It’s hard to escape the curse of large zoom. Aoba SP-800UZ sample analysis

IT168 Sample As one of the only two 30 light variable DC units currently available, the release of Olympus SP-800UZ has aroused the interest of many photography enthusiasts. The question that everyone is most concerned about with this super telephoto DC is: With such a large zoom ratio, can its imaging performance be satisfactory? Today, we will use a set of sample photos taken by the Japanese dc.watch website to illustrate the problem.

About Olympus SP-800UZ:

Olympus SP-800UZ is equipped with a lens with the world's largest zoom capability, which uses a structure of 15 lenses in 10 groups , the 35mm equivalent focal length is 28-840mm, the maximum aperture is F2.8-5.6, and the minimum focusing distance is only 1cm. In order to ensure image quality and stability under 30x optical zoom, Olympus also added an aspherical lens and up to 3 ED lenses to the lens, and provided CCD anti-shake function.

In addition to the lens, the core of the machine is a 1/2.33-inch 14-megapixel CCD with a sensitivity range of ISO50-3200 (expandable to ISO10000 at 3 million pixels), and it also Supports MPEG-4 video shooting at 1280~720/30fps, with independent video shooting buttons and HDMI interface. In addition, SP-800UZ also has built-in user guides for user operations, and supports a series of practical functions such as facial recognition, portrait optimization, shadow adjustment, artistic filters, and panoramic shooting.

In other aspects, the SP-800UZ is equipped with a 3-inch, 230,000-pixel 16:9 display. It does not provide an EVF viewfinder like similar products, so the size is controlled at 107.3?84.7? 73.4mm, and the weight is only 418g. The machine uses SD/SDHC as storage media and has built-in memory of up to 2GB. It is powered by LI-50B lithium-ion battery and supports USB interface charging function.

Basic image quality performance

Wide-angle end:

Shutter: 1/60 sec/Aperture: F5/Exposure compensation: +0.3EV/Sensitivity: ISO50 /White balance: Auto/Focal length: 4.9mm (equivalent to 28mm)

Telephoto end:

Shutter: 1/40 sec/Aperture: F5.6/Exposure compensation: + 0.3EV/Sensitivity: ISO100/White Balance: Auto/Focal Length: 147mm (equivalent to 840mm)

To be honest, just seeing these two photos can already rank the SP-800UZ’s image quality next The verdict is finalized. Even at the lowest ISO50, the picture is still not delicate enough, and there is a slight purple fringing problem. At the same time, a certain degree of digital sharpening can also be seen in the telephoto sample. In addition, the center sharpness of this lens at the wide-angle end is good, but the peripheral sharpness drops significantly, and the overall sharpness at the telephoto end drops very significantly compared to the wide-angle end.

Distortion test

Wide-angle end:

Shutter: 1/8 sec/Aperture: F2.8/Exposure compensation: 0EV/Sensitivity: ISO200/White Balance: Auto/Focal length: 4.9mm (equivalent to 28mm)

Telephoto end:

Shutter: 1/6 sec/Aperture: F5.6/Exposure compensation: 0EV/Sensitivity Angle: ISO400/White balance: Auto/Focal length: 147mm (equivalent to 840mm)

Although there is obvious barrel distortion at the wide-angle end, in terms of the degree of distortion, the SP with a 30x zoom magnification -800UZ is not serious. In addition, at the telephoto end, the pincushion distortion of the SP-800UZ is almost negligible. At the same time, I believe everyone has also seen another problem, that is, there seems to be some problems with the automatic white balance of the SP-800UZ. Fortunately, this problem is not obvious in subsequent samples.

Sensitivity

ISO50

ISO100

ISO200

ISO400

ISO800< /p>

ISO1600

ISO3200

As can be seen from the above sample, the noise control of SP-800UZ is pretty good below ISO200, but sharpness appears from ISO400 onwards. The problem of decline. At ISO800, the noise in the shadows begins to cause the loss of details, and 100% viewing at ISO1600 is no longer acceptable. In addition, at ISO3200, the SP-800UZ can only output 5-megapixel photos, and is not recommended except for special needs.

Special Effects

The following are several special effects provided by SP-800UZ:

Standard

Vivid

Pinhole

Fisheye

Sketch

More special effects samples:

Special effects: bright/shutter: 1/320 seconds/ Aperture: F5.7/Exposure compensation: 0EV/Sensitivity: ISO50/White balance: Auto/Focal length: 7.1mm (equivalent to 40mm)

Special effects: fisheye/Shutter: 1/80 sec/aperture : F5.7/Exposure compensation: 0EV/Sensitivity: ISO50/White balance: Auto/Focal length: 4.9mm (equivalent to 28mm)

Special effects: Vivid/Shutter: 1/50 sec/Aperture: F3 .6/Exposure compensation: 0EV/Sensitivity: ISO50/White balance: Auto/Focal length: 4.9mm (equivalent to 28mm)

Special effects: vivid/Shutter: 1/80 sec/Aperture: F4.9 /Exposure compensation: 0EV/Sensitivity: ISO50/White balance: Auto/Focal length: 13.2mm (equivalent to 75mm)

Special effects: Vivid/Shutter: 1/80 sec/Aperture: F4/Exposure compensation: 0EV/Sensitivity: ISO50/White balance: Auto/Focal length: 17.1mm (equivalent to 97mm)

Special effects: Sketch/Shutter: 1/200 sec/Aperture: F2.8/Exposure compensation: 0EV/ Sensitivity: ISO800/White balance: Auto/Focal length: 4.9mm (equivalent to 28mm)

Special effects: Pinhole/Shutter: 1/8 sec/Aperture: F3.1/Exposure compensation: 0EV/Sensitivity Degree: ISO125/White balance: Auto/Focal length: 6.3mm (equivalent to 36mm)

Macro sample

Shutter: 1/500 sec/Aperture: F5.6/Exposure compensation : +0.3EV/Sensitivity: ISO50/White balance: Auto/Focal length: 15.2mm (equivalent to 86mm)

Shutter: 1/50 sec/Aperture: F3.9/Exposure compensation: 0EV/Sensitivity Degree: ISO50/White balance: Auto/Focal length: 15.2mm (equivalent to 86mm)

Background blur effect

Background blur function is on

Background blur The function is turned off

Video shooting effect

Size: 48.2MB/Resolution: 1280?720/30fps/Format: mp4

More samples

Shutter: 1/50 sec/Aperture: F5.6/Exposure compensation: 0EV/Sensitivity: ISO50/White balance: Auto/Focal length: 147mm (equivalent to 840mm)

Shutter: 1 /100 seconds/Aperture: F5.6/Exposure compensation: +0.3EV/Sensitivity: ISO100/White balance: Auto/Focal length: 147mm (equivalent to 840mm)

Shutter: 1/160 seconds/Aperture : F5.6/Exposure compensation: 0EV/Sensitivity: ISO100/White balance: Auto/Focal length: 147mm (equivalent to 840mm)

Summary: I have seen the samples and explained the basic image quality After that, I no longer want to comment more on the image quality of SP-800UZ. I can only say that it has not escaped the law that the greater the zoom magnification, the lower the image quality.