小乐

佳能D20防水相机评测 液晶屏幕效果出色

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发表于 2013/7/9 10:26:50| 收藏

[楼主]

  腾讯数码讯(Leon) 虽然三防相机已经是相当常见的产品,包括奥林巴斯、尼康、富士、索尼等主流大厂都会在每年更新旗下的系列机型。但令人奇怪的是,另一相机大厂佳能似乎一直对这个领域不感兴趣,旗下真正的第一款三防相机还要追溯到2009年的PowerShot D10,拥有一个独特的设计和稳定的画质表现,在当时获得了我们的强烈推荐。

  而在几年后,续作佳能PowerShot D20终于出现了,拥有极为鲜艳的机身颜色,玲珑的曲线机身似乎受到了热带鱼的启发。相比前作,该机的改进不仅仅是在外形设计上,还采用了新的CMOS传感器和5倍光学变焦镜头,以及更大更清晰的液晶屏幕和GPS、1080P视频等新功能。防护性方面,防水性能与前作一致,为10米;防跌落性能有所增强,从1.2米提升至1.5米。下面首先来看看佳能PowerShot D20的参数信息。

  参数亮点:

  · 1210万有效像素的BSI-CMOS传感器

  · F3.9-F4.8光圈、28-140mm的镜头(5X)

  · “智能IS光学影像稳定器”功能

  · 3.0英寸46万像素的液晶屏

  · 内置GPS记录功能

  · 10米防水,1.5米防震,-10C防冻

  · 1080/24P的视频拍摄

  虽然佳能PowerShot D20与前作拥有相同的图像分辨率,但是使用了背照式CMOS传感器,能够实现更好的低光拍摄表现。不过,F3.9-F4.8的镜头光圈范围似乎不太理想,不仅奥林巴斯TG-2以及宾得WG-3等同类机型。下面一起来看看该机的实际使用表现。

  外形设计及操作

  佳能PowerShot D20是由金属及高档塑料混合制成的紧凑型三防相机,相比前作它更加时尚,你可以看到机身左侧的弧线设计,与大多数四四方方的同类机型相比更具特色。另外,该机还拥有蓝色、银色和黄色可选(根据国家与地区不同可选颜色也不同)。得益于坚固的机身设计,佳能PowerShot D20可以实现10米水深下正常使用30分钟,如果你想要潜得更深,那么可以选择佳能的WP-DC45外壳,能够将最大深度提升至40米。作为三防相机,它也能够支持防尘、防冻以及1.5米的防摔功能,总得来说还是十分主流的。

 

佳能PowerShot D20屏幕及背面按键设计

  佳能PowerShot D20屏幕及背面按键设计

  佳能PowerShot D20的并不会在每次开机时提醒你检查舱门是否紧闭,但总得来说舱门锁扣十分紧密,并不会出现舱门意外打开的状况。相机的3英寸液晶具有良好的的清晰度,在室外也有不错的亮度表现;而在水下,D20的屏幕也足够明亮,可以清晰显示水下的景物。机身背面,右上角是一个拇指休息区域,还拥有按压式变焦杆,以及一个专用的短片录制按钮。用一只手拿着相机时,变焦感的位置会让操作十分尴尬,因为面积实在偏小。


  机身非常贴合手掌,但变焦杆的位置有点尴尬,也很容易与电源和播放按钮混淆


  侧面的舱门设计,虽然只有一层防护机制,但基本上不会意外打开

  最后需要注意的是,佳能PowerShot D20并没有内置LED灯,虽然这个功能在日常拍摄中基本不会用到,但是在昏暗的水下还是能够发挥作用的。不过,它配备了一个AF对焦灯,可以在水下实现更好的对焦效果。

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本帖最后编辑时间发表于 2013/7/9 10:26:50

小乐

2013/7/9 10:30:54

[沙发]

  拍摄模式及功能

 

  佳能PowerShot D20内置了智能自动模式(在32种场景模式中自动选择一个)、程序模式(可调整更多选项),以及众多的场景模式和特殊效果模式。另外,该机还拥有专用的视频按钮,可以在拍摄视频时选择拍摄模式、场景和特效。当到水下拍照时,PowerShot D20提供两个专用的拍摄模式(水下和水下广角),以及水下白平衡的预设。虽然相机支持GPS功能,但在潜水拍摄时似乎并不能正常工作。

微缩景观

  微缩景观效果,使汽车之类的东西看起来像玩具,从高处向下拍摄时效果最好

 

  流行色彩强化模式,突出你想要的色彩,其他部分为黑白

 

这张全景照片由五张组成,使用PS6软件进行拼贴,最终效果还不错

  目前主流的卡片相机都已经提供了“全景扫描”的功能,但佳能PowerShot D20依旧是使用了老式的拼贴方式,你需要逐一拍摄场景,然后通过电脑合成图像,使用起来不太方便。与大多数防水相机一样,该机没有提供手动拍摄模式,但支持自定义白平衡和曝光补偿。到白平衡,D20的亮点在于专门为水下拍摄提供了一组的白平衡模式。

 

  GPS功能

  在相对开阔的环境下,我们打开佳能PowerShot D20的GPS功能,冷启动耗费了约90秒时间,如果更换地点到高楼中间,该机则无法正确定位,最终我们放弃了测试。另外,正如预期一般,该机无法在水中启动GPS功能。

  佳能PowerShot D20与前作的另一个主要差别在于视频拍摄,D20可以录制最大1920×1080分辨率(24帧/秒)的视频内容,文件大小限制为4GB,或是连续拍摄15分钟。另外,也可以选择720P/30P或是VGA分辨率,时间限制分别为30分钟和60分钟。
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小乐

2013/7/9 10:39:07

[板凳]

  性能和图像质量

  无论你是拍摄好动的孩子,或是行动缓慢的海龟,你都会希望自己的相机拥有快速的响应速度,而佳能PowerShot D20 则能够在大约0.8秒内开机,这是一个相当不错的成绩。用户界面非常直观,更改设置也很方便快捷,只是删除照片需要较多的步骤,因为相机缺乏一个专门的按钮。

  在良好的照明,自动对焦性能是非常敏感的,基本上在半秒钟就可以完成对焦。不过在低光照条件,D20需要两秒钟以上才能锁定到主题。至于水下的对焦速度,虽然我们都是在良好的光线下进行拍摄,但是在不使用闪光灯的情况下,都需要两秒到四秒的对焦时间。连拍方面, D20可以以1.9 fps的速度持续拍摄,直到填满你的存储卡,性能尚可,但一些同类机型都提供了更快的连拍速度(但持续时间不是很长)。

  佳能PowerShot D20可以实现连续280张的照片拍摄,这个成绩在紧凑型相机中尚属主流,基本上可以满足一天的拍摄需求而无需充电。但需要注意的是,上述电池的寿命数是在GPS关闭的情况下,一旦打开GPS功能,电池寿命将大幅缩短,特别是在开启图像位置记录的功能时。

  在陆地上,佳能PowerShot D20的整体画质不错,稍高于同类相机,但是放大至100%后,会发现一些锐度不足的状况,当然该机的潜在用户群体不会这么纠结画质。相机的颜色饱和度令人赏心悦目,完美呈现了美丽的毛伊岛,照片虽然存在一些颗粒噪点,但换来的细节还是令人满意的。

 

  照片色彩丰富,但放大至100%会发现锐度不够高,图像偏软(ISO 100,F/8,1/250秒)

  但在高光度下,我们不能期待一个小尺寸传感器会带来多么深刻的画质,不过ISO 800至1600的图像仍然可用,但仅限于小画幅输出或是网页。

 

  ISO 1600拍摄夜景,画面对比度较高,但噪点十分明显(ISO 1600,F4.5,1/6秒)

 

  室内拍摄,放大之后会发现很多细节损失(ISO 1600,F/3.9,1/13秒)

  虽然大部分时间相机的曝光是准确的,但有时还是会出现色差状况,此时可以通过i-Contrast功能进行调节。如下图所示,未开启该功能时的样张存在明显的过曝现象,尤其是天空部分,开启后则能够获得曝光更加均衡的照片效果,类似于HDR功能。比如,i-Contrast功能的最低ISO值会提升至160,可能会增加照片的噪点。

 

  i-Contrast自动关闭(左)和i-Contrast自动开启(右)样张对比

 

  佳能PowerShot D20的抗红眼功能偏弱,相机内的功能无法消除

  水下拍摄方面,在水中浮潜时使用佳能PowerShot D20可以拍摄到清晰的照片,但与我们测试的大多数防水相机一样,水下拍摄的自动白平衡效果并不准确。不过通过PS软件中简单的 “自动色彩平衡”选项,就可以获得更好的效果。

 

  自动白平衡(左)和PS调整后(右)效果对比

  最后我们发现,佳能PowerShot D20与同类机型相比,水下拍摄时的最佳焦段为广角端,这是因为其F3.9-F4.8光圈的镜头所致。总得来说,该机的画质属于同类相机的中上水平,较好的颜色表现为相机加分,但镜头光圈偏小则不及奥林巴斯TG-2等F2.0的大光圈机型。
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小乐

2013/7/9 10:48:36

[地板]

图像质量对比(JPEG)

  我们在摄影工作室内、相同的环境光下分别使用佳能PowerShot D20、尼康AW110、松下TS5与索尼TX30四款三防相机拍摄同一个物体,并截取100%局部进行画质对比。可以看到,在低ISO情况下,PowerShot D20的照片稍微偏软,不及索尼及松下机型锐利;而在ISO 800时,细节逐渐被降噪功能所涂抹,所以建议不要使用ISO 800以上进行拍摄。

 

  佳能PowerShot D20(左)与尼康AW110(右)样张对比

 

  松下TS5(左)与索尼TX30(右)样张对比

  评测总结

  总得来说,佳能PowerShot D20是一款表现不错的三防相机,除了提供出色的防护功能之外,画质表现也比较主流,可以满足受众群体的需求。相对来说,它不会是我们拍摄低光照片的首选,但可以在潜水时发挥作用,基本上也是符合其产品定位的。

  优点:

  · 坚固耐用,风格独特的机身设计

  · 良好的照片质量

  · 自动场景选择,大量的特效

  · 液晶屏幕效果出色

  · 内置GPS功能

  · 可选水下外壳实现更深的潜水性能

  缺点:

  · 图片不够锐利

  · 镜头光圈较小

  · 水下偏色状况

  · GPS功能过于简单

  · 仍然没有“扫描全景”功能

  · 只能记录单声道声音

  来源:dpreview
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