Nikon D3400 vs D40

The Nikon D3400 and the Nikon D40 are two digital cameras that were announced, respectively, in August 2016 and November 2006. Both are DSLR (Digital Single Lens Reflex) cameras that are equipped with an APS-C sensor. The D3400 has a resolution of 24 megapixels, whereas the D40 provides 6 MP.

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

Headline Specifications

Nikon D3400		Nikon D40
Digital single lens reflex		Digital single lens reflex
Nikon F mount lenses		Nikon F mount lenses
24 MP – APS-C sensor		6 MP – APS-C sensor
1080/60p Video		no Video
ISO 100-25,600		ISO 200-1,600 (200 - 3,200)
Optical viewfinder		Optical viewfinder
3.0" LCD – 921k dots		2.5" LCD – 230k dots
Fixed screen (not touch-sensitive)		Fixed screen (not touch-sensitive)
5 shutter flaps per second		2.5 shutter flaps per second
1200 shots per battery charge		470 shots per battery charge
124 x 98 x 76 mm, 445 g		124 x 94 x 64 mm, 522 g

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Going beyond this snapshot of core features and characteristics, what are the differences between the Nikon D3400 and the Nikon D40? 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 physical size and weight of the Nikon D3400 and the Nikon D40 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.

The D3400 can be obtained in two different colors (black, red), while the D40 is only available in black.

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the Nikon D40 is somewhat smaller (4 percent) than the Nikon D3400. However, the D40 is markedly heavier (17 percent) than the D3400. In this context, it is worth noting that neither the D3400 nor the D40 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. In this particular case, both cameras feature the same lens mount, so that they can use the same lenses. You can compare the optics available in the Nikon Lens Catalog.

Concerning battery life, the D3400 gets 1200 shots out of its Nikon EN-EL14a battery, while the D40 can take 470 images on a single charge of its Nikon EN-EL9 power pack.

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.		Nikon D3400	124 mm	98 mm	76 mm	445 g	1200	n	Aug 2016	US$ 499	ebay.com
2.		Nikon D40	124 mm	94 mm	64 mm	522 g	470	n	Nov 2006	US$ 499	ebay.com
3.		Canon SL2	122 mm	93 mm	70 mm	453 g	650	n	Jun 2017	US$ 549	ebay.com
4.		Nikon D40X	124 mm	94 mm	64 mm	522 g	520	n	Mar 2007	US$ 729	ebay.com
5.		Nikon D50	133 mm	102 mm	76 mm	620 g	400	n	Apr 2005	US$ 749	ebay.com
6.		Nikon D500	147 mm	115 mm	81 mm	860 g	1240	Y	Jan 2016	US$ 1 999	ebay.com
7.		Nikon D3100	124 mm	96 mm	75 mm	505 g	550	n	Aug 2010	US$ 599	ebay.com
8.		Nikon D3200	125 mm	96 mm	77 mm	505 g	540	n	Apr 2012	US$ 599	ebay.com
9.		Nikon D3300	124 mm	98 mm	76 mm	430 g	700	n	Jan 2014	US$ 499	ebay.com
10.		Nikon D3500	124 mm	97 mm	70 mm	415 g	1550	n	Aug 2018	US$ 429	ebay.com
11.		Nikon D5200	129 mm	98 mm	78 mm	555 g	500	n	Nov 2012	US$ 749	ebay.com
12.		Nikon D5300	125 mm	98 mm	76 mm	480 g	600	n	Oct 2013	US$ 799	ebay.com
13.		Nikon D5500	124 mm	97 mm	70 mm	470 g	820	n	Jan 2015	US$ 899	ebay.com
14.		Nikon D5600	124 mm	97 mm	70 mm	465 g	970	n	Nov 2016	US$ 699	ebay.com
15.		Nikon D7200	136 mm	107 mm	76 mm	765 g	1110	Y	Mar 2015	US$ 1 199	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 two cameras under review were launched at the same price and fall into the same market segment. 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.

Sensor comparison

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 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 D40 is 1 percent bigger. 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 Nikon D3400 offers a higher resolution of 24 megapixels, compared with 6 MP of the Nikon 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 3.91μm versus 7.85μm for the D40). However, it should be noted that the D3400 is much more recent (by 9 years and 9 months) than the D40, and its sensor will have benefitted from technological advances during this time that make it possible to gather light more efficiently. Coming back to sensor resolution, it should be mentioned that the D3400 has no anti-alias filter installed, so that it can capture all the detail its sensor resolves.

The resolution advantage of the Nikon D3400 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the D3400 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 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 D3400 has a native sensitivity range from ISO 100 to ISO 25600. The corresponding ISO settings for the Nikon D40 are ISO 200 to ISO 1600, with the possibility to increase the ISO range to 200-3200.

In terms of underlying technology, the D3400 is build around a CMOS sensor, while the D40 uses a CCD 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.

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"). Of the two cameras under review, the D3400 provides substantially higher image quality than the D40, with an overall score that is 30 points higher. This advantage is based on 3.8 bits higher color depth, 2.9 EV in additional dynamic range, and 1.1 stops in additional low light sensitivity. The adjacent table reports on the physical sensor characteristics and the outcomes of the DXO sensor quality tests for a sample of comparator-cameras.

Sensor Characteristics

		Camera Model	Sensor Class	Resolution (MP)	Horiz. Pixels	Vert. Pixels	Video Format	DXO Portrait	DXO Landscape	DXO Sports	DXO Overall
1.		Nikon D3400	APS-C	24.0	6000	4000	1080/60p	24.8	13.9	1192	86
2.		Nikon D40	APS-C	6.0	3008	2000	none	21.0	11.0	561	56
3.		Canon SL2	APS-C	24.0	6000	4000	1080/60p	23.6	13.4	1041	79
4.		Nikon D40X	APS-C	10.0	3872	2592	none	22.4	11.4	516	63
5.		Nikon D50	APS-C	6.0	3008	2000	none	20.9	10.8	560	55
6.		Nikon D500	APS-C	20.7	5568	3712	4K/30p	24.0	14.0	1324	83
7.		Nikon D3100	APS-C	14.2	4608	3072	1080/24p	22.5	11.3	919	67
8.		Nikon D3200	APS-C	24.1	6016	4000	1080/30p	24.1	13.2	1131	81
9.		Nikon D3300	APS-C	24.0	6000	4000	1080/60p	24.3	12.8	1385	82
10.		Nikon D3500	APS-C	24.0	6000	4000	1080/60p	24.0	13.4	1851	83
11.		Nikon D5200	APS-C	24.0	6000	4000	1080/60i	24.2	13.9	1284	84
12.		Nikon D5300	APS-C	24.0	6000	4000	1080/60p	24.0	13.9	1338	83
13.		Nikon D5500	APS-C	24.0	6000	4000	1080/60p	24.1	14.0	1438	84
14.		Nikon D5600	APS-C	24.0	6000	4000	1080/60p	24.1	14.0	1306	84
15.		Nikon D7200	APS-C	24.0	6000	4000	1080/60p	24.5	14.6	1333	87
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 D3400 indeed provides movie recording capabilities, while the D40 does not. The highest resolution format that the D3400 can use is 1080/60p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a variety of features. The D3400 and the D40 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 D3400 has a higher magnification than the one of the D40 (0.57x vs 0.53x), so that the size of the image transmitted appears closer to the size seen with the naked human eye. The adjacent table lists some of the other core features of the Nikon D3400 and Nikon D40 along with similar information for a selection of comparators.

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 D3400	optical	n	3.0 / 921	fixed	n	1/4000s	5.0/s	Y	n
2.		Nikon D40	optical	n	2.5 / 230	fixed	n	1/4000s	2.5/s	Y	n
3.		Canon SL2	optical	n	3.0 / 1040	swivel	Y	1/4000s	5.0/s	Y	n
4.		Nikon D40X	optical	n	2.5 / 230	fixed	n	1/4000s	3.0/s	Y	n
5.		Nikon D50	optical	n	2.0 / 130	fixed	n	1/4000s	2.5/s	Y	n
6.		Nikon D500	optical	Y	3.2 / 2359	tilting	Y	1/8000s	10.0/s	n	n
7.		Nikon D3100	optical	n	3.0 / 230	fixed	n	1/4000s	3.0/s	Y	n
8.		Nikon D3200	optical	n	3.0 / 921	fixed	n	1/4000s	4.0/s	Y	n
9.		Nikon D3300	optical	n	3.0 / 921	fixed	n	1/4000s	5.0/s	Y	n
10.		Nikon D3500	optical	n	3.0 / 921	fixed	n	1/4000s	5.0/s	Y	n
11.		Nikon D5200	optical	n	3.0 / 921	swivel	n	1/4000s	5.0/s	Y	n
12.		Nikon D5300	optical	n	3.2 / 1037	swivel	n	1/4000s	5.0/s	Y	n
13.		Nikon D5500	optical	n	3.2 / 1037	swivel	Y	1/4000s	5.0/s	Y	n
14.		Nikon D5600	optical	n	3.2 / 1037	swivel	Y	1/4000s	5.0/s	Y	n
15.		Nikon D7200	optical	Y	3.2 / 1229	fixed	n	1/8000s	6.0/s	Y	n
Note: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

The D3400 writes its imaging data to SDXC cards, while the D40 uses SDHC cards. The D3400 supports UHS-I cards (Ultra High Speed data transfer of up to 104 MB/s), while the D40 cannot take advantage of Ultra High Speed SD 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 Nikon D3400 and Nikon D40 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 D3400	Y	mono / mono	-	-	mini	2.0	-	-	Y
2.		Nikon D40	Y	- / -	-	-	-	2.0	-	-	-
3.		Canon SL2	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
4.		Nikon D40X	Y	- / -	-	-	-	2.0	-	-	-
5.		Nikon D50	Y	- / -	-	-	-	2.0	-	-	-
6.		Nikon D500	Y	stereo / mono	Y	Y	mini	3.0	Y	Y	Y
7.		Nikon D3100	Y	mono / mono	-	-	mini	2.0	-	-	-
8.		Nikon D3200	Y	mono / mono	Y	-	mini	2.0	-	-	-
9.		Nikon D3300	Y	mono / mono	Y	-	mini	2.0	-	-	-
10.		Nikon D3500	Y	mono / mono	-	-	mini	2.0	-	-	Y
11.		Nikon D5200	Y	stereo / mono	Y	-	mini	2.0	-	-	-
12.		Nikon D5300	Y	stereo / mono	Y	-	mini	2.0	Y	-	-
13.		Nikon D5500	Y	stereo / mono	Y	-	mini	2.0	Y	-	-
14.		Nikon D5600	Y	stereo / mono	Y	-	mini	2.0	Y	Y	Y
15.		Nikon D7200	Y	stereo / mono	Y	Y	mini	2.0	Y	Y	-

Both the D3400 and the D40 have been discontinued, but can regularly be found used on ebay. The D40 was replaced by the Nikon D40X, while the D3400 was followed by the Nikon D3500. Further information on the features and operation of the D3400 and D40 can be found, respectively, in the Nikon D3400 Manual (free pdf) or the online Nikon D40 Manual.

Review summary

So what conclusions can be drawn? Is the Nikon D3400 better than the Nikon D40 or vice versa? The listing below highlights the relative strengths of the two models.

Advantages of the Nikon D3400:

• More detail: Offers more megapixels (24 vs 6MP) with a 100% higher linear resolution.
• Maximized detail: Lacks an anti-alias filter to exploit the sensor's full resolution potential.
• Better image quality: Scores substantially higher (30 points) in the DXO overall assessment.
• Richer colors: Generates images with noticeably better colors (3.8 bits more color depth).
• More dynamic range: Captures a larger spectrum of light and dark details (2.9 EV of extra DR).
• Better low-light sensitivity: Requires less light for good images (1.1 stops ISO advantage).
• Broader imaging potential: Can record not only still images but also 1080/60p movies.
• Larger viewfinder image: Features a viewfinder with a higher magnification (0.57x vs 0.53x).
• Larger screen: Has a bigger rear LCD (3.0" vs 2.5") for image review and settings control.
• More detailed LCD: Has a higher resolution rear screen (921k vs 230k dots).
• Faster burst: Shoots at higher frequency (5 vs 2.5 flaps/sec) to capture the decisive moment.
• Less heavy: Is lighter (by 77g or 15 percent) and hence easier to carry around.
• Longer lasting: Can take more shots (1200 versus 470) on a single battery charge.
• Easier wireless transfer: Supports Bluetooth for image sharing without cables.
• Faster buffer clearing: Has an SD card interface that supports the UHS-I standard.
• More modern: Reflects 9 years and 9 months of technical progress since the D40 launch.

Arguments in favor of the Nikon D40:

• Better moiré control: Has an anti-alias filter to avoid artificial patterns to appear in images.
• More heavily discounted: Has been around for much longer (launched in November 2006).

If the number of relative strengths (bullet points above) is taken as a guide, the D3400 is the clear winner of the match-up (16 : 2 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 Nikon D3400 and the Nikon D40 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 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 D3400 or the D40 perform in practice. 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 why hands-on reviews by experts are important. The table below provides a synthesis of the camera assessments of some of the best known photo-gear 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.		Nikon D3400	4/5	+	4/5	76/100	4/5	4.5/5	Aug 2016	US$ 499	ebay.com
2.		Nikon D40	..	81/100	..	+ +	o	4.5/5	Nov 2006	US$ 499	ebay.com
3.		Canon SL2	4/5	+ +	4/5	78/100	4.5/5	4.5/5	Jun 2017	US$ 549	ebay.com
4.		Nikon D40X	..	79/100	..	+ +	4/5	4/5	Mar 2007	US$ 729	ebay.com
5.		Nikon D50	..	78/100	..	+ +	4/5	4.5/5	Apr 2005	US$ 749	ebay.com
6.		Nikon D500	5/5	+ +	4.7/5	91/100	4.5/5	5/5	Jan 2016	US$ 1 999	ebay.com
7.		Nikon D3100	5/5	+ +	..	72/100	4.5/5	4.5/5	Aug 2010	US$ 599	ebay.com
8.		Nikon D3200	5/5	+ +	..	73/100	4.5/5	4.5/5	Apr 2012	US$ 599	ebay.com
9.		Nikon D3300	3/5	+	..	77/100	4.5/5	4.5/5	Jan 2014	US$ 499	ebay.com
10.		Nikon D3500	4/5	..	4/5	75/100	4/5	4.5/5	Aug 2018	US$ 429	ebay.com
11.		Nikon D5200	4/5	+ +	..	79/100	4.5/5	4.5/5	Nov 2012	US$ 749	ebay.com
12.		Nikon D5300	4/5	+ +	..	79/100	4.5/5	4.5/5	Oct 2013	US$ 799	ebay.com
13.		Nikon D5500	5/5	+	..	79/100	4.5/5	4.5/5	Jan 2015	US$ 899	ebay.com
14.		Nikon D5600	4/5	..	4/5	79/100	4.5/5	4/5	Nov 2016	US$ 699	ebay.com
15.		Nikon D7200	4/5	+ +	..	84/100	4.5/5	4.5/5	Mar 2015	US$ 1 199	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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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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