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Kodak Z712 IS

Reviewed July 2007

Test Photos

Introduction
Ergonomics
Characteristics
Image Quality
Interface & Software
Camera Views
Test Photos
Specifications
Our Opinion
PLEASE NOTE:

Here are a few images that accurately reflect the abilities of any given camera model. The images are altered only in terms of size and sharpness after reduction, and by the JPEG compression used. Unless otherwise mentioned, assume that any marbling or artifacts visible in the images are due to the compression required to display them here. We feel however, that they still faithfully represent the results we experienced.

STILL LIFE PHOTO

This subject is photographed in a room that has a mix of fluorescent and incandescent light, but which is not brightly lit. The camera's flash is used to add fill light. The backdrop is 1.95 m (6.5 ft) from the camera.

The built-in pop-up flash of the Z712 IS is powerful enough to help light the subject very evenly at 64 ISO, the lowest sensitivity of the camera.

The Program mode elects the camera's biggest aperture to maximize the light available to the CCD, and the result is a slightly soft focus image whose details are further softened by the compression — a touch over 10:1 — used to store the photo.

Photo Information
Format: JPEG Aperture: f 2.8
Exposure: Multi-segment Shutter Speed: 1/30 sec
Resolution: 3072 x 2304 Flash: On
Quality: Fine ISO: 64
File Size: 1.93 MB Focal Length: 36 mm (eq. 35 mm)

ZOOM PHOTO

Now we zoom in on the centre of the image above to gauge the sharpness of the image at the zoom's maximum setting. The camera remains at the same distance as in the preceding photo.

At the full telephoto magnification the zoom offers, the Z712 IS is able to capture a superb level of detail and applies a lower compression than with the wide angle shot — a ratio of 7:1 — revealing the sharpness of the lens at the telephoto end. The image is noise-free, sharp from edge to edge, and shows no pincushion distortion.

Photo Information
Format: JPEG Aperture: f4.8
Exp: Multi-segment Shutter Spd: 1/50 sec.
Res: 3072 x 2304 Flash: On
Quality: Fine ISO: 64
File Size: 2.82 MB Focal Lgth: 432 mm (eq. 35 mm)
Aperture: f8, shutter speed: 1/25 sec., 64 ISO.

MACRO PHOTO

The Macro mode of the Z712 IS can focus on a subject that is between 12 and 60 cm (4.7 to 23.7 inches) at the wide angle end, and 60 to 130 cm (23.4 to 51.2 inches) when the lens is at the telephoto end. Interestingly, while the wide end of the zoom captures a field of view of 11.7 cm (4.56 inches), the zoom can be used partially — up to the equivalent of 78 mm — while the camera remains at the same distance from the subject, making it possible to capture a field of view of 6.6 cm (2.57 inches).

Using the zoom to the 78 mm equivalent position offers therefore a double advantage, narrowing the field of view captured by the camera, but also avoiding the barrel distortion that can be seen in images captured at the wide end of the zoom and in macro mode.

BUILDING PHOTO

This image is our outdoor test. The architecture of the building, in particular the angled girders, immediately show the presence of jaggies. The shadowed entrance can also often reveal the quality of the exposure.

Unlike with macro subjects, with standard subjects, barrel distortion is usually not intrusive. Still, the image sharpness is a bit less at that focal length than it is throughout the rest of the zoom's range, and the soft focus can be reinforced by the use of the widest aperture, f2.8.

Seen on a monitor at 100%, a slight chromatic aberration can be seen under the edges of the building's beams in the high contrast areas.

The exposure, established by the default Multi metering, is excellent.

Photo Information
Format: JPEG Aperture: f2.8
Exposure: Multi-segment Shutter Speed: 1/640 sec.
Resolution: 3072 x 2304 Flash: Off
Quality: Fine ISO: 64
File Size: 2.71 MB Focal Length: 36 mm (eq. 35 mm)

ZOOM PHOTO

Zooming in on the entrance of the building, the shadowed entrance takes on a greater importance for the metering and can cause an overexposure of sections that are directly lit.

The 12X optically stabilized zoom is the only way a shot as sharp as this can be captured short of mounting a camera on a tripod. The stabilization system — set to Single mode since it is more effective than the Continuous mode — absorbs the involuntary movements of the photographer, allowing for a crisp image.

The metering yields an excellent exposure that avoids any overexposure of the very bright foreground.

Photo Information
Format: JPEG Aperture: f4.8
Exp: Multi-segment Shutter Spd: 1/160 sec.
Res: 3072 x 2304 Flash: Off
Quality: Fine ISO: 64
File Size: 1.53 MB Focal Lgth: 432 mm (eq. 35 mm)

 

NIGHT PHOTO

Since this camera is capable of long exposures, a photo taken at night is included here.

The Kodak Z712 IS has a maximum exposure time of 16 seconds. Set to the Manual mode, this exposure time is able to capture bright night time images, even at the lowest sensitivity of 64 ISO.

Aperture: f5.6; shutter speed: 16 sec., 64 ISO.

Moreover, since the user can increase the ISO value, sensitivities up to 400 ISO can be used, although there is a tendency for the image to take on a painting-like appearance once processed for noise.

The Kodak Z712 IS uses a dark frame noise reduction system, doubling the time required per exposure as the camera captures a second image with the same exposure time as the first, but without opening the shutter, so it can use the noise gathered over the course of the second exposure to subtract it from the first.

An aperture of f5.6 and an exposure time of 16 seconds is sufficient to capture a bright image of the distant waterfront of the city using the full power of the zoom.

As always with long-zoom cameras that are equipped with an optical or CCD stabilization system, the system must be turned off when the camera is mounted on a tripod.

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Introduction
Ergonomics
Characteristics
Image Quality
Interface & Software
Camera Views
Test Photos
Specifications
Our Opinion




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