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Epson R-D1 vs Pentax Q

The Epson R-D1 and the Pentax Q are two digital cameras that were revealed to the public, respectively, in March 2004 and June 2011. The R-D1 is a rangefinder-focusing mirrorless, while the Pentax Q is a mirrorless interchangeable lens camera. The cameras are based on an APS-C (R-D1) and a 1/2.3-inch (Pentax Q) sensor. The Epson has a resolution of 6 megapixels, whereas the Pentax provides 12 MP.

Below is an overview of the main specs of the two cameras as a starting point for the comparison.

Headline Specifications
Epson R-D1
versus
Pentax Q
Epson R-D1   Pentax Q
Rangefinder camera Mirrorless system camera
Leica M mount lenses Pentax Q mount lenses
6 MP – APS-C sensor 12 MP – 1/2.3" sensor
no Video 1080/30p Video
ISO 200-1,600 ISO 125-6,400
Optical viewfinder Viewfinder optional
2.0" LCD – 235k dots 3.0" LCD – 460k dots
Fixed screen (not touch-sensitive) Fixed screen (not touch-sensitive)
1 shutter flaps per second 1.5 shutter flaps per second
no shake reductionIn-body stabilization
142 x 89 x 40 mm, 620 g 98 x 57 x 31 mm, 180 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Epson R-D1 and the Pentax Q? Which one should you buy? Read on to find out how these two cameras compare with respect to their body size, their imaging sensors, their shooting features, their input-output connections, and their reception by expert reviewers.

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Body comparison

An illustration of the physical size and weight of the Epson R-D1 and the Pentax Q is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three consecutive perspectives from the front, the top, and the back are available. All size dimensions are rounded to the nearest millimeter.

The Pentax Q can be obtained in two different colors (black, white), while the R-D1 is only available in black.

Size Epson R-D1 vs Pentax Q
Compare R-D1 versus Pentax Q top
Comparison R-D1 or Pentax Q rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Pentax Q is considerably smaller (56 percent) than the Epson R-D1. Moreover, the Pentax Q is substantially lighter (71 percent) than the R-D1. In this context, it is worth noting that neither the R-D1 nor the Pentax Q are weather-sealed.

The above size and weight comparisons are to some extent incomplete since they do not consider the interchangeable lenses that both of these cameras require. Hence, you might want to study and compare the specifications of available lenses in order to get the full picture of the size and weight of the two camera systems.

The following table provides a synthesis of the main physical specifications of the two cameras and other similar ones. If you want to switch the focus of the display and review another camera pair, you can move across to the CAM-parator tool and choose from the broad selection of possible camera comparisons there.

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Body Specifications
# image Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Epson R-D1 142 mm 89 mm 40 mm 620 g .. n Mar 2004 2,999ebay.com
2.
 
Pentax Q 98 mm 57 mm 31 mm 180 g 230 n Jun 2011 649ebay.com
3.
 
Canon Rebel 142 mm 99 mm 72 mm 649 g 400 n Aug 2003 899ebay.com
4.
 
Leica CL 131 mm 78 mm 45 mm 403 g 220 n Nov 2017 2,795ebay.com
5.
 
Leica M10 139 mm 80 mm 39 mm 660 g 210 Y Jan 2017 6,595ebay.com
6.
 
Leica X-U Typ 113 140 mm 79 mm 88 mm 635 g 450 Y Jan 2016 2,950ebay.com
7.
 
Leica X Vario 133 mm 73 mm 95 mm 680 g 450 n Jun 2013 2,850ebay.com
8.
 
Leica M9 139 mm 80 mm 37 mm 585 g 550 n Sep 2009 7,999ebay.com
9.
 
Nikon D40 124 mm 94 mm 64 mm 522 g 470 n Nov 2006 499ebay.com
10.
 
Nikon D50 133 mm 102 mm 76 mm 620 g 400 n Apr 2005 749ebay.com
11.
 
Nikon D70s 140 mm 111 mm 78 mm 679 g 500 n Apr 2005 899ebay.com
12.
 
Nikon D70 140 mm 111 mm 78 mm 679 g 400 n Jan 2004 999ebay.com
13.
 
Olympus XZ-2 113 mm 65 mm 48 mm 346 g 340 n Sep 2012 599ebay.com
14.
 
Olympus E-PL2 114 mm 72 mm 42 mm 362 g 280 n Jan 2011 599ebay.com
15.
 
Olympus E-PL3 110 mm 64 mm 37 mm 313 g 300 n Jun 2011 599ebay.com
16.
 
Olympus E-PL1 115 mm 72 mm 42 mm 334 g 290 n Feb 2010 599ebay.com
17.
 
Olympus E-620 130 mm 94 mm 60 mm 521 g 500 n Feb 2009 699ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
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Any camera decision will naturally be influenced heavily by the price. The manufacturer’s suggested retail prices give an idea on the placement of the camera in the maker’s lineup and the broader market. The Pentax Q was launched at a markedly lower price (by 78 percent) than the R-D1, which puts it into a different market segment. Usually, retail prices stay at first close to the launch price, but after several months, discounts become available. Later in the product cycle and, in particular, when the replacement model is about to appear, further discounting and stock clearance sales often push the camera price considerably down. Then, after the new model is out, very good deals can frequently be found on the pre-owned market.

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will generally have larger individual pixels that offer better low-light sensitivity, provide wider dynamic range, and have richer color-depth than smaller pixels in a sensor of the same technological generation. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Of the two cameras under consideration, the Epson R-D1 features an APS-C sensor and the Pentax Q a 1/2.3-inch sensor. The sensor area in the Pentax Q is 92 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 5.6. The sensor in the R-D1 has a native 3:2 aspect ratio, while the one in the Pentax Q offers a 4:3 aspect.

Epson R-D1 and Pentax Q sensor measures

Despite having a smaller sensor, the Pentax Q offers a higher resolution of 12 megapixels, compared with 6 MP of the R-D1. This megapixels advantage comes at the cost of a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 1.53μm versus 7.85μm for the R-D1). However, it should be noted that the Pentax Q is much more recent (by 7 years and 3 months) than the R-D1, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently.

The resolution advantage of the Pentax Q implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the Pentax Q for good quality output (200 dots per inch) amounts to 20 x 15 inches or 50.8 x 38.1 cm, for very good quality (250 dpi) 16 x 12 inches or 40.6 x 30.5 cm, and for excellent quality (300 dpi) 13.3 x 10 inches or 33.9 x 25.4 cm. The corresponding values for the Epson R-D1 are 15 x 10 inches or 38.2 x 25.4 cm for good quality, 12 x 8 inches or 30.6 x 20.3 cm for very good quality, and 10 x 6.7 inches or 25.5 x 16.9 cm for excellent quality prints.

The Epson R-D1 has a native sensitivity range from ISO 200 to ISO 1600. The corresponding ISO settings for the Pentax Q are ISO 125 to ISO 6400 (no boost).

In terms of underlying technology, the R-D1 is build around a CCD sensor, while the Pentax Q uses a CMOS imager. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

R-D1 versus Pentax Q MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. This service assesses and scores the color depth ("DXO Portrait"), dynamic range ("DXO Landscape"), and low-light sensitivity ("DXO Sports") of camera sensors, and also publishes an overall camera score. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

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Sensor Characteristics
# image Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Epson R-D1 APS-C 6.0 3008 2000none21.110.456455
2.
 
Pentax Q 1/2.3 12.0 4000 30001080/30p20.211.118947
3.
 
Canon Rebel APS-C 6.3 3072 2048none21.010.854455
4.
 
Leica CL APS-C 24.1 6014 40144K/30p24.013.3178882
5.
 
Leica M10 Full Frame 23.8 5952 3992none24.413.2213386
6.
 
Leica X-U Typ 113 APS-C 16.1 4928 32641080/30p23.813.0161480
7.
 
Leica X Vario APS-C 16.1 4928 32721080/30p23.412.7132078
8.
 
Leica M9 Full Frame 18.1 5212 3472none22.511.788469
9.
 
Nikon D40 APS-C 6.0 3008 2000none21.011.056156
10.
 
Nikon D50 APS-C 6.0 3008 2000none20.910.856055
11.
 
Nikon D70s APS-C 6.0 3008 2000none20.410.352950
12.
 
Nikon D70 APS-C 6.0 3008 2000none20.410.352950
13.
 
Olympus XZ-2 1/1.7 11.8 3968 29761080/30p20.411.321649
14.
 
Olympus E-PL2 Four Thirds 12.2 4032 3024720/30p21.410.257355
15.
 
Olympus E-PL3 Four Thirds 12.2 4032 30241080/60i20.910.349952
16.
 
Olympus E-PL1 Four Thirds 12.2 4032 3024720/30p21.510.148754
17.
 
Olympus E-620 Four Thirds 12.2 4032 3024none21.310.353655
Note: DXO values in italics represent estimates based on sensor size and age.
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Many modern cameras are not only capable of taking still images, but can also record movies. The Pentax Q indeed provides for movie recording, while the R-D1 does not. The highest resolution format that the Pentax Q can use is 1080/30p.

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Feature comparison

Beyond body and sensor, cameras can and do differ across a range of features. For example, the R-D1 has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the Pentax Q relies on live view and the rear LCD for framing. That said, the Pentax Q can be equipped with an optional viewfinder – the O-VF1. The table below summarizes some of the other core capabilities of the Epson R-D1 and Pentax Q in connection with corresponding information for a sample of similar cameras.

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Core Features
# image Camera
Model
Viewfinder
(Type or
000 dots)
Control
Panel
(yes/no)
LCD
Specifications
(inch/000 dots)
LCD
Attach-
ment
Touch
Screen
(yes/no)
Max
Shutter
Speed *
Max
Shutter
Flaps *
Built-in
Flash
(yes/no)
Built-in
Image
Stab
1.
 
Epson R-D1optical n2.0 / 235 fixed n 1/2000s 1.0/s n n
2.
 
Pentax Qoptional n3.0 / 460 fixed n 1/2000s 1.5/s Y Y
3.
 
Canon Rebeloptical n1.8 / 118 fixed n 1/4000s 2.5/s Y n
4.
 
Leica CL2360 Y3.0 / 1040 fixed Y 1/8000s 10.0/s n n
5.
 
Leica M10optical n3.0 / 1037 fixed n 1/4000s 5.0/s n n
6.
 
Leica X-U Typ 113optional n3.0 / 920 fixed n 1/2000s 5.0/s Y n
7.
 
Leica X Variooptional n3.0 / 920 fixed n 1/2000s 5.0/s Y n
8.
 
Leica M9optical n2.5 / 230 fixed n 1/4000s 2.0/s n n
9.
 
Nikon D40optical n2.5 / 230 fixed n 1/4000s 2.5/s Y n
10.
 
Nikon D50optical n2.0 / 130 fixed n 1/4000s 2.5/s Y n
11.
 
Nikon D70soptical n2.0 / 130 fixed n 1/8000s 3.0/s Y n
12.
 
Nikon D70optical n1.8 / 130 fixed n 1/8000s 3.0/s Y n
13.
 
Olympus XZ-2optional n3.0 / 920 tilting Y 1/2000s 5.0/s Y Y
14.
 
Olympus E-PL2optional n3.0 / 460 fixed n 1/4000s 3.0/s Y Y
15.
 
Olympus E-PL3optional n3.0 / 460 tilting n 1/4000s 5.5/s n Y
16.
 
Olympus E-PL1optional n2.7 / 230 fixed n 1/2000s 3.0/s Y Y
17.
 
Olympus E-620optical n2.7 / 230 swivel n 1/4000s 4.0/s Y Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.
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One difference between the cameras concerns the presence of an on-board flash. The Pentax Q has one, while the R-D1 does not. While the built-in flash of the Pentax Q is not very powerful, it can at times be useful as a fill-in light.

The Pentax Q has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

The R-D1 writes its imaging data to SDHC cards, while the Pentax Q uses SDXC cards.

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Connectivity comparison

For some imaging applications, the extent to which a camera can communicate with its environment can be an important aspect in the camera decision process. The table below provides an overview of the connectivity of the Epson R-D1 and Pentax Q and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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Input-Output Connections
# image Camera
Model
Hotshoe
Port
Internal
Mic / Speaker
Microphone
Port
Headphone
Port
HDMI
Port
USB
Port
WiFi
Support
NFC
Support
Bluetooth
Support
1.
 
Epson R-D1Y- / --------
2.
 
Pentax QYmono / mono--mini2.0---
3.
 
Canon RebelY- / ----1.1---
4.
 
Leica CLYstereo / mono----Y--
5.
 
Leica M10Y- / -----Y--
6.
 
Leica X-U Typ 113Ystereo / mono---2.0---
7.
 
Leica X VarioYstereo / mono--mini2.0---
8.
 
Leica M9Y- / ----2.0---
9.
 
Nikon D40Y- / ----2.0---
10.
 
Nikon D50Y- / ----2.0---
11.
 
Nikon D70sY- / ----2.0---
12.
 
Nikon D70Y- / ----1.0---
13.
 
Olympus XZ-2Ystereo / mono--mini2.0---
14.
 
Olympus E-PL2Ystereo / ---mini2.0---
15.
 
Olympus E-PL3Ystereo / ---mini2.0---
16.
 
Olympus E-PL1Ystereo / ---mini2.0---
17.
 
Olympus E-620Y- / ----2.0---
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Studio photographers will appreciate that the Epson R-D1 (unlike the Pentax Q) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the R-D1 and the Pentax Q have been discontinued, but can regularly be found used on ebay. The Pentax Q was replaced by the Pentax Q10, while the R-D1 does not have a direct successor. Further information on the features and operation of the R-D1 and Pentax Q can be found, respectively, in the Epson R-D1 Manual (free pdf) or the online Pentax Q Manual.

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Review summary

So how do things add up? Is there a clear favorite between the Epson R-D1 and the Pentax Q? Which camera is better? A synthesis of the relative strong points of each of the models is listed below.

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Advantages of the Epson R-D1:

  • Better image quality: Features bigger pixels on a larger sensor for higher quality imaging.
  • Richer colors: The pixel size advantage translates into images with better, more accurate colors.
  • More dynamic range: Larger pixels capture a wider spectrum of light and dark details.
  • Better low-light sensitivity: Larger pixels means good image quality even under poor lighting.
  • Easier framing: Has an optical viewfinder for image composition and settings control.
  • Better studio light control: Has a PC Sync socket to connect to professional strobe lights.
  • More heavily discounted: Has been available for much longer (launched in March 2004).

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Reasons to prefer the Pentax Q:

  • More detail: Has more megapixels (12 vs 6MP), which boosts linear resolution by 38%.
  • Broader imaging potential: Can capture not only stills but also 1080/30p video.
  • Larger screen: Has a bigger rear LCD (3.0" vs 2.0") for image review and settings control.
  • More detailed LCD: Has a higher resolution rear screen (460k vs 235k dots).
  • Faster burst: Shoots at higher frequency (1.5 vs 1 flaps/sec) to capture the decisive moment.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • More compact: Is smaller (98x57mm vs 142x89mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 440g or 71 percent) and is thus easier to take along.
  • Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
  • Easier fill-in: Has a small integrated flash to brighten shadows of backlit subjects.
  • More affordable: Was introduced into a lower priced category (78 percent cheaper at launch).
  • More modern: Reflects 7 years and 3 months of technical progress since the R-D1 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the Pentax Q is the clear winner of the contest (12 : 7 points). However, the relative importance of the various individual camera aspects will vary according to personal preferences and needs, so that you might like to apply corresponding weights to the particular features before making a decision on a new camera. A professional wildlife photographer will view the differences between cameras in a way that diverges from the perspective of a family photog, and a person interested in architecture has distinct needs from a sports shooter. Hence, the decision which camera is best and worth buying is often a very personal one.

R-D1 07:12 Pentax Q

In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it says little about, for example, the shooting experience and imaging performance of the R-D1 and the Pentax Q in practical situations. User reviews, such as those found at amazon, can sometimes inform about these issues, but such feedback is often incomplete, inconsistent, and biased.

Expert reviews

This is where reviews by experts come in. The following table reports the overall ratings of the cameras as published by some of the major camera review sites (amateurphotographer [AP], cameralabs [CL], digitalcameraworld [DCW], dpreview [DPR], ephotozine [EPZ], photographyblog [PB]). As can be seen, the professional reviewers agree in many cases on the quality of different cameras, but sometimes their assessments diverge, reinforcing the earlier point that a camera decision is often a very personal choice.

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Expert Camera Reviews
# image  Camera 
 Model 
 AP 
 score 
 CL 
 score 
 DCW 
 score 
 DPR 
 score 
 EPZ 
 score 
 PB 
 score 
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Epson R-D1............ Mar 2004 2,999ebay.com
2.
 
Pentax Q3/5......4/53.5/5 Jun 2011 649ebay.com
3.
 
Canon Rebel......+ +.... Aug 2003 899ebay.com
4.
 
Leica CL....4.2/5....4/5 Nov 2017 2,795ebay.com
5.
 
Leica M104.5/5......4/54.5/5 Jan 2017 6,595ebay.com
6.
 
Leica X-U Typ 1133.5/5........3.5/5 Jan 2016 2,950ebay.com
7.
 
Leica X Vario3/5......4/54/5 Jun 2013 2,850ebay.com
8.
 
Leica M9........4.5/5.. Sep 2009 7,999ebay.com
9.
 
Nikon D40..81/100..+ +o4.5/5 Nov 2006 499ebay.com
10.
 
Nikon D50..78/100..+ +4/54.5/5 Apr 2005 749ebay.com
11.
 
Nikon D70s..........5/5 Apr 2005 899ebay.com
12.
 
Nikon D70......+ +.... Jan 2004 999ebay.com
13.
 
Olympus XZ-24/5+....4.5/54.5/5 Sep 2012 599ebay.com
14.
 
Olympus E-PL23/583/100..71/1004.5/54.5/5 Jan 2011 599ebay.com
15.
 
Olympus E-PL33/5+ +..72/1004.5/54/5 Jun 2011 599ebay.com
16.
 
Olympus E-PL1..86/100..69/1004/54.5/5 Feb 2010 599ebay.com
17.
 
Olympus E-6203/588/100..72/1004.5/55/5 Feb 2009 699ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.
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The above review scores should be interpreted with care, though. The assessments were made in relation to similar cameras of the same technological generation. Thus, a score needs to be put into the context of the launch date and the launch price of the camera, and comparisons of ratings among very different cameras or across long time periods have little meaning. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.

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Other camera comparisons

Did this review help to inform your camera decision process? In case you would like to check on the differences and similarities of other camera models, just make your choice using the following search menu. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.

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    Specifications: Epson R-D1 vs Pentax Q

    Below is a side-by-side comparison of the specs of the two cameras to facilitate a quick review of their differences and common features.

    Camera Specifications
    Camera Model Epson R-D1 Pentax Q
    Camera Type Rangefinder camera Mirrorless system camera
    Camera Lens Leica M mount lenses Pentax Q mount lenses
    Launch Date March 2004 June 2011
    Launch Price USD 2,999 USD 649
    Sensor Specs Epson R-D1 Pentax Q
    Sensor Technology CCD CMOS
    Sensor Format APS-C Sensor 1/2.3" Sensor
    Sensor Size 23.7 x 15.6 mm 6.17 x 4.55 mm
    Sensor Area 369.72 mm2 28.0735 mm2
    Sensor Diagonal 28.4 mm 7.7 mm
    Crop Factor 1.5x 5.6x
    Sensor Resolution 6 Megapixels 12 Megapixels
    Image Resolution 3008 x 2000 pixels 4000 x 3000 pixels
    Pixel Pitch 7.85 μm 1.53 μm
    Pixel Density 1.63 MP/cm2 42.74 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability no Video 1080/30p Video
    ISO Setting 200 - 1,600 ISO 125 - 6,400 ISO
    DXO Sensor Quality (score) .. 47
    DXO Color Depth (bits) .. 20.2
    DXO Dynamic Range (EV) .. 11.1
    DXO Low Light (ISO) .. 189
    Screen Specs Epson R-D1 Pentax Q
    Viewfinder Type Optical viewfinder Viewfinder optional
    Viewfinder Field of View 100%
    LCD Framing Live View
    Rear LCD Size 2.0inch 3.0inch
    LCD Resolution 235k dots 460k dots
    LCD Attachment Fixed screen Fixed screen
    Shooting Specs Epson R-D1 Pentax Q
    Focus System Manual Focus Contrast-detect AF
    Continuous Shooting 1 shutter flaps/s 1.5 shutter flaps/s
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Image Stabilizationno shake reductionIn-body stabilization
    Fill Flash no On-Board Flash Built-in Flash
    Storage Medium SDHC cards SDXC cards
    Single or Dual Card Slots Single card slot Single card slot
    UHS card support no no
    Connectivity Specs Epson R-D1 Pentax Q
    External Flash Hotshoe Hotshoe
    Studio Flash PC Sync socket no PC Sync
    USB Connector no USB USB 2.0
    HDMI Port no HDMI mini HDMI
    Wifi Support no Wifi no Wifi
    Body Specs Epson R-D1 Pentax Q
    Battery Type Epson EU-85 Pentax D-LI68
    Body Dimensions 142 x 89 x 40 mm
    (5.6 x 3.5 x 1.6 in)
    98 x 57 x 31 mm
    (3.9 x 2.2 x 1.2 in)
    Camera Weight 620 g (21.9 oz) 180 g (6.3 oz)
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