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Pentax 645D vs Pentax RS1500

Portability
50
Imaging
76
Features
52
Overall
66
Pentax 645D front
 
Pentax Optio RS1500 front
Portability
93
Imaging
37
Features
30
Overall
34

Pentax 645D vs Pentax RS1500 Key Specs

Pentax 645D
(Full Review)
  • 40MP - Medium format Sensor
  • 3" Fixed Display
  • ISO 200 - 1600
  • No Anti-Alias Filter
  • No Video
  • Pentax 645AF2 Mount
  • 1480g - 156 x 117 x 119mm
  • Introduced March 2010
  • New Model is Pentax 645Z
Pentax RS1500
(Full Review)
  • 14MP - 1/2.3" Sensor
  • 2.7" Fixed Display
  • ISO 80 - 6400
  • 1280 x 720 video
  • 28-110mm (F3.5-5.5) lens
  • 157g - 114 x 58 x 28mm
  • Introduced March 2011
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Pentax 645D vs Pentax RS1500 Overview

The following is a complete comparison of the Pentax 645D and Pentax RS1500, former is a Pro DSLR while the other is a Small Sensor Compact and both are created by Pentax. There is a substantial difference between the image resolutions of the 645D (40MP) and RS1500 (14MP) and the 645D (Medium format) and RS1500 (1/2.3") posses different sensor sizing.

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The 645D was revealed 12 months prior to the RS1500 and they are of a similar age. Each of the cameras have different body design with the Pentax 645D being a Large SLR camera and the Pentax RS1500 being a Compact camera.

Before going straight to a in depth comparison, here is a simple highlight of how the 645D matches up vs the RS1500 in relation to portability, imaging, features and an overall mark.

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Reasons to pick Pentax 645D over the Pentax RS1500

 645D RS1500 
Display dimensions3"2.7"Larger display (+0.3")
Display resolution921k230kClearer display (+691k dot)

Reasons to pick Pentax RS1500 over the Pentax 645D

 RS1500 645D 
IntroducedMarch 2011March 2010Newer by 12 months

Common features in the Pentax 645D and Pentax RS1500

 645D RS1500 
Focus manually Dial exact focus
Display typeFixed Fixed Fixed display
Selfie screen Neither provides selfie screen
Touch friendly display Neither provides Touch friendly display

Pentax 645D vs Pentax RS1500 Physical Comparison

If you are going to travel with your camera often, you have to think about its weight and proportions. The Pentax 645D provides physical dimensions of 156mm x 117mm x 119mm (6.1" x 4.6" x 4.7") with a weight of 1480 grams (3.26 lbs) while the Pentax RS1500 has measurements of 114mm x 58mm x 28mm (4.5" x 2.3" x 1.1") having a weight of 157 grams (0.35 lbs).

Take a look at the Pentax 645D and Pentax RS1500 in our completely new Camera plus Lens Size Comparison Tool. Camera Size Comparison with Lenses

Keep in mind, the weight of an ILC will change depending on the lens you choose during that time. Underneath is a front view sizing comparison of the 645D versus the RS1500.

Pentax 645D vs Pentax RS1500 size comparison

Considering size and weight, the portability grade of the 645D and RS1500 is 50 and 93 respectively.

Pentax 645D vs Pentax RS1500 top view buttons comparison

Pentax 645D vs Pentax RS1500 Sensor Comparison

Usually, its difficult to picture the contrast between sensor dimensions purely by reading through a spec sheet. The pic underneath should provide you a greater sense of the sensor dimensions in the 645D and RS1500.

As you can see, each of these cameras have different megapixels and different sensor dimensions. The 645D using its larger sensor is going to make getting shallow DOF simpler and the Pentax 645D will give you greater detail because of its extra 26 Megapixels. Greater resolution will make it easier to crop pics a bit more aggressively. The more aged 645D is going to be behind in sensor technology.

Pentax 645D vs Pentax RS1500 sensor size comparison

Pentax 645D vs Pentax RS1500 Screen and ViewFinder

Pentax 645D vs Pentax RS1500 Screen and Viewfinder comparison
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Photography Type Scores

Portrait Comparison

Pentax 645D Portrait photography information
Pentax RS1500 Portrait photography information
77
manual focus
great megapixels (40MP)
great sensor size (Medium format)
saves RAW formats
does not have liveview
35
you can focus manually
MP count good (14MP)
manual exposure not possible
cannot use external flash
very small sensor size (1/2.3")
does not have RAW support
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Street Comparison

Pentax 645D Street photography features
Pentax RS1500 Street photography features
58
great sensor size (Medium format)
saves RAW formats
weather proofing
screen does not articulate
no image stabilization
54
environment sealing
screen is fixed
no image stabilization
very small sensor size (1/2.3")
does not have RAW support
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Sports Comparison

Sports photography with Pentax 645D
Sports photography with Pentax RS1500
63
great megapixels (40 megapixels)
great sensor size (Medium format)
weather proofing
comes with phase detect AF
does not have liveview
painfully slow continuous shooting (1.0 frames/s)
no image stabilization
bad battery (800 CIPA)
37
MP count good (14MP)
provides tracking focus
environment sealing
continuous shooting slow (1.0 fps)
no shutter priority
no image stabilization
very small sensor size (1/2.3")
does not have phase detect autofocus
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Travel Comparison

Pentax 645D Travel photography advice
Pentax RS1500 Travel photography advice
55
weather proofing
great megapixels (40MP)
bad battery (800 per charge)
display is not selfie friendly
67
environment sealing
MP count good (14MP)
has built in flash
decently wide (28mm)
doesn't have Timelapse recording
display isn't selfie friendly
sluggish maximum aperture (f3.5)
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Landscape Comparison

Pentax 645D Landscape photography factors
Pentax RS1500 Landscape photography factors
72
manual focus
interchangeable lenses (Pentax 645AF2 mount)
screen is a good size (3")
great megapixels (40 megapixels)
great sensor size (Medium format)
doesnt have low pass filter
saves RAW formats
weather proofing
has double storage slots
does not have liveview
no image stabilization
bad battery (800 per charge)
40
you can focus manually
decently wide (28mm)
MP count good (14MP)
environment sealing
cannot swap lens (fixed lens mount)
sluggish maximum aperture (f3.5)
small screen (2.7")
manual exposure not possible
no image stabilization
very small sensor size (1/2.3")
does not have RAW support
doesn't have Timelapse recording
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Vlogging Comparison

Pentax 645D as a Vlogging camera
Pentax RS1500 as a Vlogging camera
9
can't shoot video
25
decently wide (28mm)
sluggish maximum aperture (f3.5)
display isn't selfie friendly
no image stabilization
low res video (1280 x 720 pxls)
doesn't have microphone jack
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Pentax 645D vs Pentax RS1500 Specifications

Detailed spec comparison table for Pentax 645D and Pentax RS1500
 Pentax 645DPentax Optio RS1500
General Information
Company Pentax Pentax
Model Pentax 645D Pentax Optio RS1500
Class Pro DSLR Small Sensor Compact
Introduced 2010-03-10 2011-03-16
Body design Large SLR Compact
Sensor Information
Processor Prime II -
Sensor type CCD CCD
Sensor size Medium format 1/2.3"
Sensor measurements 44 x 33mm 6.17 x 4.55mm
Sensor surface area 1,452.0mm² 28.1mm²
Sensor resolution 40MP 14MP
Anti aliasing filter
Aspect ratio 4:3 4:3, 3:2 and 16:9
Peak resolution 7264 x 5440 4288 x 3216
Highest native ISO 1600 6400
Lowest native ISO 200 80
RAW pictures
Lowest enhanced ISO 100 -
Autofocusing
Focus manually
Touch to focus
Continuous autofocus
Single autofocus
Autofocus tracking
Autofocus selectice
Autofocus center weighted
Autofocus multi area
Live view autofocus
Face detect focus
Contract detect focus
Phase detect focus
Number of focus points 11 9
Lens
Lens mounting type Pentax 645AF2 fixed lens
Lens focal range - 28-110mm (3.9x)
Maximal aperture - f/3.5-5.5
Macro focus distance - 1cm
Available lenses 6 -
Focal length multiplier 0.8 5.8
Screen
Range of display Fixed Type Fixed Type
Display sizing 3" 2.7"
Resolution of display 921k dot 230k dot
Selfie friendly
Liveview
Touch display
Display tech TFT Color LCD with wide-viewing angle and with AR coating TFT color LCD with Anti-reflective coating
Viewfinder Information
Viewfinder type Optical (pentaprism) None
Viewfinder coverage 98 percent -
Viewfinder magnification 0.85x -
Features
Minimum shutter speed 30 secs 4 secs
Fastest shutter speed 1/4000 secs 1/1500 secs
Continuous shutter speed 1.0fps 1.0fps
Shutter priority
Aperture priority
Manual exposure
Exposure compensation Yes -
Custom white balance
Image stabilization
Built-in flash
Flash range no built-in flash 3.90 m
Flash options Auto, On, Off, Red-eye, Slow Sync, Rear Curtain Auto, On, Off, Red-eye, Soft
External flash
AE bracketing
White balance bracketing
Fastest flash sync 1/125 secs -
Exposure
Multisegment
Average
Spot
Partial
AF area
Center weighted
Video features
Supported video resolutions - 1280 x 720 (30, 15 fps), 640 x 480 (30, 15 fps), 320 x 240 (30, 15 fps)
Highest video resolution None 1280x720
Video format - Motion JPEG
Microphone input
Headphone input
Connectivity
Wireless None None
Bluetooth
NFC
HDMI
USB USB 2.0 (480 Mbit/sec) USB 2.0 (480 Mbit/sec)
GPS None None
Physical
Environmental seal
Water proof
Dust proof
Shock proof
Crush proof
Freeze proof
Weight 1480 grams (3.26 lb) 157 grams (0.35 lb)
Physical dimensions 156 x 117 x 119mm (6.1" x 4.6" x 4.7") 114 x 58 x 28mm (4.5" x 2.3" x 1.1")
DXO scores
DXO Overall score 82 not tested
DXO Color Depth score 24.6 not tested
DXO Dynamic range score 12.6 not tested
DXO Low light score 1262 not tested
Other
Battery life 800 images 260 images
Battery format Battery Pack Battery Pack
Battery model D-LI90 D-LI92
Self timer Yes (2 or 10 sec) Yes (2 or 10 sec)
Time lapse feature
Storage media SD/SDHC SD/SDHC/SDXC, Internal
Storage slots Two Single
Price at release $4,000 $150