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Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP1

Portability
88
Imaging
53
Features
37
Overall
46
Ricoh GXR GR Lens A12 28mm F2.5 front
 
Sigma DP1 front
Portability
87
Imaging
43
Features
30
Overall
37

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP1 Key Specs

Ricoh GXR GR Lens A12 28mm F2.5
(Full Review)
  • 12MP - APS-C Sensor
  • 3" Fixed Display
  • ISO 200 - 3200
  • 1280 x 720 video
  • 28mm (F2.5) lens
  • 140g - 113 x 70 x 56mm
  • Launched September 2010
Sigma DP1
(Full Review)
  • 5MP - APS-C Sensor
  • 2.5" Fixed Screen
  • ISO 100 - 800
  • No Video
  • 28mm (F) lens
  • 270g - 113 x 60 x 50mm
  • Released May 2008
  • Renewed by Sigma DP1s
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Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP1 Overview

Below is a complete analysis of the Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP1, former being a Advanced Mirrorless while the latter is a Large Sensor Compact by rivals Ricoh and Sigma. There is a large difference among the image resolutions of the GXR GR Lens A12 28mm F2.5 (12MP) and DP1 (5MP) but both cameras have the identical sensor measurements (APS-C).

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The GXR GR Lens A12 28mm F2.5 was unveiled 2 years later than the DP1 and that is a fairly serious difference as far as camera tech is concerned. Both of the cameras feature different body design with the Ricoh GXR GR Lens A12 28mm F2.5 being a Rangefinder-style mirrorless camera and the Sigma DP1 being a Large Sensor Compact camera.

Before delving right into a full comparison, here is a simple highlight of how the GXR GR Lens A12 28mm F2.5 matches up versus the DP1 for portability, imaging, features and an overall grade.

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Reasons to pick Ricoh GXR GR Lens A12 28mm F2.5 over the Sigma DP1

 GXR GR Lens A12 28mm F2.5 DP1 
ReleasedSeptember 2010May 2008More recent by 29 months
Screen size3"2.5"Bigger screen (+0.5")
Screen resolution920k230kClearer screen (+690k dot)

Reasons to pick Sigma DP1 over the Ricoh GXR GR Lens A12 28mm F2.5

 DP1 GXR GR Lens A12 28mm F2.5 

Common features in the Ricoh GXR GR Lens A12 28mm F2.5 and Sigma DP1

 GXR GR Lens A12 28mm F2.5 DP1 
Manual focus More exact focus
Screen typeFixed Fixed Fixed screen
Selfie screen Neither provides selfie screen
Touch screen Neither provides Touch screen

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP1 Physical Comparison

If you are planning to lug around your camera regularly, you should consider its weight and volume. 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) and the Sigma DP1 has sizing of 113mm x 60mm x 50mm (4.4" x 2.4" x 2.0") and a weight of 270 grams (0.60 lbs).

Compare the Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP1 in our newest Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Remember that, the weight of an ILC will differ based on the lens you are utilizing at the time. Below is a front view physical size comparison of the GXR GR Lens A12 28mm F2.5 compared to the DP1.

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP1 size comparison

Factoring in size and weight, the portability rating of the GXR GR Lens A12 28mm F2.5 and DP1 is 88 and 87 respectively.

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP1 top view buttons comparison

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP1 Sensor Comparison

Usually, it is very tough to picture the difference in sensor measurements only by going through technical specs. The graphic underneath may offer you a better sense of the sensor measurements in the GXR GR Lens A12 28mm F2.5 and DP1.

As you can tell, both the cameras feature the identical sensor size albeit different megapixels. You can expect the Ricoh GXR GR Lens A12 28mm F2.5 to produce more detail having an extra 7MP. Higher resolution will also allow you to crop photographs way more aggressively. The newer GXR GR Lens A12 28mm F2.5 should have a benefit with regard to sensor technology.

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP1 sensor size comparison

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP1 Screen and ViewFinder

Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP1 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Portrait photography features
Sigma DP1 Portrait photography features
58
has manual focus
sensor size is nice (APS-C)
supports face detect focus
saves RAW files
doesn't have liveview
low MP (12MP)
55
manual focus
sensor size is good (APS-C)
exports RAW formats
sensor resolution low (5MP)
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Street Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Street photography highlights
Sigma DP1 Street photography highlights
70
sensor size is nice (APS-C)
saves RAW files
lighter than competition (140 grams)
fixed screen
lack of image stabilization
64
sensor size is good (APS-C)
exports RAW formats
lighter than competition in class (270 grams)
no moving screen
no image stabilization
max ISO too low (800)
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Sports Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Sports photography factors
Sigma DP1 Sports photography factors
32
sensor size is nice (APS-C)
can't change focal length (28mm)
doesn't have liveview
low frames per second (5.0 frames/s)
lack of image stabilization
low MP (12 megapixels)
terrible battery (320 shots)
does not have phase detect auto focus
31
sensor size is good (APS-C)
fixed focal length (28mm)
no image stabilization
sensor resolution low (5 megapixels)
lacks phase detect AF
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Travel Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Travel photography features
Sigma DP1 Travel photography features
59
lighter than competition (140g)
has built in flash
terrible battery (320 CIPA)
low MP (12 megapixels)
screen isn't selfie friendly
sluggish max aperture (f2.5)
63
lighter than competition in class (270 grams)
has built in flash
fast max aperture (f)
does not have Time Lapse function
sensor resolution low (5 megapixels)
doesn't offer selfie friendly display
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Landscape Comparison

Ricoh GXR GR Lens A12 28mm F2.5 Landscape photography information
Sigma DP1 Landscape photography information
48
has manual focus
pretty good screen size (3 inch)
sensor size is nice (APS-C)
saves RAW files
lens is fixed (fixed lens mount)
can't change focal length (28mm)
sluggish max aperture (f2.5)
doesn't have liveview
lack of image stabilization
low MP (12MP)
terrible battery (320 CIPA)
44
manual focus
fast max aperture (f)
sensor size is good (APS-C)
exports RAW formats
lens is fixed (fixed lens mount)
fixed focal length (28mm)
tiny screen (2.5 inches)
no image stabilization
sensor resolution low (5 megapixels)
max ISO too low (800)
does not have Time Lapse function
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Vlogging Comparison

Vlogging with Ricoh GXR GR Lens A12 28mm F2.5
Vlogging with Sigma DP1
28
supports face detect focus
lighter than competition (140g)
sluggish max aperture (f2.5)
screen isn't selfie friendly
lack of image stabilization
video res low (1280 x 720 resolution)
lack of microphone support
9
no video
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Ricoh GXR GR Lens A12 28mm F2.5 vs Sigma DP1 Specifications

Detailed spec comparison table for Ricoh GXR GR Lens A12 28mm F2.5 and Sigma DP1
 Ricoh GXR GR Lens A12 28mm F2.5Sigma DP1
General Information
Brand Name Ricoh Sigma
Model type Ricoh GXR GR Lens A12 28mm F2.5 Sigma DP1
Category Advanced Mirrorless Large Sensor Compact
Launched 2010-09-21 2008-05-19
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 megapixels 5 megapixels
Anti alias filter
Aspect ratio 1:1, 4:3, 3:2 and 16:9 3:2
Full resolution 4288 x 2848 2640 x 1760
Max native ISO 3200 800
Minimum native ISO 200 100
RAW pictures
Autofocusing
Focus manually
Touch to focus
Autofocus continuous
Autofocus single
Autofocus tracking
Autofocus selectice
Autofocus center weighted
Multi area autofocus
Live view autofocus
Face detect focus
Contract detect focus
Phase detect focus
Lens
Lens mount type fixed lens fixed lens
Lens zoom range 28mm (1x) 28mm (1x)
Maximal aperture f/2.5 -
Focal length multiplier 1.5 1.7
Screen
Display type Fixed Type Fixed Type
Display diagonal 3 inch 2.5 inch
Resolution of display 920k dots 230k dots
Selfie friendly
Liveview
Touch operation
Display technology TFT color LCD -
Viewfinder Information
Viewfinder type Electronic (optional) None
Features
Lowest shutter speed 180 secs 30 secs
Highest shutter speed 1/3200 secs 1/4000 secs
Continuous shooting rate 5.0 frames/s -
Shutter priority
Aperture priority
Manual mode
Exposure compensation Yes Yes
Set white balance
Image stabilization
Integrated flash
Flash options Auto, On, Off, Red-Eye, Slow Sync, Manual -
External flash
Auto exposure bracketing
White balance bracketing
Exposure
Multisegment metering
Average metering
Spot metering
Partial metering
AF area metering
Center weighted metering
Video features
Video resolutions 1280 x 720 (24 fps), 640 x 480 (24 fps), 320 x 240 (24 fps) -
Max video resolution 1280x720 None
Video file format MPEG-4 -
Mic port
Headphone port
Connectivity
Wireless None None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 1.0 (1.5 Mbit/sec)
GPS None None
Physical
Environmental sealing
Water proofing
Dust proofing
Shock proofing
Crush proofing
Freeze proofing
Weight 140g (0.31 lb) 270g (0.60 lb)
Physical dimensions 113 x 70 x 56mm (4.4" x 2.8" x 2.2") 113 x 60 x 50mm (4.4" x 2.4" x 2.0")
DXO scores
DXO All around 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 pictures -
Style of battery Battery Pack -
Battery ID 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/MMC card
Card slots Single Single
Price at launch $566 $566