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Olympus E-400 vs YI M1

The Olympus E-400 and the YI M1 are two digital cameras that were announced, respectively, in September 2006 and September 2016. The E-400 is a DSLR, while the M1 is a mirrorless interchangeable lens camera. Both cameras are equipped with a Four Thirds sensor. The Olympus has a resolution of 10 megapixels, whereas the YI provides 20.2 MP.

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

Headline Specifications
Olympus E-400
versus
YI M1
Olympus E-400   YI M1
Digital single lens reflex Mirrorless system camera
Four Thirds lenses Micro Four Thirds lenses
10 MP – Four Thirds sensor 20.2 MP – Four Thirds sensor
no Video 4K/30p Video
ISO 100-1,600 ISO 100-25,600
Optical viewfinder No viewfinder, LCD framing
2.5" LCD – 215k dots 3.0" LCD – 1040k dots
Fixed screen (not touch-sensitive) Fixed touchscreen
3 shutter flaps per second 5 shutter flaps per second
500 shots per battery charge450 shots per battery charge
130 x 91 x 53 mm, 435 g 114 x 64 x 34 mm, 281 g
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Going beyond this snapshot of core features and characteristics, what are the differences between the Olympus E-400 and the YI M1? 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

An illustration of the physical size and weight of the Olympus E-400 and the YI M1 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 dimensions are rounded to the nearest millimeter.

The M1 can be obtained in two different colors (black, silver), while the E-400 is only available in black.

Size Olympus E-400 vs YI M1
Compare E-400 versus M1 top
Comparison E-400 or M1 rear

If the front view area (width x height) of the cameras is taken as an aggregate measure of their size, the YI M1 is considerably smaller (38 percent) than the Olympus E-400. Moreover, the M1 is substantially lighter (35 percent) than the E-400. In this context, it is worth noting that neither the E-400 nor the M1 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. Both cameras have similarly sized sensors, but DSLRs have a larger flange-to-focal plane distance than mirrorless cameras, which imposes contraints on the optical engineering process and generally leads to bigger and heavier lenses. You can compare the optics available for the two cameras in the Four Thirds Lens Catalog (E-400) and the Micro Four Thirds Lens Catalog (M1). Mirrorless cameras, such as the M1, have moreover the advantage that they can use many lenses from other systems via adapters, as they have a relatively short flange to focal plane distance.

The power pack in the M1 can be charged via the USB port, which can be very convenient when travelling.

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.

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Body Specifications
    Camera
Model
Camera
Width
Camera
Height
Camera
Depth
Camera
Weight
Battery
Life
Weather
Sealing
Camera
Launch
Launch
Price (USD)
Street
Price
1.
 
Olympus E-400 130 mm 91 mm 53 mm 435 g 500 n Sep 2006 699ebay.com
2.
 
YI M1 114 mm 64 mm 34 mm 281 g 450 n Sep 2016 349ebay.com
3.
 
Canon SX730 110 mm 64 mm 40 mm 300 g 250 n Apr 2017 399ebay.com
4.
 
Canon SX420 104 mm 69 mm 85 mm 325 g 195 n Jan 2016 299ebay.com
5.
 
Canon SX710 113 mm 66 mm 35 mm 269 g 230 n Jan 2015 349ebay.com
6.
 
Fujifilm X-A3 117 mm 67 mm 40 mm 339 g 410 n Aug 2016 399ebay.com
7.
 
Nikon 1 J5 98 mm 60 mm 32 mm 231 g 250 n Apr 2015 399ebay.com
8.
 
Nikon D40X 124 mm 94 mm 64 mm 522 g 520 n Mar 2007 729ebay.com
9.
 
Olympus Stylus 1s 116 mm 87 mm 57 mm 402 g 450 n Apr 2015 699ebay.com
10.
 
Olympus Stylus 1 116 mm 87 mm 57 mm 402 g 410 n Oct 2013 699ebay.com
11.
 
Olympus E-450 130 mm 91 mm 53 mm 440 g 500 n Mar 2009 499ebay.com
12.
 
Olympus E-620 130 mm 94 mm 60 mm 521 g 500 n Feb 2009 699ebay.com
13.
 
Olympus E-420 130 mm 91 mm 53 mm 440 g 500 n Mar 2008 599ebay.com
14.
 
Olympus E-410 130 mm 91 mm 53 mm 435 g 500 n Mar 2007 699ebay.com
15.
 
Olympus E-510 136 mm 92 mm 68 mm 538 g 750 n Mar 2007 799ebay.com
16.
 
Olympus E-500 130 mm 95 mm 66 mm 479 g 750 n Sep 2005 599ebay.com
17.
 
Panasonic L10 135 mm 96 mm 78 mm 556 g 450 n Aug 2007 599ebay.com
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 retail prices at the time of the camera’s release place the model in the market relative to other models in the producer’s line-up and the competition. The M1 was launched at a markedly lower price (by 50 percent) than the E-400, 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 imaging sensor is a crucial determinant 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. Further, a large sensor camera will give the photographer additional creative options when using shallow depth-of-field to isolate a subject from its background. On the downside, larger sensors are more costly to manufacture and tend to lead to bigger and heavier cameras and lenses.

Both cameras under consideration feature a Four Thirds sensor and have a format factor (sometimes also referred to as "crop factor") of 2.0. Within the spectrum of camera sensors, this places the review cameras among the medium-sized sensor cameras that aim to strike a balance between image quality and portability. Both cameras feature a native aspect ratio (sensor width to sensor height) of 4:3.

Olympus E-400 and YI M1 sensor measures

While the two cameras under review share the same sensor size, the M1 offers a higher resolution of 20.2 megapixels, compared with 10 MP of the E-400. This megapixels advantage translates into a 42 percent gain in linear resolution. On the other hand, these sensor specs imply that the M1 has a higher pixel density and a smaller size of the individual pixel (with a pixel pitch of 3.34μm versus 4.74μm for the E-400). However, it should be noted that the M1 is much more recent (by 10 years) than the E-400, and its sensor will have benefitted from technological advances during this time that compensate for the smaller pixel size.

The resolution advantage of the YI M1 implies greater flexibility for cropping images or the possibility to print larger pictures. The maximum print size of the M1 for good quality output (200 dots per inch) amounts to 25.9 x 19.4 inches or 65.8 x 49.4 cm, for very good quality (250 dpi) 20.7 x 15.6 inches or 52.7 x 39.5 cm, and for excellent quality (300 dpi) 17.3 x 13 inches or 43.9 x 32.9 cm. The corresponding values for the Olympus E-400 are 18.2 x 13.7 inches or 46.3 x 34.7 cm for good quality, 14.6 x 10.9 inches or 37.1 x 27.8 cm for very good quality, and 12.2 x 9.1 inches or 30.9 x 23.2 cm for excellent quality prints.

The Olympus E-400 has a native sensitivity range from ISO 100 to ISO 1600. The corresponding ISO settings for the YI M1 are ISO 100 to ISO 25600 (no boost).

Technology-wise, both cameras are equipped with CMOS (Complementary Metal–Oxide–Semiconductor) sensors. Both cameras use a Bayer filter for capturing RGB colors on a square grid of photosensors. This arrangement is found in most digital cameras.

E-400 versus M1 MP

Since 2007, DXO Mark has published sensor performance measurements that have been derived using a consistent methodology. 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 following table provides an overview of the physical sensor characteristics, as well as the sensor quality measurements for a selection of comparators.

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Sensor Characteristics
    Camera
Model
Sensor
Class
Resolution
(MP)
Horiz.
Pixels
Vert.
Pixels
Video
Format
DXO
Portrait
DXO
Landscape
DXO
Sports
DXO
Overall
1.
 
Olympus E-400 Four Thirds 10.0 3648 2736none21.010.612753
2.
 
YI M1 Four Thirds 20.2 5184 38884K/30p23.012.6103073
3.
 
Canon SX730 1/2.3 20.2 5184 38881080/60p20.511.992450
4.
 
Canon SX420 1/2.3 19.9 5152 3864720/25p20.311.780648
5.
 
Canon SX710 1/2.3 20.2 5184 38881080/60p20.211.671247
6.
 
Fujifilm X-A3 APS-C 24.0 6000 40001080/60p23.813.1166481
7.
 
Nikon 1 J5 1-inch 20.7 5568 37124K/15p21.112.047965
8.
 
Nikon D40X APS-C 10.0 3872 2592none22.411.451663
9.
 
Olympus Stylus 1s 1/1.7 11.8 3968 29761080/30p20.211.3-11147
10.
 
Olympus Stylus 1 1/1.7 11.8 3968 29761080/30p20.711.617951
11.
 
Olympus E-450 Four Thirds 10.0 3648 2736none21.510.551256
12.
 
Olympus E-620 Four Thirds 12.2 4032 3024none21.310.353655
13.
 
Olympus E-420 Four Thirds 10.0 3648 2736none21.510.452756
14.
 
Olympus E-410 Four Thirds 10.0 3648 2736none21.110.049451
15.
 
Olympus E-510 Four Thirds 10.0 3648 2736none21.210.044252
16.
 
Olympus E-500 Four Thirds 8.0 3264 2448none20.710.34551
17.
 
Panasonic L10 Four Thirds 10.0 3648 2736none21.310.842955
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 M1 indeed provides for movie recording, while the E-400 does not. The highest resolution format that the M1 can use is 4K/30p.

Feature comparison

Apart from body and sensor, cameras can and do differ across a range of features. For example, the E-400 has an optical viewfinder, which can be very useful when shooting in bright sunlight. In contrast, the M1 relies on live view and the rear LCD for framing. The following table reports on some other key feature differences and similarities of the Olympus E-400, the YI M1, and comparable cameras.

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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.
 
Olympus E-400optical n2.5 / 215 fixed n 1/4000s 3.0/s Y n
2.
 
YI M1none n3.0 / 1040 fixed Y 1/4000s 5.0/s n n
3.
 
Canon SX730none n3.0 / 922 tilting n 1/3200s 5.9/s Y Y
4.
 
Canon SX420none n3.0 / 230 fixed n 1/4000s 0.5/s Y Y
5.
 
Canon SX710none n3.0 / 922 fixed n 1/3200s 6.0/s Y Y
6.
 
Fujifilm X-A3none n3.0 / 1040 tilting Y 1/4000s 6.0/s Y n
7.
 
Nikon 1 J5none n3.0 / 1037 tilting Y 1/4000s 60.0/s Y n
8.
 
Nikon D40Xoptical n2.5 / 230 fixed n 1/4000s 3.0/s Y n
9.
 
Olympus Stylus 1s1440 n3.0 / 1040 tilting Y 1/2000s 7.0/s Y Y
10.
 
Olympus Stylus 11440 n3.0 / 1040 tilting Y 1/2000s 7.0/s Y Y
11.
 
Olympus E-450optical n2.7 / 215 fixed n 1/4000s 3.5/s Y n
12.
 
Olympus E-620optical n2.7 / 230 swivel n 1/4000s 4.0/s Y Y
13.
 
Olympus E-420optical n2.7 / 215 fixed n 1/4000s 3.5/s Y n
14.
 
Olympus E-410optical n2.5 / 215 fixed n 1/4000s 3.0/s Y n
15.
 
Olympus E-510optical n2.5 / 215 fixed n 1/4000s 3.0/s Y Y
16.
 
Olympus E-500optical n2.5 / 215 fixed n 1/4000s 2.5/s Y n
17.
 
Panasonic L10optical n2.5 / 207 swivel n 1/4000s 3.0/s Y n
Notes: *) Information refers to the mechanical shutter, unless the camera only has an electronic one.

One difference between the cameras concerns the presence of an on-board flash. The E-400 has one, while the M1 does not. While the built-in flash of the E-400 is not very powerful, it can at times be useful as a fill-in light.

The YI M1 has an intervalometer built-in. This enables the photographer to capture time lapse sequences, such as flower blooming, a sunset or moon rise, without purchasing an external camera trigger and related software.

The E-400 writes its imaging data to Compact Flash or xD Picture cards, while the M1 uses SDXC cards. The E-400 features dual card slots, which can be very useful in case a memory card fails. In contrast, the M1 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 Olympus E-400 and YI M1 and, in particular, the interfaces the cameras (and selected comparators) provide for accessory control and data transfer.

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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.
 
Olympus E-400Y- / ----2.0---
2.
 
YI M1Ystereo / mono--micro2.0Y-Y
3.
 
Canon SX730-stereo / mono--micro2.0YYY
4.
 
Canon SX420-mono / mono---2.0YY-
5.
 
Canon SX710-stereo / mono--micro2.0YY-
6.
 
Fujifilm X-A3Ystereo / mono--micro2.0Y--
7.
 
Nikon 1 J5-stereo / mono--micro2.0YY-
8.
 
Nikon D40XY- / ----2.0---
9.
 
Olympus Stylus 1sYstereo / mono--micro2.0Y--
10.
 
Olympus Stylus 1Ystereo / mono--micro2.0Y--
11.
 
Olympus E-450Y- / ----2.0---
12.
 
Olympus E-620Y- / ----2.0---
13.
 
Olympus E-420Y- / ----2.0---
14.
 
Olympus E-410Y- / ----2.0---
15.
 
Olympus E-510Y- / ----2.0---
16.
 
Olympus E-500Y- / ----2.0---
17.
 
Panasonic L10Y- / ----2.0---

It is notable that the M1 offers wifi support, which can be a very convenient means to transfer image data to an off-camera location. In contrast, the E-400 does not provide wifi capability.

Both the E-400 and the M1 have been discontinued, but can regularly be found used on ebay. The E-400 was replaced by the Olympus E-410, while the M1 does not have a direct successor. Further information on the features and operation of the E-400 and M1 can be found, respectively, in the Olympus E-400 Manual (free pdf) or the online YI M1 Manual.

Review summary

So what conclusions can be drawn? Which of the two cameras – the Olympus E-400 or the YI M1 – has the upper hand? Is one clearly better than the other? Below is a summary of the relative strengths of each of the two contestants.

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Arguments in favor of the Olympus E-400:

  • Easier framing: Has an optical viewfinder for image composition and settings control.
  • Longer lasting: Can take more shots (500 versus 450) on a single battery charge.
  • Easier fill-in: Is equipped with a small onboard flash to brighten deep shadow areas.
  • Greater peace of mind: Features a second card slot as a backup in case of memory card failure.
  • More heavily discounted: Has been available for much longer (launched in September 2006).

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Reasons to prefer the YI M1:

  • More detail: Has more megapixels (20.2 vs 10MP), which boosts linear resolution by 42%.
  • Broader imaging potential: Can capture not only stills but also 4K/30p video.
  • 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 (1040k vs 215k dots).
  • Fewer buttons to press: Has a touchscreen to facilitate handling and shooting adjustments.
  • Faster burst: Shoots at higher frequency (5 vs 3 flaps/sec) to capture the decisive moment.
  • Easier time-lapse photography: Has an intervalometer built-in for low frequency shooting.
  • More compact: Is smaller (114x64mm vs 130x91mm) and will fit more readily into a bag.
  • Less heavy: Has a lower weight (by 154g or 35 percent) and is thus easier to take along.
  • Easier travel charging: Can be conveniently charged via its USB port.
  • More legacy lens friendly: Can use many non-native lenses via adapters.
  • Easier file upload: Has wifi built in for automatic backup or image transfer to the web.
  • Easier wireless transfer: Supports Bluetooth for image sharing without cables.
  • More affordable: Was introduced into a lower priced category (50 percent cheaper at launch).
  • More modern: Reflects 10 years of technical progress since the E-400 launch.

If the count of relative strengths (bullet points above) is taken as a measure, the M1 is the clear winner of the contest (15 : 5 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.

E-400 05:15 M1

How about other alternatives? Do the specifications of the Olympus E-400 and the YI M1 place the cameras among the top in their class? Find out in the latest Best DSLR Camera and Best Mirrorless Interchangeable Lens Camera listings whether the two cameras rank among the cream of the crop.

In any case, while the comparison of the spec-sheets of cameras can offer a general idea of their imaging potential, it remains incomplete and does no justice, for example, to the way the E-400 or the M1 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.

Expert reviews

This is why expert reviews 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.

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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.
 
Olympus E-400..85/100....4/54/5 Sep 2006 699ebay.com
2.
 
YI M1......69/100.... Sep 2016 349ebay.com
3.
 
Canon SX730..+....4/54/5 Apr 2017 399ebay.com
4.
 
Canon SX420..........3/5 Jan 2016 299ebay.com
5.
 
Canon SX710..+....4/53.5/5 Jan 2015 349ebay.com
6.
 
Fujifilm X-A3......74/1004.5/54/5 Aug 2016 399ebay.com
7.
 
Nikon 1 J5........4.5/54.5/5 Apr 2015 399ebay.com
8.
 
Nikon D40X..79/100..+ +4/54/5 Mar 2007 729ebay.com
9.
 
Olympus Stylus 1s............ Apr 2015 699ebay.com
10.
 
Olympus Stylus 1..+ +....4.5/54.5/5 Oct 2013 699ebay.com
11.
 
Olympus E-450........4/54/5 Mar 2009 499ebay.com
12.
 
Olympus E-6203/588/100..72/1004.5/55/5 Feb 2009 699ebay.com
13.
 
Olympus E-420..85/100..+ +4/54.5/5 Mar 2008 599ebay.com
14.
 
Olympus E-410..86/100..+ +4/54.5/5 Mar 2007 699ebay.com
15.
 
Olympus E-510..89/100..+ +3.5/54.5/5 Mar 2007 799ebay.com
16.
 
Olympus E-500..76/100..+ +.... Sep 2005 599ebay.com
17.
 
Panasonic L10..85/100..+3.5/54/5 Aug 2007 599ebay.com
Notes: (+ +) highly recommended; (+) recommended; (o) reviewed; (..) not available.

The above review scores should be interpreted 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. A score, therefore, has to be seen in close connection to the price and market introduction time of the camera, and rating-comparisons among cameras that span long time periods or concern very differently equipped models make little sense. It should also be noted that some of the review sites have over time altered the way they render their verdicts.

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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.

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    Specifications: Olympus E-400 vs YI M1

    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 Specifications
    Camera Model Olympus E-400 YI M1
    Camera Type Digital single lens reflex Mirrorless system camera
    Camera Lens Four Thirds lenses Micro Four Thirds lenses
    Launch Date September 2006 September 2016
    Launch Price USD 699 USD 349
    Sensor Specs Olympus E-400 YI M1
    Sensor Technology CMOS CMOS
    Sensor Format Four Thirds Sensor Four Thirds Sensor
    Sensor Size 17.3 x 13.0 mm 17.3 x 13.0 mm
    Sensor Area 224.9 mm2 224.9 mm2
    Sensor Diagonal 21.6 mm 21.6 mm
    Crop Factor 2.0x 2.0x
    Sensor Resolution 10 Megapixels 20.2 Megapixels
    Image Resolution 3648 x 2736 pixels 5184 x 3888 pixels
    Pixel Pitch 4.74 μm 3.34 μm
    Pixel Density 4.44 MP/cm2 8.96 MP/cm2
    Moiré control Anti-Alias filter Anti-Alias filter
    Movie Capability no Video 4K/30p Video
    ISO Setting 100 - 1,600 ISO 100 - 25,600 ISO
    Screen Specs Olympus E-400 YI M1
    Viewfinder Type Optical viewfinder no viewfinder
    Viewfinder Field of View 95%
    Viewfinder Magnification 0.46x
    LCD Framing Live View
    Rear LCD Size 2.5inch 3.0inch
    LCD Resolution 215k dots 1040k dots
    LCD Attachment Fixed screen Fixed screen
    Touch Input no Touchscreen Touchscreen
    Shooting Specs Olympus E-400 YI M1
    Focus System Phase-detect AF Contrast-detect AF
    Manual Focusing Aidno Peaking FeatureFocus Peaking
    Max Shutter Speed (mechanical) 1/4000s 1/4000s
    Continuous Shooting 3 shutter flaps/s 5 shutter flaps/s
    Time-Lapse Photographyno IntervalometerIntervalometer built-in
    Fill Flash Built-in Flash no On-Board Flash
    Storage Medium CF or XD cards SDXC cards
    Single or Dual Card Slots Dual card slots Single card slot
    Connectivity Specs Olympus E-400 YI M1
    External Flash Hotshoe Hotshoe
    USB Connector USB 2.0 USB 2.0
    HDMI Port no HDMI micro HDMI
    Wifi Support no Wifi Wifi built-in
    Bluetooth Support no Bluetooth Bluetooth built-in
    Body Specs Olympus E-400 YI M1
    Battery Type BLS-1 BXM-10
    Battery Life (CIPA)500 shots per charge450 shots per charge
    In-Camera Charging no USB charging USB charging
    Body Dimensions 130 x 91 x 53 mm
    (5.1 x 3.6 x 2.1 in)
    114 x 64 x 34 mm
    (4.5 x 2.5 x 1.3 in)
    Camera Weight 435 g (15.3 oz) 281 g (9.9 oz)
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