps), 640 x 480 (24 fps), 320 x 240 (24 fps) 320 x 240 (30 fps)
Max video resolution 1280x720 320x240
Video format MPEG-4 Motion JPEG
Mic port
Headphone port
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 proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 140 grams (0.31 lbs) 280 grams (0.62 lbs)
Dimensions 113 x 70 x 56mm (4.4" x 2.8" x 2.2") 113 x 60 x 56mm (4.4" x 2.4" x 2.2")
DXO scores
DXO Overall rating not tested not tested
DXO Color Depth rating not tested not tested
DXO Dynamic range rating not tested not tested
DXO Low light rating not tested not tested
Other
Battery life 320 photos -
Battery type Battery Pack -
Battery ID DB-90 -
Self timer Yes (2 or 10 sec, 10 sec (3 images) ) Yes (2 or 10 sec)
Time lapse shooting
Storage type SD/SDHC, Internal SD/SDHC/MMC card
Card slots Single Single
Launch pricing $566 $649