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Design
With its tiny dimensions, the Coolpix 3100 could almost hide behind a credit
card (it's just a bit taller). Though the camera body has a few protrusions,
they're slight enough to prevent its hanging in pockets, especially when combined
with the smooth contours that define the camera. Despite its size, the Coolpix
3100 fit my hand surprisingly well, though I highly recommend making use of
the included wrist strap. The Coolpix 3100's duotone silver body is modern and
chic, with only a hint of slate blue on the front handgrip echoed by the screen
printed button icons on the back. High quality Nikkor optics and a 3.2-megapixel
CCD give the Coolpix 3100 great image quality, and a selection of Scene and
Framing Assist modes make operation a breeze, even for novice users. The Coolpix
3100 measures 3.4 x 2.5 x 1.5 inches (88 x 65 x 38 millimeters), and weighs
7.5 ounces (212 grams) without batteries or memory card.

The camera's front panel contains the 3x zoom lens, built-in flash, optical viewfinder window, and the self-timer lamp (right next to the flash). A shutter-like lens cover protects the lens when not in use, and automatically slides out of the way when the camera is powered on (eliminating the hassle of keeping track of a lens cap). When powered on, the lens telescopes out nearly 5/8 inch into its operating position. A curved, sculpted ridge beneath the Shutter button acts as a finger grip, and comfortably aligns your fingers as they wrap around the camera.

On the right side of the camera is the CompactFlash memory card compartment and an eyelet for attaching the wrist strap. The CompactFlash compartment door opens toward the back of the camera, and is hinged to the camera body so that it can open as wide as necessary to access the card. Inside the compartment, a small eject button releases the card from the slot.

On the opposite side of the camera is a connector compartment, protected by a plastic cover that remains attached to the camera. Inside are the Video Out / USB and DC In jacks.

The Shutter button, Mode dial, and Power switch are the only features on the Coolpix 3100's top panel.

The remaining external controls are all located on the camera's rear panel, along with the 1.5-inch, TFT color LCD monitor and optical viewfinder. Two LEDs next to the optical viewfinder light or flash to indicate camera status, such as when focus is set, the flash is charging, or the camera is accessing the memory card. A two-way zoom rocker button in the top right corner controls optical and digital zoom, as well as some Playback viewing options. In the center of the back panel is a multi-directional rocker pad, which accesses Flash, Macro, and Self-Timer options, in addition to navigating menu screens. Across the bottom of the LCD panel are the Erase, Display, Menu, and Playback/Transfer buttons.

The Coolpix 3100 has a flat bottom panel, although rounded edges curve up toward the rest of the camera. The battery compartment door and plastic, threaded tripod mount line up side-by-side, making quick battery changes while mounted to a tripod impossible. This won't likely be a problem for most Coolpix 3100 users, though, given the point-and-shoot nature of the camera. A hinged, plastic door covers the battery compartment, with a lock release button to open it.
Camera Operation
Despite the Coolpix 3100's limited exposure control, the camera offers a nice selection of external control buttons, making for an easy-to-navigate user interface. Flash mode, Self-Timer mode, Macro mode, zoom, record mode, and an Erase function are all accessible via external controls. The Mode dial on top of the camera accesses the main operating modes, and a multi-directional Arrow pad on the back panel navigates through on-screen menus, in addition to accessing camera features directly. The LCD menu system is fairly short, with user-friendly icons in the Scene and Framing Assist modes. Operating this camera is so straightforward I doubt you'll need the manual for much more than reference. It shouldn't take more than a few minutes to get into the swing of things.

Shutter Button: Resting slightly above the power switch, the Shutter button
sits on the right edge of the top panel. This button sets the camera's exposure
when halfway pressed, and releases the shutter when fully pressed.
Power Switch: Encircling the Shutter button on the top panel, you slide this switch briefly toward you to turn the camera on or off. When released, it springs back to its original position.

Mode Dial: The only other control on the top panel, this ribbed dial selects
the camera's main operating mode. Choices are Setup, Movie, Manual, Auto,
Scene, Portrait, Landscape, Sports, and Night Portrait.

Zoom (W and T) Rocker Button: Located in the top right corner of the camera's
back panel, this two-way rocker button controls the optical and digital zoom
(when enabled) in any record mode. In Playback mode, the "W" button
activates the index image display mode, while the "T" button controls
digital enlargement of the captured image.

Multi-Directional Arrow Pad (Flash, Self-Timer, and Macro Buttons): Situated
in the center of the rear panel, this button features four arrows, one pointing
in each direction. In any Settings menu, the arrow keys navigate through menu
selections.
In Playback mode, the right and left arrows scroll through captured images. During movie playback, the left arrow rewinds, the down arrow pauses or resumes, and the right arrow fast forwards when held down. You can step forward or back one frame at a time by pressing the right and left arrows when the movie is paused.
In Record mode, three of the arrow keys control specific exposure features. The up arrow controls the camera's flash mode, producing a popup menu of options (Auto, Red-Eye Reduction, Anytime Flash, and Flash Cancel). The left arrow activates the camera's Self-Timer mode, while the right arrow activates the Macro focus mode.

Playback / Transfer Button: Beneath the multi-direction Arrow pad, this
button accesses the camera's Playback mode. When the camera is connected to
a computer via the USB cable, this button enables one-touch image downloading.

Menu Button: Directly to the left of the Playback / Transfer button, this
button displays the settings menu in any camera mode. It also dismisses the
menu display.

Display Button: Centered beneath the LCD monitor and to the left
of the Menu button, this button controls the LCD display mode, in both Record
and Playback modes. In Manual or Auto Record mode, pressing this button once
cancels the information display. A second press dismisses the display entirely.
Pressing it a third time restores the original viewfinder display with information
overlay. In Playback mode, this button simply toggles the information overlay
on and off.

Erase Button: Directly beneath the lower left corner of the LCD monitor,
this button pulls up the Erase menu while in Playback mode.

Batt Open Button: In the center of the battery compartment door, on the
bottom of the camera, this button unlocks the compartment door so that it
can slide forward and open.
Camera Modes and Menus
Setup
Mode: The following Setup menu automatically appears whenever the Mode dial
is turned to the "Setup" position:
- Welcome Screen: Disables the welcome screen that appears at startup, or lets you designate a previously-shot image as the welcome screen.
- Language: Changes the menu language to German, English, French, Japanese, or Spanish.
- Date: Sets the camera's internal clock and calendar.
- Brightness: Adjusts the brightness of the LCD display.
- Volume: Turns the camera speaker on or off.
- Auto Off: Enables the Auto Off feature, which automatically shuts down the camera after a period of inactivity, to save battery life. Times are 30 seconds, or 1, 5, or 30 minutes.
- CF Card Format: Formats the CompactFlash card, erasing all files (even protected ones).
- USB: Sets the USB protocol to Mass Storage or PTP. The PTP option is best for Windows XP and Mac OS X systems (unless you want to mount the camera on the desktop), while Mass Storage is best for older operating systems.
- Video Mode: Sets the video output to NTSC or PAL timing.
- Reset All: Resets all camera settings to their defaults.
Movie
Mode: This mode is denoted by a movie camera icon on the Mode dial. Movie
mode captures moving images (without sound) at 15 frames per second (except
for Sepia Movie) for as long as the memory card has available space. Pressing
the Menu button pulls up a resolution menu, with options for Small Movie (320
x 240 pixels), TV Movie (interlaced 640 x 480 pixels), B/W Movie (320 x 240
pixels), and Sepia Movie (320 x 240 pixels at 5 frames per second).
Manual
Record Mode: This mode is marked on the Mode dial with a black camera
icon and the letter "M." Aperture and shutter speed remain under automatic
control here, but the Shooting menu offers the following options:
- Image Size and Quality: Sets the image resolution and compression
level. Choices are 3M High (2,048 x 1,536 pixels with 1:4 compression), 3M
Normal (2,048 x 1,536 pixels with 1:8 compression), 2M Normal (1,600 x 1,200
pixels, 1:8), PC screen (1,024 x 768 pixels, 1:8), and TV screen (640 x 480
pixels, 1:8).
- White Balance: Adjusts the overall color balance of the
image. Options are Auto, Preset (manual adjustment), Daylight, Incandescent,
Fluorescent, Cloudy, and Speedlight.
- Exposure Compensation: Increases or decreases exposure
from -2 to +2 EV, in one-third-step increments.
- Date Imprint: Activates (or deactivates) a date overlay
that appears over the image with an option to include the time, too.
- Continuous: Accesses the camera's drive modes, which include
Single, Continuous, Multi-Shot 16, and Multi-Shot 16-2.
- Best Shot Selector: Turns the Best Shot Selector mode on
or off. When enabled, the camera picks the least blurry image from a series.
This is helpful when you have to hand-hold the camera at slow shutter speeds.
The camera will select the sharpest image from a series of images taken when
you hold down the shutter button.
- Image Sharpening: Controls the amount of in-camera sharpening applied
to images. Choices are Auto, High, Normal, Low, or Off.
- CF Card Format: Formats the CompactFlash memory card, with
an option to cancel.
Auto
Record Mode: Activated by turning the Mode dial to the Auto position (green
camera icon), this mode places the camera in control of both aperture and shutter
speed, as well as most other exposure features. Pressing the Menu button displays
a limited Shooting menu.
- Image Size and Quality: Sets the image resolution and compression level. Choices are 3M High (2,048 x 1,536 pixels), 3M Normal (2,048 x 1,536 pixels), 2M Normal (1,600 x 1,200 pixels), PC (1,024 x 768 pixels), and TV (640 x 480 pixels).
- Exposure Compensation: Increases or decreases exposure from -2 to +2 EV, in one-third-step increments.
- Date Imprint: Activates (or deactivates) a date overlay that's applied to each image as it's captured.
- CF Card Format: Formats the CompactFlash memory card, with an option to back out.
Scene
Mode: Designated by the word "Scene" on the Mode dial, this
mode offers 10 preset shooting modes for specific shooting situations. Pressing
the Menu button calls up the Scene selection menu, with options for Party/Indoor,
Beach/Snow, Sunset, Dusk/Dawn, Night Landscape, Close Up, Museum, Fireworks
Show, Copy, and Back Light modes. Pressing the left arrow key while in the Scene
Assistance pulls up a menu selection screen, letting you choose between the
Shooting menu described above and the Scene Assistance menu.
Portrait
Assist Mode: Labeled on the Mode dial with a woman in a hat, this mode is
best for portraits, and is the first of the camera's Framing Assist modes. In
Portrait mode, the camera uses a larger aperture setting to decrease the depth
of field, producing a sharply focused subject in front of a slightly blurred
background. Pressing the Menu button calls up the Scene Assistance menu, which
lets you choose from a range of portrait setups, including basic Portrait, Portrait
Left, Portrait Right, Portrait Close-up, Portrait Couple, and Portrait Figure.
In each of these modes (except basic Portrait), an outline appears on the LCD
display to help you align the subject. Just as in Scene mode, pressing the left
arrow key while in the Scene Assistance menu provides access to the main Shooting
menu.
Landscape
Assist Mode: A mountain scene distinguishes Landscape mode on the Mode
dial. Here, the camera employs a smaller aperture setting to produce sharp detail
in both foreground and background objects. As with Portrait mode, the Scene
Assistance menu offers a handful of options (accessed as in Portrait mode).
Framing options are Landscape (no guidelines), Scenic View (mountain outline),
Architecture (grid), Group Right (outlines of people), and Group Left (also
outlines of people).
Sports
Assist Mode: A figure in action is the icon for Sports mode, which
uses faster shutter speeds to freeze action. The Menu button accesses the Scene
Assistance menu, with options for Sports, Sport Spectator, and Sport Composite
modes. Sport Spectator enables the user to instantly press down on the Shutter
button without pausing halfway to focus, and works best with unpredictable subjects
within a range of 9.8 feet (3.0 meters). Sport Composite mode takes 16 images
in two seconds, each time the Shutter button is pressed, and arranges them in
a four-by-four array, much like Multi-Shot 16 mode. As with Landscape and Portrait
modes, pressing the left arrow key while in the Scene Assistance menu provides
access to the main Shooting menu.
Night
Portrait Assist Mode: Indicated by an icon of a person in front of a star,
this mode is for twilight and dusk portraits. The flash is automatically set
to Auto Red-Eye Reduction mode, and syncs to the slower shutter speed, which
allows more ambient light in to balance color and shadows. The camera's ISO
setting automatically adjusts as high as ISO 800, depending on the light level
(not reported on the LCD screen). The Scene Assistance menu offers the same
framing outlines as in Portrait mode, with the same access to the Shooting menu.
Playback
Mode: Pressing the Playback button on the camera's back panel instantly
enters Playback mode. Here, you can review captured images and movies, erase,
enlarge, copy, and protect images, and also set them up for printing. Pressing
the Menu button offers the following options:
Playback
Menu
- Print Set: Sets the DPOF settings for captured images. The "Print
Selected" option pulls up an index display, letting you mark individual
images for printing. Once images are marked, you can establish whether
any text is overlaid on the image (such as image information or the date
and time). You can also cancel print settings here.
- Slide Show: Automates a slide show of all still images on the
memory card. You can select either All Images or Selected Images to play
back, as well as enable a loop.
- Delete: Erases selected images from the memory card, or all images
(except for write-protected ones).
- Protect: Write-protects individual images from accidental erasure
or manipulation. An index display of the images on the card appears, letting
you scroll through and select images to be "locked." Protected
images are only deleted through card formatting.
- Auto Transfer: Marks all images for auto transfer, which transfers
images to a computer instantly when connected.
Picture
Enhance Menu
- Pic. Enhance Menu: Offers a selection of special effects
filters. Options are Halo, Monochrome, and Sepia.
- Small Pic.: Creates a 640 x 480-, 320 x 240-, or 160
x 120-pixel copy of the currently displayed image.
- Photo Trim: Lets you crop the image and save a copy,
using the arrow and zoom keys.
Specifications
See camera specifications here.
Picky Details
Cycle times, shutter lag, battery life, etc. can be found here.
User Reviews
Test
Results
In keeping with my standard test policy, the comments given here summarize
only my key findings. For a full commentary on each of the test images,
see the Coolpix 3100's "pictures" page.
As with all Imaging Resource product tests, I encourage you to let your
own eyes be the judge of how well the camera performed. Explore the images
on the pictures page, to see how3100's images compare
to other cameras you may be considering.
- Color: Overall, images from the Coolpix 3100 bears a
very strong "family resemblance" to those from the 2100 I reviewed
just prior to it. Like the 2100, the Coolpix 3100 produced really excellent
color throughout my testing. I noticed slight color casts with various white
balance settings (typically a bit green with Manual, a bit red with Auto),
but overall color was very good indeed. The camera handled pastel tones
as well as highly saturated ones nicely, though I did notice that strong
additive primary colors (intense red, green, and blue shades) were rendered
a bit oversaturated. Skin tones were particularly good. Even the very difficult
blue flowers of the outdoor and indoor portraits came out very good, only
slightly darker than in real life. (Most digicams have problems with this
particular blue.) The camera also turned in a much better than average performance
under the very difficult incandescent lighting of my "indoor portrait"
shot. Overall, excellent color, much better than I was expecting to find
in a more or less "entry level" camera.
- Exposure: The 3100 exposed most of the test shots quite
well, even the very high-key outdoor portrait (although it did require two
notches of positive exposure compensation, in line with other cameras I've
tested). Shots with the camera's flash were quite dim though, and required
a fair amount of positive exposure compensation to get a reasonable exposure.
(As with the 2100, flash power is the one real Achilles' heel of the 3100.)
The flash also didn't match the hue of the incandescent room lighting in
the Indoor Portrait test. On my "Davebox" test, the 3100 had no
trouble distinguishing the subtle pastel tones on the Q60 target, while
still holding moderate detail in the deep shadows, with low noise.
- Resolution/Sharpness: The 3100 turned in an average
performance for its 3.2-megapixel class on the "laboratory" resolution
test chart. It started showing artifacts in the test patterns at resolutions
as low as 600 lines per picture height, in both horizontal and vertical
directions. I found "strong detail" out to at least 1,000 lines.
(Perhaps 1,050 lines horizontally, a bit less than 1,000 lines vertically.)
"Extinction" of the target patterns occurred around 1,200 lines.
- Closeups: Like most Nikon digicams, the 3100 performed
very well in the macro category, capturing minimum area of only 1.99 x 1.50
inches (51 x 38 millimeters). Resolution was high, with excellent detail
in the dollar bill. The coin and brooch details are a bit soft, likely due
to the shallow depth of field that resulted from the very close shooting
range. There was more softness in the corners of this shot than in ones
of more distant subjects, visible in all four corners. (This is a pretty
typical issue with super closeups on most digicams I've tested.) The 3100's
flash had trouble throttling down for the macro area, however, and overexposed
the shot.
- Night Shots: Because the 3100's Night Scene mode fixes
focus at infinity and forces the flash on, I shot this test in the normal
Manual exposure mode. In my testing, the camera produced clear, bright,
usable images down to the 1/4 foot-candle (2.7 lux) light level. The target
was visible as low as 1/16 foot-candles (0.67 lux), but quite dim. Since
average city street lighting equates to about one foot-candle, the 3100
should perform well at slightly lower light levels. Color balance was slightly
warm from the Auto white balance setting, and noise was moderate. (The camera
apparently automatically adjusts its ISO up to 400 for low light shooting,
providing the good capability in this area, but increasing the image noise
somewhat in the process.) As is commonly the case in digicams with CCDs
of the same physical size, the higher-resolution camera shows more noise
than the lower-resolution one. This proved to be the case with the 3100,
as it showed about 50% greater noise in the low light shots than did the
2100. The noise level will probably still be acceptable to most consumers,
but it's a factor to note if you personally find image noise particularly
objectionable.
- Viewfinder Accuracy: The 3100's optical viewfinder is
a little tight, showing approximately 86 percent of the frame at wide angle,
and approximately 85 percent at telephoto. This is a very typical performance
among consumer digicams, but I still would strongly prefer to see the viewfinders
show more of the final field of view. The LCD monitor fared much better,
showing approximately 95 percent at wide angle and about 97 percent at telephoto.
Given that I like LCD monitors to be as close to 100 percent accuracy as
possible, the 3100 performed fairly well here.
- Optical Distortion: Optical distortion on the 3100 is
rather high at the wide-angle end of its zoom range, where I measured approximately
0.9 percent barrel distortion. The telephoto end fared much better, as I
measured only 0.2 percent pincushion distortion (about three pixels). Chromatic
aberration (CA) is pretty good though. The color extends for five or six
pixels on either side of the target lines in the corners of the res target
image, but that's mostly due to the softness there, not to the CA itself.
- The amount of color is fairly low, so CA shouldn't be too visible in photos.
(This distortion is visible as a very slight colored fringe around the objects
at the edges of the field of view on the resolution target.)
- Battery Life: The Coolpix 3100's battery life is slightly
better than average for a compact digicam, with a projected runtime of 83
minutes in its worst-case power drain mode, and something on the order of
4 days (!) of run time in capture mode with the LCD screen turned off. The
extremely low power drain with the LCD turned off is particularly welcome,
although the 3100's optical viewfinder isn't accurate enough to rely on
it for critical framing. (Not to preach too much about it, but I really
feel that consumer digicams should have optical viewfinders with 90-95%
frame coverage, rather than the 85% or so that's typical.) As always, I
highly recommend picking up a couple of sets of high-capacity rechargeable
batteries, and keeping a spare set freshly charged at all times. Click here
to read my "battery shootout" page to see which batteries currently
on the market are best, or here
for my review of the Maha C-204F charger, my longtime favorite.
In the Box
The Coolpix 3100 ships with the following items in the box:
- Coolpix 3100 digital camera.
- Wrist strap.
- 16MB Lexar CompactFlash card.
- Video cable.
- USB cable.
- Two single-use AA alkaline batteries.
- CD-ROM loaded with Nikon View software and drivers.
- Instruction manual and registration kit.
Recommended Accessories
- Larger capacity CompactFlash card (at least 32MB, 64MB preferred).
- AC Adapter.
- Two sets of rechargeable AA batteries and charger. (Click here to read about the recommended charger, or here to read my "shootout" of NiMH rechargeable batteries.)
- Small camera case for outdoor protection.
Recommended Software: Rescue your images!
Just as important as an extra memory card is a tool to rescue your images when
one of your cards fails at some point in the future. I get a lot of email from
readers who've lost photos due to a corrupted memory card. Memory card corruption
can happen with any card type and any camera manufacturer, nobody's immune.
A surprising number of "lost" images can be recovered with an inexpensive,
easy to use piece of software though. Given the amount of email I've gotten
on the topic, I now include this paragraph in all my digicam reviews. The program
you need is called PhotoRescue, by DataRescue SA. Read our review of it if you'd like, but download the program now,
so you'll have it. It doesn't cost a penny until you need it, and even then
it's only $29, with a money back guarantee. So download PhotoRescue for
Windows or PhotoRescue for
Mac while you're thinking of it. (While you're at it, download the PDF
manual and quickstart
guide as well.) Stash the file in a safe place and it'll be there when you need
it. Trust me, needing this is not a matter of if, but when... PhotoRescue
is about the best and easiest tool for recovering digital photos I've seen.
(Disclosure: IR gets a small commission from sales of the product, but I'd highly
recommend the program even if we didn't.) OK, now back to our regularly
scheduled review...
Conclusion
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Nikon's Coolpix line of consumer digicams has always been well-received, appreciated
for their high image quality and ease of use. From the sharp Nikon optics to
the full range of exposure control, the Coolpix series has satisfied a wide
range of users. The Coolpix 3100 follows this trend, with its 3x Nikkor lens
(with great macro capabilities), 3.2-megapixel CCD, and well-rounded offering
of preset shooting modes. As in the earlier 885 and 775 models, Nikon continues
to extend the Coolpix line toward the novice user. In the 3100, this focus is
expressed in the new Framing Assist modes, providing nearly infallible framing
and exposure for entry-level users. Compact and very travel-worthy, the Coolpix
3100 is an extremely flexible point-and-shoot camera, with just enough features
to produce great images with little hassle. Best of all, the 3100's image quality
lives up to both the Nikon name and the excellent assortment of features it
offers. All in all, the Coolpix 3100 looks like an excellent option for entry-level
users looking for a camera that'll help them snap great-looking photos under
what would otherwise be challenging conditions. Highly recommended!
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