Epson R-D1 vs Sony A99 II
The Epson R-D1 and the Sony Alpha ALT-A99 II are two digital cameras that were announced, respectively, in March 2004 and September 2016. The R-D1 is a rangefinder-style mirrorless camera, while the A99 II is a DSLR. The cameras are based on an APS-C (R-D1) and a full frame (A99 II) sensor. The Epson has a resolution of 6 megapixels, whereas the Sony provides 42.2 MP.
Below is an overview of the main specs of the two cameras as a starting point for the comparison.
|Epson R-D1||Sony A99 II|
|Rangefinder camera||Digital single lens reflex|
|Leica M mount lenses||Sony A mount lenses|
|6 MP, APS-C Sensor||42.2 MP, Full Frame Sensor|
|no Video||4K/30p Video|
|ISO 200-1600||ISO 100-25600|
|Optical viewfinder||Electronic viewfinder (2400k dots)|
|2.0" LCD, 235k dots||3.0" LCD, 1229k dots|
|Fixed screen (not touch-sensitive)||Fully flexible screen (no touchscreen)|
|1 shutter flaps per second||12 shutter flaps per second|
|No shake reduction||In-body stabilization|
|Not weather sealed||Weathersealed body|
|142 x 89 x 40 mm, 620 g||143 x 104 x 76 mm, 849 g|
Going beyond this snapshot of core features and characteristics, what are the differences between the Epson R-D1 and the Sony Alpha ALT-A99 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.
The physical size and weight of the Epson R-D1 and the Sony A99 II are illustrated 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 width, height and depth dimensions 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 A99 II is notably larger (18 percent) than the Epson R-D1. Moreover, the A99 II is substantially heavier (37 percent) than the R-D1. It is noteworthy in this context that the A99 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 table below summarizes the key physical specs of the two cameras alongside a broader set of comparators. If you would like to visualize and compare a different camera combination, just use the right or left arrows in the table to switch to the respective camera. Alternatively, you can also navigate to the CAM-parator app and make your selection from the full list of cameras there.
|Epson R-D1»||5.6 in||3.5 in||1.6 in||21.9 oz||..||n||Mar 2004||2,999||Epson R-D1|
|Sony A99 II«||5.6 in||4.1 in||3.0 in||29.9 oz||490||Y||Sep 2016||3,199||Sony A99 II|
|Canon 5DS R« »||6.0 in||4.6 in||3.0 in||32.8 oz||700||Y||Feb 2015||3,699||Canon 5DS R|
|Canon Rebel« »||5.6 in||3.9 in||2.8 in||22.9 oz||400||n||Aug 2003||899||Canon Rebel|
|Leica CL« »||5.2 in||3.1 in||1.8 in||14.2 oz||220||n||Nov 2017||2,795||Leica CL|
|Leica M10« »||5.5 in||3.1 in||1.5 in||23.3 oz||210||Y||Jan 2017||6,595||Leica M10|
|Leica X-U Typ 113« »||5.5 in||3.1 in||3.5 in||22.4 oz||450||Y||Jan 2016||2,950||Leica X-U Typ 113|
|Leica X Vario« »||5.2 in||2.9 in||3.7 in||24.0 oz||450||n||Jun 2013||2,850||Leica X Vario|
|Leica M9« »||5.5 in||3.1 in||1.5 in||20.6 oz||..||n||Sep 2009||7,999||Leica M9|
|Nikon D850« »||5.7 in||4.9 in||3.1 in||35.5 oz||1840||Y||Jul 2017||3,299||Nikon D850|
|Nikon D40« »||4.9 in||3.7 in||2.5 in||18.4 oz||470||n||Nov 2006||499||Nikon D40|
|Nikon D50« »||5.2 in||4.0 in||3.0 in||21.9 oz||400||n||Apr 2005||749||Nikon D50|
|Nikon D70s« »||5.5 in||4.4 in||3.1 in||24.0 oz||500||n||Apr 2005||899||Nikon D70s|
|Nikon D70« »||5.5 in||4.4 in||3.1 in||24.0 oz||400||n||Jan 2004||999||Nikon D70|
|Sony A7R II« »||5.0 in||3.8 in||2.4 in||22.0 oz||290||Y||Jun 2015||3,199||Sony A7R II|
|Sony A7S II« »||5.0 in||3.8 in||2.4 in||22.1 oz||370||Y||Sep 2015||2,999||Sony A7S II|
|Sony A99« »||5.8 in||4.4 in||3.1 in||28.6 oz||500||Y||Sep 2012||2,799||Sony A99|
|Note: Measurements and pricing do not include easily detachable parts, such as interchangeable lenses or optional viewfinders.|
Any camera decision will naturally be influenced heavily by the price. The listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The R-D1 was somewhat cheaper (by 6 percent) than the A99 II at launch, but both cameras fall into the same price category. Normally, street prices remain initially close to the MSRP, but after a couple of months, the first discounts appear. 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.
The size of the imaging sensor is a crucial determinant 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. 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 associated with larger, more expensive camera bodies and lenses.
Of the two cameras under consideration, the Epson R-D1 features an APS-C sensor and the Sony A99 II a full frame sensor. The sensor area in the A99 II is 133 percent bigger. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 1.0. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.
With 42.2MP, the A99 II offers a higher resolution than the R-D1 (6MP), but the A99 II has smaller individual pixels (pixel pitch of 4.52μm versus 7.85μm for the R-D1). Yet, the A99 II is a much more recent model (by 12 years and 6 months) than the R-D1, and its sensor will have benefitted from technological advances during this time that enhance the light gathering capacity of its pixel-units. Coming back to sensor resolution, it should be mentioned that the A99 II has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.
The resolution advantage of the Sony A99 II implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A99 II for good quality output (200 dots per inch) amounts to 39.8 x 26.5 inch or 101 x 67.4 cm, for very good quality (250 dpi) 31.8 x 21.2 inch or 80.8 x 53.9 cm, and for excellent quality (300 dpi) 26.5 x 17.7 inch or 67.3 x 44.9 cm. The corresponding values for the Epson R-D1 are 15 x 10 inch or 38.2 x 25.4 cm for good quality, 12 x 8 inch or 30.6 x 20.3 cm for very good quality, and 10 x 6.7 inch or 25.5 x 16.9 cm for excellent quality prints.
The A99 II has on-sensor phase detect pixels, which results in fast and reliable autofocus acquisition even during live view operation.
The Epson R-D1 has a native sensitivity range from ISO 200 to ISO 1600. The corresponding ISO settings for the Sony Alpha ALT-A99 II are ISO 100 to ISO 25600, with the possibility to increase the ISO range to 50-25600.
Consistent information on actual sensor performance is available from DXO Mark for many cameras. This service determines an overall sensor rating, as well as sub-scores for low-light sensitivity ("DXO Sports"), dynamic range ("DXO Landscape"), and color depth ("DXO Portrait"). The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.
|Epson R-D1||APS-C||6.0||3008||2000||none||..||..||..||..||Epson R-D1|
|Sony A99 II||Full Frame||42.2||7952||5304||4K/30p||25.4||13.4||2317||92||Sony A99 II|
|Canon 5DS R||Full Frame||50.3||8688||5792||1080/30p||24.6||12.4||2308||86||Canon 5DS R|
|Canon Rebel||APS-C||6.3||3072||2048||none||21.0||10.8||544||55||Canon Rebel|
|Leica CL||APS-C||24.1||6014||4014||4K/30p||..||..||..||..||Leica CL|
|Leica M10||Full Frame||23.8||5952||3992||none||24.4||13.2||2133||86||Leica M10|
|Leica X-U Typ 113||APS-C||16.1||4928||3264||1080/30p||..||..||..||..||Leica X-U Typ 113|
|Leica X Vario||APS-C||16.1||4928||3272||1080/30p||23.4||12.7||1320||78||Leica X Vario|
|Leica M9||Full Frame||18.1||5212||3472||none||22.5||11.7||884||69||Leica M9|
|Nikon D850||Full Frame||45.4||8256||5504||4K/30p||26.4||14.8||2660||100||Nikon D850|
|Nikon D40||APS-C||6.0||3008||2000||none||21.0||11.0||561||56||Nikon D40|
|Nikon D50||APS-C||6.0||3008||2000||none||20.9||10.8||560||55||Nikon D50|
|Nikon D70s||APS-C||6.0||3008||2000||none||20.4||10.3||529||50||Nikon D70s|
|Nikon D70||APS-C||6.0||3008||2000||none||20.4||10.3||529||50||Nikon D70|
|Sony A7R II||Full Frame||42.2||7952||5304||4K/30p||26.0||13.9||3434||98||Sony A7R II|
|Sony A7S II||Full Frame||12.0||4240||2832||4K/30p||23.6||13.3||2993||85||Sony A7S II|
|Sony A99||Full Frame||24.0||6000||4000||1080/60p||25.0||14.0||1555||89||Sony A99|
Many modern cameras are not only capable of taking still images, but can also record movies. The A99 II indeed provides for movie recording, while the R-D1 does not. The highest resolution format that the A99 II can use is 4K/30p.
Apart from body and sensor, cameras can and do differ across a variety of features. For example, the A99 II has an electronic viewfinder (2400k 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 adjacent table lists some of the other core features of the Epson R-D1 and Sony A99 II along with similar information for a selection of comparators.
|Epson R-D1||optical||n||2.0||235||fixed||n||1/2000s||1.0||n||n||Epson R-D1|
|Sony A99 II||2400||Y||3.0||1229||full-flex||n||1/8000s||12.0||n||Y||Sony A99 II|
|Canon 5DS R||optical||Y||3.2||1040||fixed||n||1/8000s||5.0||n||n||Canon 5DS R|
|Canon Rebel||optical||n||1.8||118||fixed||n||1/4000s||2.5||Y||n||Canon Rebel|
|Leica CL||2360||Y||3.0||1040||fixed||Y||1/8000s||10.0||n||n||Leica CL|
|Leica M10||optical||n||3.0||1037||fixed||n||1/4000s||5.0||n||n||Leica M10|
|Leica X-U Typ 113||optional||n||3.0||920||fixed||n||1/2000s||5.0||Y||n||Leica X-U Typ 113|
|Leica X Vario||optional||n||3.0||920||fixed||n||1/2000s||5.0||Y||n||Leica X Vario|
|Leica M9||optical||n||2.5||230||fixed||n||1/4000s||2.0||n||n||Leica M9|
|Nikon D850||optical||Y||3.2||2359||tilting||Y||1/8000s||9.0||n||n||Nikon D850|
|Nikon D40||optical||n||2.5||230||fixed||n||1/4000s||2.5||Y||n||Nikon D40|
|Nikon D50||optical||n||2.0||130||fixed||n||1/4000s||2.5||Y||n||Nikon D50|
|Nikon D70s||optical||n||2.0||130||fixed||n||1/8000s||3.0||Y||n||Nikon D70s|
|Nikon D70||optical||n||1.8||130||fixed||n||1/8000s||3.0||Y||n||Nikon D70|
|Sony A7R II||2400||n||3.0||1229||tilting||n||1/8000s||5.0||n||Y||Sony A7R II|
|Sony A7S II||2400||n||3.0||1229||tilting||n||1/8000s||5.0||n||Y||Sony A7S II|
|Sony A99||2359||Y||3.0||1229||full-flex||n||1/8000s||6.0||n||Y||Sony A99|
One feature that is present on the A99 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 A99 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 A99 II uses SDXC or Memory Stick PRO Duo cards. The A99 II features dual card slots, which can be very useful in case a memory card fails. In contrast, the R-D1 only has one slot. The A99 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 ALT-A99 II and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.
|Epson R-D1||Y||none||none||-||-||none||none||-||-||-||Epson R-D1|
|Sony A99 II||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||Y||Sony A99 II|
|Canon 5DS R||Y||mono||mono||Y||-||mini||3.0||-||-||-||Canon 5DS R|
|Canon Rebel||Y||none||none||-||-||none||1.1||-||-||-||Canon Rebel|
|Leica CL||Y||stereo||mono||-||-||none||none||Y||-||-||Leica CL|
|Leica M10||Y||none||none||-||-||none||none||Y||-||-||Leica M10|
|Leica X-U Typ 113||Y||stereo||mono||-||-||none||2.0||-||-||-||Leica X-U Typ 113|
|Leica X Vario||Y||stereo||mono||-||-||mini||2.0||-||-||-||Leica X Vario|
|Leica M9||Y||none||none||-||-||none||2.0||-||-||-||Leica M9|
|Nikon D850||Y||stereo||mono||Y||Y||mini||3.0||Y||Y||Y||Nikon D850|
|Nikon D40||Y||none||none||-||-||none||2.0||-||-||-||Nikon D40|
|Nikon D50||Y||none||none||-||-||none||2.0||-||-||-||Nikon D50|
|Nikon D70s||Y||none||none||-||-||none||2.0||-||-||-||Nikon D70s|
|Nikon D70||Y||none||none||-||-||none||1.0||-||-||-||Nikon D70|
|Sony A7R II||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7R II|
|Sony A7S II||Y||stereo||mono||Y||Y||micro||2.0||Y||Y||-||Sony A7S II|
|Sony A99||Y||stereo||mono||Y||Y||mini||2.0||-||-||-||Sony A99|
It is notable that the A99 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 offer wifi capability.
Both cameras feature a PC Sync terminal to control professional strobe lights, which will be appreciated by studio photographers.
The A99 II is a recent model that features in the current product line-up of Sony. In contrast, the R-D1 has been discontinued (but it 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 what conclusions can be drawn? Is the Epson R-D1 better than the Sony A99 II or vice versa? The listing below highlights the relative strengths of the two models.
Advantages of the Epson R-D1:
- Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
- 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.
- Less heavy: Is lighter (by 229g or 27 percent) and hence easier to carry around.
- More heavily discounted: Has been available for much longer (launched in March 2004).
Arguments in favor of the Sony Alpha ALT-A99 II:
- More detail: Has more megapixels (42.2 vs 6MP), which boosts linear resolution by 165%.
- Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
- Better image quality: Is equipped with a larger and more technologically advanced sensor.
- Richer colors: The sensor size advantage translates into images with better, more accurate colors.
- More dynamic range: Larger sensor captures a wider spectrum of light and dark details.
- Better low-light sensitivity: Larger sensor produces good images even in poorly lit environments.
- Broader imaging potential: Can capture not only stills but also 4K/30p video.
- Better live-view autofocus: Features on-sensor phase-detection for more confident autofocus.
- 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 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.
- Easier wireless transfer: Supports Bluetooth for image sharing without cables.
- Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
- Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
- More modern: Reflects 12 years and 6 months of technical progress since the R-D1 launch.
If the number of relative strengths (bullet points above) is taken as a guide, the A99 II is the clear winner of the contest (24 : 5 points). However, the relevance of individual strengths will vary across photographers, so that you might want to apply your own weighing scheme to the summary points when reflecting and deciding 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 incomplete and does no justice, for example, to the way the R-D1 or the A99 II perform in practice. 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 following table reports the overall ratings of the cameras as published by some of the major camera review sites (cameralabs, dpreview, ephotozine, imaging-resource, and photographyblog). 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.
The review scores listed above should be treated with care, though. The assessments were made in relation to similar cameras of the same technological generation. Hence, a score should always be seen in the context of the camera's market launch date and its price, and comparing ratings of very distinct cameras or ones that are far apart in terms of their release date have little meaning. 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? If you would like to see a different side-by-side camera review, just use the search menu below. There is also a set of direct links to comparison reviews that other users of the CAM-parator app explored.
- Canon 300D vs Epson R-D1
- Canon 300D vs Sony A99 II
- Canon 400D vs Epson R-D1
- Canon 750D vs Epson R-D1
- Epson R-D1 vs Fujifilm X-E2S
- Epson R-D1 vs Nikon D3100
- Epson R-D1 vs Panasonic LX15
- Epson R-D1 vs Sony A6600
- Fujifilm X-Pro1 vs Sony A99 II
- Leica T vs Sony A99 II
- Panasonic FZ2500 vs Sony A99 II
- Pentax 645Z vs Sony A99 II
Specifications: Epson R-D1 vs Sony A99 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 A99 II|
|Camera Type||Rangefinder camera||Digital single lens reflex|
|Camera Lens||Leica M mount lenses||Sony A mount lenses|
|Launch Date||March 2004||September 2016|
|Launch Price||USD 2999||USD 3199|
|Sensor Specs||Epson R-D1||Sony A99 II|
|Sensor Format||APS-C Sensor||Full Frame Sensor|
|Sensor Size||23.7 x 15.6 mm||35.9 x 24.0 mm|
|Sensor Area||369.72 mm2||861.6 mm2|
|Sensor Diagonal||28.4 mm||43.2 mm|
|Sensor Resolution||6 Megapixels||42.2 Megapixels|
|Image Resolution||3008 x 2000 pixels||7952 x 5304 pixels|
|Pixel Pitch||7.85 μm||4.52 μm|
|Pixel Density||1.63 MP/cm2||4.90 MP/cm2|
|Moiré control||Anti-Alias filter||no AA filter|
|Movie Capability||no Video||4K/30p Video|
|ISO Setting||200-1600 ISO||100-25600 ISO|
|ISO Boost||no Enhancement||50-25600 ISO|
|DXO Sensor Quality (score)||..||92|
|DXO Color Depth (bits)||..||25.4|
|DXO Dynamic Range (EV)||..||13.4|
|DXO Low Light (ISO)||..||2317|
|Screen Specs||Epson R-D1||Sony A99 II|
|Viewfinder Type||Optical viewfinder||Electronic viewfinder|
|Viewfinder Field of View||100%||100%|
|Viewfinder Resolution||2400k dots|
|Top-Level Screen||no Top Display||Control Panel|
|LCD Framing||Live View|
|Rear LCD Size||2.0 inch||3.0 inch|
|LCD Resolution||235k dots||1229k dots|
|LCD Attachment||Fixed screen||Fully flexible screen|
|Shooting Specs||Epson R-D1||Sony A99 II|
|Autofocus System||Contrast-detect AF||Phase-detect AF|
|Manual Focusing Aid||No Peaking Feature||Focus Peaking|
|Max Shutter Speed (mechanical)||1/2000/s||1/8000/s|
|Continuous Shooting||1 shutter flaps/s||12 shutter flaps/s|
|Image Stabilization||No shake reduction||In-body stabilization|
|Fill Flash||no On-Board Flash||no On-Board Flash|
|Storage Medium||SDHC cards||MS or SDXC cards|
|Second Storage Option||Single card slot||Dual card slots|
|UHS card support||no||UHS-I|
|Connectivity Specs||Epson R-D1||Sony A99 II|
|Studio Flash||PC Sync socket||PC Sync socket|
|USB Connector||USB no||USB 2.0|
|HDMI Port||no HDMI||micro HDMI|
|Microphone Port||no MIC socket||External MIC port|
|Headphone Socket||no Headphone port||Headphone port|
|Wifi Support||no Wifi||Wifi built-in|
|Near-Field Communication||no NFC||NFC built-in|
|Bluetooth Support||no Bluetooth||Bluetooth built-in|
|Body Specs||Epson R-D1||Sony A99 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 76 mm
(5.6 x 4.1 x 3.0 in)
|Camera Weight||620 g (21.9 oz)||849 g (29.9 oz)|
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