Epson R-D1 vs Sony A77 II
The Epson R-D1 and the Sony Alpha SLT-A77 II are two enthusiast cameras that were revealed to the public, respectively, in March 2004 and May 2014. The R-D1 is a rangefinder-focusing mirrorless camera, while the A77 II is a DSLR. Both cameras are equipped with an APS-C sensor. The Epson has a resolution of 6 megapixels, whereas the Sony provides 24 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
Going beyond this snapshot of core features and characteristics, what are the differences between the Epson R-D1 and the Sony Alpha SLT-A77 II? 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.
An illustration of the physical size and weight of the Epson R-D1 and the Sony A77 II is provided in the side-by-side display below. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All width, height and depth measures are rounded to the nearest millimeter.
If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Sony A77 II is notably larger (18 percent) than the Epson R-D1. Moreover, the A77 II is slightly heavier (4 percent) than the R-D1. It is noteworthy in this context that the A77 II is splash and dust-proof, while the R-D1 does not feature any corresponding weather-sealing.
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.
|1.||Epson R-D1||142 mm||89 mm||40 mm||620 g||..||n||Mar 2004||2,999|
|2.||Sony A77 II||143 mm||104 mm||81 mm||647 g||480||Y||May 2014||1,199|
|3.||Canon Rebel||142 mm||99 mm||72 mm||649 g||400||n||Aug 2003||899|
|4.||Leica CL||131 mm||78 mm||45 mm||403 g||220||n||Nov 2017||2,795|
|5.||Leica M10||139 mm||80 mm||39 mm||660 g||210||Y||Jan 2017||6,595|
|6.||Leica X-U Typ 113||140 mm||79 mm||88 mm||635 g||450||Y||Jan 2016||2,950|
|7.||Leica X Vario||133 mm||73 mm||95 mm||680 g||450||n||Jun 2013||2,850|
|8.||Leica M9||139 mm||80 mm||37 mm||585 g||..||n||Sep 2009||7,999|
|9.||Nikon D7200||136 mm||107 mm||76 mm||765 g||1110||Y||Mar 2015||1,199|
|10.||Nikon D7100||136 mm||107 mm||76 mm||765 g||950||Y||Feb 2013||1,199|
|11.||Nikon D40||124 mm||94 mm||64 mm||522 g||470||n||Nov 2006||499|
|12.||Nikon D50||133 mm||102 mm||76 mm||620 g||400||n||Apr 2005||749|
|13.||Nikon D70s||140 mm||111 mm||78 mm||679 g||500||n||Apr 2005||899|
|14.||Nikon D70||140 mm||111 mm||78 mm||679 g||400||n||Jan 2004||999|
|15.||Sony A68||143 mm||104 mm||81 mm||610 g||540||n||Nov 2015||699|
|16.||Sony A7 II||127 mm||96 mm||60 mm||599 g||350||Y||Nov 2014||1,999|
|17.||Sony A77||143 mm||104 mm||81 mm||732 g||470||Y||Aug 2011||1,399|
|Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.|
The price is, of course, an important factor in any camera decision. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The A77 II was launched at a markedly lower price (by 60 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.
The size of the imaging sensor is a crucial determinant of image quality. All other things equal, a large sensor will have larger individual pixel-units that offer better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixels in a sensor of the same technological generation. Furthermore, a large sensor camera will give the photographer more possibilities to use shallow depth-of-field in order to isolate a subject from the background. On the downside, larger sensors tend to be more expensive and lead to bigger and heavier cameras and lenses.
Both cameras under consideration feature an APS-C sensor, but their sensors differ slightly in size. The sensor area in the A77 II is 1 percent smaller. They nevertheless have the same format factor of 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
Despite having a slightly smaller sensor, the A77 II offers a higher resolution of 24 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 3.91μm versus 7.85μm for the R-D1). However, it should be noted that the A77 II is much more recent (by 10 years and 1 month) 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 Sony A77 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A77 II for good quality output (200 dots per inch) amounts to 30 x 20 inches or 76.2 x 50.8 cm, for very good quality (250 dpi) 24 x 16 inches or 61 x 40.6 cm, and for excellent quality (300 dpi) 20 x 13.3 inches or 50.8 x 33.9 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 Sony Alpha SLT-A77 II are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-51200.
Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service is based on lab testing and assigns an overall score to each camera sensor, as well as ratings for dynamic range ("DXO Landscape"), color depth ("DXO Portrait"), and low-light sensitivity ("DXO Sports"). The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
|2.||Sony A77 II||APS-C||24.0||6000||4000||1080/60p||23.5||12.7||1442||77|
|5.||Leica M10||Full Frame||23.8||5952||3992||none||24.4||13.2||2133||86|
|6.||Leica X-U Typ 113||APS-C||16.1||4928||3264||1080/30p||23.8||13.0||1614||80|
|7.||Leica X Vario||APS-C||16.1||4928||3272||1080/30p||23.4||12.7||1320||78|
|8.||Leica M9||Full Frame||18.1||5212||3472||none||22.5||11.7||884||69|
|16.||Sony A7 II||Full Frame||24.0||6000||4000||1080/60p||24.9||13.6||2449||90|
|Note: DXO values in italics represent estimates based on sensor size and age.|
Many modern cameras cannot only take still pictures, but also record videos. The A77 II indeed provides for movie recording, while the R-D1 does not. The highest resolution format that the A77 II can use is 1080/60p.
Beyond body and sensor, cameras can and do differ across a range of features. For example, the A77 II has an electronic viewfinder (2359k dots), while the R-D1 has an optical one. Both systems have their advantages, with the electronic viewfinder making it possible to project supplementary shooting information into the framing view, whereas the optical viewfinder offers lag-free viewing and a very clear framing image. The table below summarizes some of the other core capabilities of the Epson R-D1 and Sony A77 II in connection with corresponding information for a sample of similar cameras.
|1.||Epson R-D1||optical||n||2.0 / 235||fixed||n||1/2000s||1.0/s||n||n|
|2.||Sony A77 II||2359||Y||3.0 / 1229||full-flex||n||1/8000s||12.0/s||Y||Y|
|3.||Canon Rebel||optical||n||1.8 / 118||fixed||n||1/4000s||2.5/s||Y||n|
|4.||Leica CL||2360||Y||3.0 / 1040||fixed||Y||1/8000s||10.0/s||n||n|
|5.||Leica M10||optical||n||3.0 / 1037||fixed||n||1/4000s||5.0/s||n||n|
|6.||Leica X-U Typ 113||optional||n||3.0 / 920||fixed||n||1/2000s||5.0/s||Y||n|
|7.||Leica X Vario||optional||n||3.0 / 920||fixed||n||1/2000s||5.0/s||Y||n|
|8.||Leica M9||optical||n||2.5 / 230||fixed||n||1/4000s||2.0/s||n||n|
|9.||Nikon D7200||optical||Y||3.2 / 1229||fixed||n||1/8000s||6.0/s||Y||n|
|10.||Nikon D7100||optical||Y||3.2 / 1229||fixed||n||1/8000s||6.0/s||Y||n|
|11.||Nikon D40||optical||n||2.5 / 230||fixed||n||1/4000s||2.5/s||Y||n|
|12.||Nikon D50||optical||n||2.0 / 130||fixed||n||1/4000s||2.5/s||Y||n|
|13.||Nikon D70s||optical||n||2.0 / 130||fixed||n||1/8000s||3.0/s||Y||n|
|14.||Nikon D70||optical||n||1.8 / 130||fixed||n||1/8000s||3.0/s||Y||n|
|15.||Sony A68||1440||Y||2.7 / 460||tilting||n||1/4000s||8.0/s||Y||Y|
|16.||Sony A7 II||2400||n||3.0 / 1230||tilting||n||1/8000s||5.0/s||n||Y|
|17.||Sony A77||2359||Y||3.0 / 921||full-flex||n||1/8000s||12.0/s||Y||Y|
|Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.|
One feature that is present on the A77 II, but is missing on the R-D1 is a top-level LCD. While being, of course, smaller than the rear screen, the control panel conveys some of the essential shooting information and can be convenient for quick and easy settings verification.The A77 II has an articulated screen that can be turned to be front-facing. This characteristic will be appreciated by vloggers and photographers who are interested in taking selfies. In contrast, the R-D1 does not have a selfie-screen.
The R-D1 writes its imaging data to SDHC cards, while the A77 II uses SDXC or Memory Stick PRO Duo cards. The A77 II supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the R-D1 cannot take advantage of Ultra High Speed SD cards.
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 Sony Alpha SLT-A77 II and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
Mic / Speaker
|1.||Epson R-D1||Y||- / -||-||-||-||-||-||-||-|
|2.||Sony A77 II||Y||stereo / mono||Y||-||mini||2.0||Y||Y||-|
|3.||Canon Rebel||Y||- / -||-||-||-||1.1||-||-||-|
|4.||Leica CL||Y||stereo / mono||-||-||-||-||Y||-||-|
|5.||Leica M10||Y||- / -||-||-||-||-||Y||-||-|
|6.||Leica X-U Typ 113||Y||stereo / mono||-||-||-||2.0||-||-||-|
|7.||Leica X Vario||Y||stereo / mono||-||-||mini||2.0||-||-||-|
|8.||Leica M9||Y||- / -||-||-||-||2.0||-||-||-|
|9.||Nikon D7200||Y||stereo / mono||Y||Y||mini||2.0||Y||Y||-|
|10.||Nikon D7100||Y||stereo / mono||Y||Y||mini||2.0||-||-||-|
|11.||Nikon D40||Y||- / -||-||-||-||2.0||-||-||-|
|12.||Nikon D50||Y||- / -||-||-||-||2.0||-||-||-|
|13.||Nikon D70s||Y||- / -||-||-||-||2.0||-||-||-|
|14.||Nikon D70||Y||- / -||-||-||-||1.0||-||-||-|
|15.||Sony A68||Y||stereo / mono||Y||-||micro||2.0||-||-||-|
|16.||Sony A7 II||Y||stereo / mono||Y||Y||micro||2.0||Y||Y||-|
|17.||Sony A77||Y||stereo / mono||Y||-||mini||2.0||-||-||-|
It is notable that the A77 II offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the R-D1 does not provide wifi capability.
Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.
The A77 II is a recent model that features in the current product line-up of Sony. In contrast, the R-D1 has been discontinued (but can be found pre-owned on eBay). There has not been a direct replacement model for the R-D1 from Epson. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Epson and Sony websites.
So how do things add up? Is there a clear favorite between the Epson R-D1 and the Sony A77 II? Which camera is better? The listing below highlights the relative strengths of the two models.
Reasons to prefer the Epson R-D1:
- Brighter framing: Features an optical viewfinder for clear, lag-free composition.
- More compact: Is smaller (142x89mm vs 143x104mm) and thus needs less room in the bag.
- More heavily discounted: Has been available for much longer (launched in March 2004).
Advantages of the Sony Alpha SLT-A77 II:
- More detail: Has more megapixels (24 vs 6MP), which boosts linear resolution by 100%.
- Broader imaging potential: Can capture not only stills but also 1080/60p video.
- More framing info: Has an electronic viewfinder that displays shooting data.
- Easier setting verification: Features a control panel on top to check shooting parameters.
- 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 (1229k vs 235k dots).
- More flexible LCD: Has a full-flex screen for odd-angle shots in portrait or landscape orientation.
- More selfie-friendly: Has an articulated screen that can be turned to be front-facing.
- Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/2000s) to freeze action.
- Faster burst: Shoots at higher frequency (12 vs 1 flaps/sec) to capture the decisive moment.
- Better sealing: Is splash and dust sealed for shooting in inclement weather conditions.
- 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.
- Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
- Easier device pairing: Supports NFC for fast wireless image transfer over short distances.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More affordable: Was introduced into a lower priced category (60 percent cheaper at launch).
- More modern: Reflects 10 years and 1 month of technical progress since the R-D1 launch.
If the number of relative strengths (bullet points above) is taken as a guide, the A77 II is the clear winner of the contest (18 : 3 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 wedding photographer will view the differences between cameras in a way that diverges from the perspective of a travel photog, and a person interested in cityscapes has distinct needs from a macro shooter. Hence, the decision which camera is best and worth buying is often a very personal one.
In any case, while the comparison of technical specifications can provide a useful overview of the capabilities of different cameras, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the R-D1 or the A77 II. User reviews that are available, for instance, at amazon can sometimes shed light on these issues, but such feedback is all too often partial, inconsistent, and inaccurate.
This is why hands-on reviews by experts are important. The adjacent summary-table relays the overall verdicts of several of the most popular 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.
|1.||Epson R-D1||..||..||..||..||..||..||Mar 2004||2,999|
|2.||Sony A77 II||4/5||..||..||80/100||4.5/5||5/5||May 2014||1,199|
|3.||Canon Rebel||..||..||..||+ +||..||..||Aug 2003||899|
|4.||Leica CL||..||..||4.2/5||..||..||4/5||Nov 2017||2,795|
|5.||Leica M10||4.5/5||..||..||..||4/5||4.5/5||Jan 2017||6,595|
|6.||Leica X-U Typ 113||3.5/5||..||..||..||..||3.5/5||Jan 2016||2,950|
|7.||Leica X Vario||3/5||..||..||..||4/5||4/5||Jun 2013||2,850|
|8.||Leica M9||..||..||..||..||4.5/5||..||Sep 2009||7,999|
|9.||Nikon D7200||4/5||+ +||..||84/100||4.5/5||4.5/5||Mar 2015||1,199|
|10.||Nikon D7100||5/5||+ +||..||85/100||4.5/5||4.5/5||Feb 2013||1,199|
|11.||Nikon D40||..||81/100||..||+ +||o||4.5/5||Nov 2006||499|
|12.||Nikon D50||..||78/100||..||+ +||4/5||4.5/5||Apr 2005||749|
|13.||Nikon D70s||..||..||..||..||..||5/5||Apr 2005||899|
|14.||Nikon D70||..||..||..||+ +||..||..||Jan 2004||999|
|15.||Sony A68||3/5||..||..||..||4/5||4/5||Nov 2015||699|
|16.||Sony A7 II||5/5||+||4/5||82/100||4.5/5||5/5||Nov 2014||1,999|
|17.||Sony A77||5/5||91/100||..||81/100||..||5/5||Aug 2011||1,399|
|Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.|
The review scores listed above should be treated with care, though. The ratings were established in reference to similarly priced cameras that were available in the market at the time of the review. Hence, a score should always be seen in the context of the camera's market launch date and its price, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. Also, kindly note that some of the listed sites have over time developped their review approaches and their reporting style.
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 use the search menu below. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.
- Canon 1300D vs Epson R-D1
- Canon 90D vs Epson R-D1
- Canon G9 X Mark II vs Sony A77 II
- Canon M10 vs Epson R-D1
- Canon SX50 vs Sony A77 II
- Epson R-D1 vs Leica SL
- Epson R-D1 vs Nikon D5500
- Epson R-D1 vs Olympus E-P3
- Leica M-E Typ 240 vs Sony A77 II
- Nikon B600 vs Sony A77 II
- Pentax K-3 II vs Sony A77 II
- Sony A77 vs Sony A77 II
Specifications: Epson R-D1 vs Sony A77 II
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 Model||Epson R-D1||Sony A77 II|
|Camera Type||Rangefinder camera||Digital single lens reflex|
|Camera Lens||Leica M mount lenses||Sony A mount lenses|
|Launch Date||March 2004||May 2014|
|Launch Price||USD 2,999||USD 1,199|
|Sensor Specs||Epson R-D1||Sony A77 II|
|Sensor Format||APS-C Sensor||APS-C Sensor|
|Sensor Size||23.7 x 15.6 mm||23.5 x 15.6 mm|
|Sensor Area||369.72 mm2||366.6 mm2|
|Sensor Diagonal||28.4 mm||28.2 mm|
|Sensor Resolution||6 Megapixels||24 Megapixels|
|Image Resolution||3008 x 2000 pixels||6000 x 4000 pixels|
|Pixel Pitch||7.85 μm||3.91 μm|
|Pixel Density||1.63 MP/cm2||6.55 MP/cm2|
|Moiré control||Anti-Alias filter||Anti-Alias filter|
|Movie Capability||no Video||1080/60p Video|
|ISO Setting||200 - 1,600 ISO||100 - 25,600 ISO|
|ISO Boost||no Enhancement||50 - 51,200 ISO|
|Screen Specs||Epson R-D1||Sony A77 II|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Field of View||100%||100%|
|Viewfinder Resolution||2359k dots|
|Top-Level Screen||no Top Display||Control Panel|
|LCD Framing||Live View|
|Rear LCD Size||2.0inch||3.0inch|
|LCD Resolution||235k dots||1229k dots|
|LCD Attachment||Fixed screen||Fully flexible screen|
|Shooting Specs||Epson R-D1||Sony A77 II|
|Focus System||Manual Focus||Phase-detect AF|
|Manual Focusing Aid||no Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/2000s||1/8000s|
|Continuous Shooting||1 shutter flaps/s||12 shutter flaps/s|
|Image Stabilization||no shake reduction||In-body stabilization|
|Fill Flash||no On-Board Flash||Built-in Flash|
|Storage Medium||SDHC cards||MS or SDXC cards|
|Second Storage Option||Single card slot||Single card slot|
|UHS card support||no||UHS-I|
|Connectivity Specs||Epson R-D1||Sony A77 II|
|Studio Flash||PC Sync socket||PC Sync socket|
|USB Connector||no USB||USB 2.0|
|HDMI Port||no HDMI||mini HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Wifi Support||no Wifi||Wifi built-in|
|Near-Field Communication||no NFC||NFC built-in|
|Body Specs||Epson R-D1||Sony A77 II|
|Environmental Sealing||not weather sealed||Weathersealed body|
142 x 89 x 40 mm
(5.6 x 3.5 x 1.6 in)
143 x 104 x 81 mm
(5.6 x 4.1 x 3.2 in)
|Camera Weight||620 g (21.9 oz)||647 g (22.8 oz)|
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