Contax N Digital vs Sony A58

The Contax N Digital and the Sony Alpha SLT-A58 are two digital cameras that were announced, respectively, in February 2002 and February 2013. Both are DSLR (Digital Single Lens Reflex) cameras that are based on a full frame (N Digital) and an APS-C (A58) sensor. The Contax has a resolution of 6.1 megapixels, whereas the Sony provides 19.8 MP.

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

Headline Specifications

Contax N Digital		Sony A58
Digital single lens reflex		Digital single lens reflex
Contax N mount lenses		Sony A mount lenses
6.1 MP – Full Frame sensor		19.8 MP – APS-C sensor
no Video		1080/60i Video
ISO 50-1,600		ISO 100-16,000 (100 - 25,600)
Optical viewfinder		Electronic viewfinder (1440k dots)
2.0" LCD – 200k dots		2.7" LCD – 460k dots
Fixed screen (not touch-sensitive)		Tilting screen (no touchscreen)
4 shutter flaps per second		5 shutter flaps per second
Lens stabilization only		In-body stabilization
100 shots per battery charge		690 shots per battery charge
152 x 138 x 80 mm, 990 g		129 x 95 x 78 mm, 492 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Contax N Digital and the Sony Alpha SLT-A58? 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.

Body comparison

The side-by-side display below illustrates the physical size and weight of the Contax N Digital and the Sony A58. The two cameras are presented according to their relative size. Three successive views from the front, the top, and the rear are shown. All size 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 A58 is considerably smaller (42 percent) than the Contax N Digital. Moreover, the A58 is substantially lighter (50 percent) than the N Digital. In this context, it is worth noting that neither the N Digital nor the A58 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.

As can be seen in the images above, the N Digital has a battery grip built in. This facilitates image-taking in portrait orientation and gives it additional battery power. In order to provide similar functionality for the A58, there are third party battery grips available as optional accessories (see here on ebay).

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, you can navigate to the CAM-parator app and make your selection from a broad list of cameras there.

Body Specifications

		Camera Model	Camera Width	Camera Height	Camera Depth	Camera Weight	Battery Life	Weather Sealing	Camera Launch	Launch Price	Street Price
1.		Contax N Digital	152 mm	138 mm	80 mm	990 g	100	n	Feb 2002	EUR 7 499	ebay.com
2.		Sony A58	129 mm	95 mm	78 mm	492 g	690	n	Feb 2013	EUR 549	ebay.com
3.		Canon 10D	150 mm	107 mm	75 mm	850 g	500	n	Feb 2003	EUR 1 999	ebay.com
4.		Canon 300D	142 mm	99 mm	72 mm	649 g	400	n	Aug 2003	EUR 1 095	ebay.com
5.		Canon D60	150 mm	107 mm	75 mm	855 g	620	n	Feb 2002	EUR 2 999	ebay.com
6.		Canon XC10	125 mm	102 mm	122 mm	1040 g	370	n	Apr 2015	EUR 2 199	ebay.com
7.		Leica M9	139 mm	80 mm	37 mm	585 g	550	n	Sep 2009	EUR 5 499	ebay.com
8.		Leica M10	139 mm	80 mm	39 mm	660 g	210	Y	Jan 2017	EUR 6 499	ebay.com
9.		Leica SL	147 mm	104 mm	39 mm	847 g	400	Y	Oct 2015	EUR 6 899	ebay.com
10.		Nikon D1X	157 mm	153 mm	85 mm	1100 g	1200	Y	Feb 2001	EUR 7 999	ebay.com
11.		Nikon D100	144 mm	116 mm	81 mm	780 g	370	n	Feb 2002	EUR 2 499	ebay.com
12.		Nikon D3300	124 mm	98 mm	76 mm	430 g	700	n	Jan 2014	EUR 499	ebay.com
13.		Panasonic FZ1000	137 mm	99 mm	131 mm	831 g	360	n	Jun 2014	EUR 899	ebay.com
14.		Sony A7 II	127 mm	96 mm	60 mm	599 g	350	Y	Nov 2014	EUR 2 099	ebay.com
15.		Sony A68	143 mm	104 mm	81 mm	610 g	540	n	Nov 2015	EUR 649	ebay.com
16.		Sony A6000	120 mm	67 mm	45 mm	344 g	360	n	Feb 2014	EUR 549	ebay.com
17.		Sony RX100	102 mm	58 mm	36 mm	240 g	330	n	Jun 2012	EUR 649	ebay.com
Note: Measurements and pricing do not include easily detachable parts, such as add-on or interchangeable lenses or optional viewfinders.
Convert to Imperial

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 A58 was launched at a markedly lower price (by 92 percent) than the N Digital, 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.

Sensor comparison

The size of the sensor inside a digital camera is one of the key determinants of image quality. A large sensor will tend to have larger individual pixels that provide better low-light sensitivity, wider dynamic range, and richer color-depth than smaller pixel-units in a sensor of the same technological generation. Moreover, a large sensor camera will give the photographer more control over depth-of-field in the image and, thus, the ability to better isolate a subject from the 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 Contax N Digital features a full frame sensor and the Sony A58 an APS-C sensor. The sensor area in the A58 is 58 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.0 and 1.5. Both cameras have a native aspect ratio (sensor width to sensor height) of 3:2.

Despite having a smaller sensor, the A58 offers a higher resolution of 19.8 megapixels, compared with 6.1 MP of the N Digital. 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 4.31μm versus 11.90μm for the N Digital). However, it should be noted that the A58 is much more recent (by 10 years and 11 months) than the N Digital, 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 A58 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the A58 for good quality output (200 dots per inch) amounts to 27.3 x 18.2 inches or 69.3 x 46.1 cm, for very good quality (250 dpi) 21.8 x 14.5 inches or 55.4 x 36.9 cm, and for excellent quality (300 dpi) 18.2 x 12.1 inches or 46.2 x 30.8 cm. The corresponding values for the Contax N Digital are 15.2 x 10 inches or 38.6 x 25.5 cm for good quality, 12.2 x 8 inches or 30.9 x 20.4 cm for very good quality, and 10.1 x 6.7 inches or 25.7 x 17 cm for excellent quality prints.

The Contax N Digital has a native sensitivity range from ISO 50 to ISO 1600. The corresponding ISO settings for the Sony Alpha SLT-A58 are ISO 100 to ISO 16000, with the possibility to increase the ISO range to 100-25600.

In terms of underlying technology, the N Digital is build around a CCD sensor, while the A58 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.

For many cameras, data on sensor performance has been reported by DXO Mark. 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 following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

Sensor Characteristics

		Camera Model	Sensor Class	Resolution (MP)	Horiz. Pixels	Vert. Pixels	Video Format	DXO Portrait	DXO Landscape	DXO Sports	DXO Overall
1.		Contax N Digital	Full Frame	6.1	3040	2008	none	21.5	10.5	1283	59
2.		Sony A58	APS-C	19.8	5456	3632	1080/60i	23.3	12.5	753	74
3.		Canon 10D	APS-C	6.3	3072	2048	none	21.1	10.9	571	57
4.		Canon 300D	APS-C	6.3	3072	2048	none	21.0	10.8	544	55
5.		Canon D60	APS-C	6.3	3072	2048	none	20.3	9.8	301	47
6.		Canon XC10	1-inch	12.0	4000	3000	4K/30p	21.7	11.8	197	61
7.		Leica M9	Full Frame	18.1	5212	3472	none	22.5	11.7	884	69
8.		Leica M10	Full Frame	23.8	5952	3992	none	24.4	13.2	2133	86
9.		Leica SL	Full Frame	24.0	6000	4000	4K/30p	25.0	13.4	1821	88
10.		Nikon D1X	APS-C	5.9	3008	1960	none	..	..	..	..
11.		Nikon D100	APS-C	6.0	3008	2000	none	20.4	9.9	394	48
12.		Nikon D3300	APS-C	24.0	6000	4000	1080/60p	24.3	12.8	1385	82
13.		Panasonic FZ1000	1-inch	20.0	5472	3648	4K/30p	22.1	11.7	517	64
14.		Sony A7 II	Full Frame	24.0	6000	4000	1080/60p	24.9	13.6	2449	90
15.		Sony A68	APS-C	24.0	6000	4000	1080/60i	24.1	13.5	701	79
16.		Sony A6000	APS-C	24.0	6000	4000	1080/60p	24.1	13.1	1347	82
17.		Sony RX100	1-inch	20.0	5472	3648	1080/60p	22.6	12.4	390	66
Note: DXO values in italics represent estimates based on sensor size and age.

Many modern cameras are not only capable of taking still images, but also of capturing video footage. The A58 indeed provides for movie recording, while the N Digital does not. The highest resolution format that the A58 can use is 1080/60i.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the A58 has an electronic viewfinder (1440k dots), while the N Digital 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 viewfinder in the A58 offers a wider field of view (100%) than the one in the N Digital (95%), so that a larger proportion of the captured image is visible in the finder. On the other hand, the viewfinder of the N Digital has a higher magnification (0.73x vs 0.57x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The table below summarizes some of the other core capabilities of the Contax N Digital and Sony A58 in connection with corresponding information for a sample of similar cameras.

Core Features

		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.		Contax N Digital	optical	Y	2.0 / 200	fixed	n	1/8000s	4.0/s	n	n
2.		Sony A58	1440	n	2.7 / 460	tilting	n	1/4000s	5.0/s	Y	Y
3.		Canon 10D	optical	Y	1.8 / 118	fixed	n	1/4000s	3.0/s	Y	n
4.		Canon 300D	optical	n	1.8 / 118	fixed	n	1/4000s	2.5/s	Y	n
5.		Canon D60	optical	Y	1.8 / 114	fixed	n	1/4000s	3.0/s	Y	n
6.		Canon XC10	none	n	3.0 / 1030	tilting	Y	1/2000s	3.8/s	n	Y
7.		Leica M9	optical	n	2.5 / 230	fixed	n	1/4000s	2.0/s	n	n
8.		Leica M10	optical	n	3.0 / 1037	fixed	n	1/4000s	5.0/s	n	n
9.		Leica SL	4400	Y	3.0 / 1040	fixed	Y	1/8000s	11.0/s	n	n
10.		Nikon D1X	optical	Y	2.0 / 120	fixed	n	1/16000s	3.0/s	n	n
11.		Nikon D100	optical	Y	1.8 / 118	fixed	n	1/4000s	3.0/s	Y	n
12.		Nikon D3300	optical	n	3.0 / 921	fixed	n	1/4000s	5.0/s	Y	n
13.		Panasonic FZ1000	2359	n	3.0 / 921	swivel	n	1/4000s	12.0/s	Y	Y
14.		Sony A7 II	2400	n	3.0 / 1230	tilting	n	1/8000s	5.0/s	n	Y
15.		Sony A68	1440	Y	2.7 / 460	tilting	n	1/4000s	8.0/s	Y	Y
16.		Sony A6000	1440	n	3.0 / 922	tilting	n	1/4000s	11.0/s	Y	n
17.		Sony RX100	none	n	3.0 / 1229	fixed	n	1/2000s	10.0/s	Y	Y
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One feature that is present on the N Digital, but is missing on the A58 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 N Digital writes its imaging data to Compact Flash cards, while the A58 uses SDXC or Memory Stick PRO Duo cards.

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 Contax N Digital and Sony Alpha SLT-A58 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

Input-Output Connections

		Camera Model	Hotshoe Port	Internal Mic / Speaker	Microphone Port	Headphone Port	HDMI Port	USB Port	WiFi Support	NFC Support	Bluetooth Support
1.		Contax N Digital	Y	- / -	-	-	-	FW	-	-	-
2.		Sony A58	Y	stereo / mono	Y	-	mini	2.0	-	-	-
3.		Canon 10D	Y	- / -	-	-	-	1.1	-	-	-
4.		Canon 300D	Y	- / -	-	-	-	1.1	-	-	-
5.		Canon D60	Y	- / -	-	-	-	1.1	-	-	-
6.		Canon XC10	Y	stereo / mono	Y	Y	mini	2.0	Y	Y	-
7.		Leica M9	Y	- / -	-	-	-	2.0	-	-	-
8.		Leica M10	Y	- / -	-	-	-	-	Y	-	-
9.		Leica SL	Y	stereo / mono	Y	Y	full	3.0	Y	-	-
10.		Nikon D1X	Y	- / -	-	-	-	FW	-	-	-
11.		Nikon D100	Y	- / -	-	-	-	1.1	-	-	-
12.		Nikon D3300	Y	mono / mono	Y	-	mini	2.0	-	-	-
13.		Panasonic FZ1000	Y	stereo / mono	Y	-	micro	2.0	Y	Y	-
14.		Sony A7 II	Y	stereo / mono	Y	Y	micro	2.0	Y	Y	-
15.		Sony A68	Y	stereo / mono	Y	-	micro	2.0	-	-	-
16.		Sony A6000	Y	stereo / mono	-	-	micro	2.0	Y	Y	-
17.		Sony RX100	-	stereo / mono	-	-	micro	2.0	-	-	-

Studio photographers will appreciate that the Contax N Digital (unlike the A58) features a PC Sync socket, so that professional strobe lights can be controlled by the camera.

Both the N Digital and the A58 have been discontinued, but can regularly be found used on ebay. The A58 was replaced by the Sony A68, while the N Digital does not have a direct successor. Further information on the two cameras (e.g. user guides, manuals), as well as related accessories, can be found on the official Contax and Sony websites.

Review summary

So what is the bottom line? Is there a clear favorite between the Contax N Digital and the Sony A58? Which camera is better? Below is a summary of the relative strengths of each of the two contestants.

Reasons to prefer the Contax N Digital:

• Brighter framing: Features an optical viewfinder for clear, lag-free composition.
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.73x vs 0.57x).
• Easier setting verification: Features an LCD display on top to control shooting parameters.
• Faster shutter: Has higher mechanical shutter speed (1/8000s vs 1/4000s) to freeze action.
• More portrait friendly: Features an integrated vertical grip for easier portrait shooting.
• 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 February 2002).

Advantages of the Sony Alpha SLT-A58:

• More detail: Has more megapixels (19.8 vs 6.1MP), which boosts linear resolution by 80%.
• Broader imaging potential: Can capture not only stills but also 1080/60i video.
• More framing info: Has an electronic viewfinder that displays shooting data.
• More complete view: Has a viewfinder with a larger field of view (100% vs 95%).
• Larger screen: Has a bigger rear LCD (2.7" vs 2.0") for image review and settings control.
• More detailed LCD: Has a higher resolution rear screen (460k vs 200k dots).
• More flexible LCD: Has a tilting screen for odd-angle shots in landscape orientation.
• Faster burst: Shoots at higher frequency (5 vs 4 flaps/sec) to capture the decisive moment.
• More compact: Is smaller (129x95mm vs 152x138mm) and will fit more readily into a bag.
• Less heavy: Has a lower weight (by 498g or 50 percent) and is thus easier to take along.
• Longer lasting: Gets more shots (690 versus 100) out of a single battery charge.
• 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 (92 percent cheaper at launch).
• More modern: Reflects 10 years and 11 months of technical progress since the N Digital launch.

If the count of relative strengths (bullet points above) is taken as a measure, the A58 is the clear winner of the contest (15 : 7 points). However, the pertinence of the various camera strengths will differ across photographers, so that you might want to weigh individual camera traits according to their importance for your own imaging needs before making a camera decision. 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.

How about other alternatives? Do the specifications of the Contax N Digital and the Sony A58 place the cameras among the top in their class? Find out in the latest Best DSLR Camera listing whether the two cameras rank among the cream of the crop.

In any case, while the specs-based evaluation of cameras can be instructive in revealing their potential as photographic tools, it remains partial and cannot reveal, for example, the shooting experience and imaging performance when actually working with the N Digital or the A58. At times, user reviews, such as those published at amazon, address these issues in a useful manner, but such feedback is on many occasions incomplete, inconsistent, and unreliable.

Expert reviews

This is where reviews by experts come in. 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.

Expert Camera Reviews

		Camera   Model	AP   score	CL   score	DCW   score	DPR   score	EPZ   score	PB   score	Camera Launch	Launch Price	Street Price
1.		Contax N Digital	..	..	..	..	..	..	Feb 2002	EUR 7 499	ebay.com
2.		Sony A58	3/5	..	..	..	4.5/5	4.5/5	Feb 2013	EUR 549	ebay.com
3.		Canon 10D	..	..	..	+ +	..	..	Feb 2003	EUR 1 999	ebay.com
4.		Canon 300D	..	..	..	+ +	..	..	Aug 2003	EUR 1 095	ebay.com
5.		Canon D60	..	..	..	+ +	o	..	Feb 2002	EUR 2 999	ebay.com
6.		Canon XC10	..	..	..	80/100	..	..	Apr 2015	EUR 2 199	ebay.com
7.		Leica M9	..	..	..	..	4.5/5	..	Sep 2009	EUR 5 499	ebay.com
8.		Leica M10	4.5/5	..	..	..	4/5	4.5/5	Jan 2017	EUR 6 499	ebay.com
9.		Leica SL	4/5	..	4/5	84/100	4.5/5	4/5	Oct 2015	EUR 6 899	ebay.com
10.		Nikon D1X	..	..	..	+ +	..	..	Feb 2001	EUR 7 999	ebay.com
11.		Nikon D100	..	..	..	+ +	o	..	Feb 2002	EUR 2 499	ebay.com
12.		Nikon D3300	3/5	+	..	77/100	4.5/5	4.5/5	Jan 2014	EUR 499	ebay.com
13.		Panasonic FZ1000	4/5	+ +	..	82/100	4.5/5	4.5/5	Jun 2014	EUR 899	ebay.com
14.		Sony A7 II	5/5	+	4/5	82/100	4.5/5	5/5	Nov 2014	EUR 2 099	ebay.com
15.		Sony A68	3/5	..	..	..	4/5	4/5	Nov 2015	EUR 649	ebay.com
16.		Sony A6000	5/5	+	4.5/5	80/100	4.5/5	5/5	Feb 2014	EUR 549	ebay.com
17.		Sony RX100	5/5	+ +	..	78/100	4/5	5/5	Jun 2012	EUR 649	ebay.com
Note: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

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.

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Check A58 offers at
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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.

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