Nikon D40 vs Olympus E-510

The Nikon D40 and the Olympus E-510 are two digital cameras that were announced, respectively, in November 2006 and March 2007. Both are DSLR (Digital Single Lens Reflex) cameras that are based on an APS-C (D40) and a Four Thirds (E-510) sensor. The Nikon has a resolution of 6 megapixels, whereas the Olympus provides 10 MP.

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

Headline Specifications

Nikon D40		Olympus E-510
Digital single lens reflex		Digital single lens reflex
Nikon F mount lenses		Four Thirds lenses
6 MP – APS-C sensor		10 MP – Four Thirds sensor
no Video		no Video
ISO 200-1,600 (200 - 3,200)		ISO 100-1,600
Optical viewfinder		Optical viewfinder
2.5" LCD – 230k dots		2.5" LCD – 215k dots
Fixed screen (not touch-sensitive)		Fixed screen (not touch-sensitive)
2.5 shutter flaps per second		3 shutter flaps per second
Lens stabilization only		In-body stabilization
470 shots per battery charge		750 shots per battery charge
124 x 94 x 64 mm, 522 g		136 x 92 x 68 mm, 538 g

Check D40 offers at
ebay.com
Check E-510 offers at
ebay.com

Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D40 and the Olympus E-510? 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 Nikon D40 and the Olympus E-510. 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 Olympus E-510 is notably larger (7 percent) than the Nikon D40. Moreover, the E-510 is slightly heavier (3 percent) than the D40. In this context, it is worth noting that neither the D40 nor the E-510 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. A larger imaging sensor will tend to go along with bigger and heavier lenses, although exceptions exist. You can compare the optics available for the two cameras in the Nikon Lens Catalog (D40) and the Four Thirds Lens Catalog (E-510).

Concerning battery life, the D40 gets 470 shots out of its Nikon EN-EL9 battery, while the E-510 can take 750 images on a single charge of its Olympus BLM-1 power pack.

The adjacent table lists the principal physical characteristics of the two cameras alongside a wider set of alternatives. 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 (USD)	Street Price
1.		Nikon D40	124 mm	94 mm	64 mm	522 g	470	n	Nov 2006	499	ebay.com
2.		Olympus E-510	136 mm	92 mm	68 mm	538 g	750	n	Mar 2007	799	ebay.com
3.		Nikon D40X	124 mm	94 mm	64 mm	522 g	520	n	Mar 2007	729	ebay.com
4.		Nikon D50	133 mm	102 mm	76 mm	620 g	400	n	Apr 2005	749	ebay.com
5.		Nikon D60	126 mm	94 mm	64 mm	522 g	500	n	Jan 2008	629	ebay.com
6.		Nikon D70	140 mm	111 mm	78 mm	679 g	400	n	Jan 2004	999	ebay.com
7.		Nikon D70s	140 mm	111 mm	78 mm	679 g	500	n	Apr 2005	899	ebay.com
8.		Nikon D80	132 mm	103 mm	77 mm	668 g	600	n	Aug 2006	999	ebay.com
9.		Nikon D3000	126 mm	97 mm	64 mm	536 g	500	n	Jul 2009	599	ebay.com
10.		Nikon D3100	124 mm	96 mm	75 mm	505 g	550	n	Aug 2010	599	ebay.com
11.		Nikon D3300	124 mm	98 mm	76 mm	430 g	700	n	Jan 2014	499	ebay.com
12.		Nikon D3400	124 mm	98 mm	76 mm	445 g	1200	n	Aug 2016	499	ebay.com
13.		Olympus E-400	130 mm	91 mm	53 mm	435 g	500	n	Sep 2006	699	ebay.com
14.		Olympus E-410	130 mm	91 mm	53 mm	435 g	500	n	Mar 2007	699	ebay.com
15.		Olympus E-500	130 mm	95 mm	66 mm	479 g	750	n	Sep 2005	599	ebay.com
16.		Olympus E-520	136 mm	92 mm	68 mm	535 g	750	n	May 2008	699	ebay.com
17.		Olympus E-620	130 mm	94 mm	60 mm	521 g	500	n	Feb 2009	699	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 listed launch prices provide an indication of the market segment that the manufacturer of the cameras have been targeting. The D40 was launched at a markedly lower price (by 38 percent) than the E-510, 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 tend to be associated with larger, more expensive camera bodies and lenses.

Of the two cameras under consideration, the Nikon D40 features an APS-C sensor and the Olympus E-510 a Four Thirds sensor. The sensor area in the E-510 is 39 percent smaller. As a result of these sensor size differences, the cameras have a format factor of, respectively, 1.5 and 2.0. The sensor in the D40 has a native 3:2 aspect ratio, while the one in the E-510 offers a 4:3 aspect.

Despite having a smaller sensor, the E-510 offers a higher resolution of 10 megapixels, compared with 6 MP of the D40. 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 4.74μm versus 7.85μm for the D40). However, it should be noted that the E-510 is a somewhat more recent model (by 3 months) than the D40, and its sensor might have benefitted from technological advances during this time that partly offset its pixel-size disadvantage.

The resolution advantage of the Olympus E-510 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the E-510 for good quality output (200 dots per inch) amounts to 18.2 x 13.7 inches or 46.3 x 34.7 cm, for very good quality (250 dpi) 14.6 x 10.9 inches or 37.1 x 27.8 cm, and for excellent quality (300 dpi) 12.2 x 9.1 inches or 30.9 x 23.2 cm. The corresponding values for the Nikon D40 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 Nikon D40 has a native sensitivity range from ISO 200 to ISO 1600, which can be extended to ISO 200-3200. The corresponding ISO settings for the Olympus E-510 are ISO 100 to ISO 1600 (no boost).

In terms of underlying technology, the D40 is build around a CCD sensor, while the E-510 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. Of the two cameras under review, the D40 has a notably higher overall DXO score than the E-510 (overall score 4 points higher), which gives it an advantage in terms of imaging quality. This advantage is based on 0.2 bits lower color depth, 1 EV in additional dynamic range, and 0.3 stops in additional low light sensitivity. 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.		Nikon D40	APS-C	6.0	3008	2000	none	21.0	11.0	561	56
2.		Olympus E-510	Four Thirds	10.0	3648	2736	none	21.2	10.0	442	52
3.		Nikon D40X	APS-C	10.0	3872	2592	none	22.4	11.4	516	63
4.		Nikon D50	APS-C	6.0	3008	2000	none	20.9	10.8	560	55
5.		Nikon D60	APS-C	10.0	3872	2592	none	22.5	11.4	562	65
6.		Nikon D70	APS-C	6.0	3008	2000	none	20.4	10.3	529	50
7.		Nikon D70s	APS-C	6.0	3008	2000	none	20.4	10.3	529	50
8.		Nikon D80	APS-C	10.0	3872	2592	none	22.1	11.2	524	61
9.		Nikon D3000	APS-C	10.0	3872	2592	none	22.3	11.1	563	62
10.		Nikon D3100	APS-C	14.2	4608	3072	1080/24p	22.5	11.3	919	67
11.		Nikon D3300	APS-C	24.0	6000	4000	1080/60p	24.3	12.8	1385	82
12.		Nikon D3400	APS-C	24.0	6000	4000	1080/60p	24.8	13.9	1192	86
13.		Olympus E-400	Four Thirds	10.0	3648	2736	none	21.0	10.6	127	53
14.		Olympus E-410	Four Thirds	10.0	3648	2736	none	21.1	10.0	494	51
15.		Olympus E-500	Four Thirds	8.0	3264	2448	none	20.7	10.3	45	51
16.		Olympus E-520	Four Thirds	10.0	3648	2736	none	21.4	10.4	548	55
17.		Olympus E-620	Four Thirds	12.2	4032	3024	none	21.3	10.3	536	55
Note: DXO values in italics represent estimates based on sensor size and age.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The D40 and the E-510 are similar in the sense that both have an optical viewfinder. The latter is useful for getting a clear image for framing even in brightly lit environments. The viewfinders of both cameras offer the same field of view (95%), but the viewfinder of the D40 has a higher magnification than the one of the E-510 (0.53x vs 0.46x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The following table reports on some other key feature differences and similarities of the Nikon D40, the Olympus E-510, and comparable 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.		Nikon D40	optical	n	2.5 / 230	fixed	n	1/4000s	2.5/s	Y	n
2.		Olympus E-510	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	Y
3.		Nikon D40X	optical	n	2.5 / 230	fixed	n	1/4000s	3.0/s	Y	n
4.		Nikon D50	optical	n	2.0 / 130	fixed	n	1/4000s	2.5/s	Y	n
5.		Nikon D60	optical	n	2.5 / 230	fixed	n	1/4000s	3.0/s	Y	n
6.		Nikon D70	optical	n	1.8 / 130	fixed	n	1/8000s	3.0/s	Y	n
7.		Nikon D70s	optical	n	2.0 / 130	fixed	n	1/8000s	3.0/s	Y	n
8.		Nikon D80	optical	n	2.5 / 230	fixed	n	1/4000s	3.0/s	Y	n
9.		Nikon D3000	optical	n	3.0 / 230	fixed	n	1/4000s	3.0/s	Y	n
10.		Nikon D3100	optical	n	3.0 / 230	fixed	n	1/4000s	3.0/s	Y	n
11.		Nikon D3300	optical	n	3.0 / 921	fixed	n	1/4000s	5.0/s	Y	n
12.		Nikon D3400	optical	n	3.0 / 921	fixed	n	1/4000s	5.0/s	Y	n
13.		Olympus E-400	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	n
14.		Olympus E-410	optical	n	2.5 / 215	fixed	n	1/4000s	3.0/s	Y	n
15.		Olympus E-500	optical	n	2.5 / 215	fixed	n	1/4000s	2.5/s	Y	n
16.		Olympus E-520	optical	n	2.7 / 215	fixed	n	1/4000s	3.5/s	Y	Y
17.		Olympus E-620	optical	n	2.7 / 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.

One feature that differentiates the E-510 and the D40 is in-body image stabilization (IBIS). The E-510 reduces the risk of handshake-induced blur with all attached lenses, while the D40 offers no blur reduction with lenses that themselves do not provide optical image stabilization.

The D40 writes its imaging data to SDHC cards, while the E-510 uses Compact Flash or xD Picture cards. The E-510 features dual card slots, which can be very useful in case a memory card fails. In contrast, the D40 only has one slot.

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 Nikon D40 and Olympus E-510 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.		Nikon D40	Y	- / -	-	-	-	2.0	-	-	-
2.		Olympus E-510	Y	- / -	-	-	-	2.0	-	-	-
3.		Nikon D40X	Y	- / -	-	-	-	2.0	-	-	-
4.		Nikon D50	Y	- / -	-	-	-	2.0	-	-	-
5.		Nikon D60	Y	- / -	-	-	-	2.0	-	-	-
6.		Nikon D70	Y	- / -	-	-	-	1.0	-	-	-
7.		Nikon D70s	Y	- / -	-	-	-	2.0	-	-	-
8.		Nikon D80	Y	- / -	-	-	-	2.0	-	-	-
9.		Nikon D3000	Y	- / -	-	-	-	2.0	-	-	-
10.		Nikon D3100	Y	mono / mono	-	-	mini	2.0	-	-	-
11.		Nikon D3300	Y	mono / mono	Y	-	mini	2.0	-	-	-
12.		Nikon D3400	Y	mono / mono	-	-	mini	2.0	-	-	Y
13.		Olympus E-400	Y	- / -	-	-	-	2.0	-	-	-
14.		Olympus E-410	Y	- / -	-	-	-	2.0	-	-	-
15.		Olympus E-500	Y	- / -	-	-	-	2.0	-	-	-
16.		Olympus E-520	Y	- / -	-	-	-	2.0	-	-	-
17.		Olympus E-620	Y	- / -	-	-	-	2.0	-	-	-

Both the D40 and the E-510 have been discontinued, but can regularly be found used on ebay. The D40 was replaced by the Nikon D40X, while the E-510 was followed by the Olympus E-520. Further information on the features and operation of the D40 and E-510 can be found, respectively, in the Nikon D40 Manual (free pdf) or the online Olympus E-510 Manual.

Review summary

So how do things add up? Is the Nikon D40 better than the Olympus E-510 or vice versa? The listing below highlights the relative strengths of the two models.

Reasons to prefer the Nikon D40:

• Better image quality: Scores markedly higher (4 points) in the DXO overall assessment.
• More dynamic range: Captures a larger spectrum of light and dark details (1 EV of extra DR).
• Better low-light sensitivity: Requires less light for good images (0.3 stops ISO advantage).
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.53x vs 0.46x).
• More affordable: Was introduced into a lower priced category (38 percent cheaper at launch).
• More heavily discounted: Has been on the market for longer (launched in November 2006).

Arguments in favor of the Olympus E-510:

• More detail: Has more megapixels (10 vs 6MP), which boosts linear resolution by 26%.
• Faster burst: Shoots at higher frequency (3 vs 2.5 flaps/sec) to capture the decisive moment.
• Longer lasting: Gets more shots (750 versus 470) out of a single battery charge.
• Sharper images: Has stabilization technology built-in to reduce the impact of hand-shake.
• Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
• More modern: Was introduced somewhat (3 months) more recently.

If the count of relative strengths (bullet points above) is taken as a measure, the match-up finishes in a tie (6 points each). 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 Nikon D40 and the Olympus E-510 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 D40 or the E-510. 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.

Expert reviews

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 (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 (USD)	Street Price
1.		Nikon D40	..	81/100	..	+ +	o	4.5/5	Nov 2006	499	ebay.com
2.		Olympus E-510	..	89/100	..	+ +	3.5/5	4.5/5	Mar 2007	799	ebay.com
3.		Nikon D40X	..	79/100	..	+ +	4/5	4/5	Mar 2007	729	ebay.com
4.		Nikon D50	..	78/100	..	+ +	4/5	4.5/5	Apr 2005	749	ebay.com
5.		Nikon D60	..	80/100	..	+ +	4/5	4.5/5	Jan 2008	629	ebay.com
6.		Nikon D70	..	..	..	+ +	..	..	Jan 2004	999	ebay.com
7.		Nikon D70s	..	..	..	..	..	5/5	Apr 2005	899	ebay.com
8.		Nikon D80	..	+	..	+ +	o	4.5/5	Aug 2006	999	ebay.com
9.		Nikon D3000	..	+	..	72/100	4/5	4.5/5	Jul 2009	599	ebay.com
10.		Nikon D3100	5/5	+ +	..	72/100	4.5/5	4.5/5	Aug 2010	599	ebay.com
11.		Nikon D3300	3/5	+	..	77/100	4.5/5	4.5/5	Jan 2014	499	ebay.com
12.		Nikon D3400	4/5	+	4/5	76/100	4/5	4.5/5	Aug 2016	499	ebay.com
13.		Olympus E-400	..	85/100	..	..	4/5	4/5	Sep 2006	699	ebay.com
14.		Olympus E-410	..	86/100	..	+ +	4/5	4.5/5	Mar 2007	699	ebay.com
15.		Olympus E-500	..	76/100	..	+ +	..	..	Sep 2005	599	ebay.com
16.		Olympus E-520	..	87/100	..	+ +	4.5/5	4.5/5	May 2008	699	ebay.com
17.		Olympus E-620	3/5	88/100	..	72/100	4.5/5	5/5	Feb 2009	699	ebay.com
Note: (+ +) 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. 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. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

Check D40 offers at
ebay.com
Check E-510 offers at
ebay.com

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. Alternatively, you can follow any of the listed hyperlinks for comparisons that others found interesting.

~

Check D40 offers at
ebay.com
Check E-510 offers at
ebay.com

Did you notice an error on this page? If so, please get in touch, so that we can correct the information.