A number of Canon “L” series lenses are specially weather sealed, using ‘O’-rings and gaskets to keep out water and dust.
- Canon EF 16-35mm f/2.8L II USM
- Canon EF 17-40mm f/4L USM
- Canon EF 24-70mm f/2.8L USM
- Canon EF 24-105mm f/4L IS USM
- Canon EF 28-300mm f/3.5-5.6L IS USM
- Canon EF 70-200mm f/4L IS USM
- Canon EF 70-200mm f/2.8L IS USM
- Canon EF 14mm f/2.8L II USM
- Canon EF 24mm f/1.4L II USM
- Canon EF 50 f/1.2L USM
- Canon EF 200 f/2L IS USM
- Canon EF 300mm f/2.8L IS USM
- Canon EF 400mm f/2.8L IS USM
- Canon EF 400mm f/4DO IS USM
- Canon EF 500mm f/4L IS USM
- Canon EF 600mm f/4L IS USM
- Canon EF 800mm f/5.6L IS USM
- Canon Extender EF 1.4x II
- Canon Extender EF 2x II
佳能在部分超远摄镜头及L型变焦镜头的镜头接口部位采用橡胶垫圈等防水滴防尘的高性能结构，在EF 300mm f/2.8L IS USM等超远摄系列以及L型的变焦镜头中，佳能采用了在镜头接口部位增加能堵塞与相机机身之间缝隙的橡胶垫圈的防水滴防尘结构；并在对焦环、焦点预设播放 环等可动部位也采取相应的防水滴防尘措施。此外，相机的操控面板以及背面的插装滤镜插槽的接口也使用了橡胶材料，提高了相机细节部分的防水滴防尘性能。对于EF 24-70mm f/2.8L USM等镜头，在变焦环以及焦距拉放部位也采用了防水滴防尘结构。
- Canon EF 16-35mm f/2.8L II USM
- Canon EF 17-40mm f/4L USM
- Canon EF 24-70mm f/2.8L USM
- Canon EF 24-105mm f/4L IS USM
- Canon EF 28-300mm f/3.5-5.6L IS USM
- Canon EF 70-200mm f/4L IS USM
- Canon EF 70-200mm f/2.8L IS USM
- Canon EF 14mm f/2.8L II USM
- Canon EF 24mm f/1.4L II USM
- Canon EF 50 f/1.2L USM
- Canon EF 200 f/2L IS USM
- Canon EF 300mm f/2.8L IS USM
- Canon EF 400mm f/2.8L IS USM
- Canon EF 400mm f/4DO IS USM
- Canon EF 500mm f/4L IS USM
- Canon EF 600mm f/4L IS USM
- Canon EF 800mm f/5.6L IS USM
- Canon Extender EF 1.4x II
- Canon Extender EF 2x II
- AF-S 14-24mm f/2.8G
- AF-S 24-70mm f/2.8G ED
- AF-S 400mm f/2.8G ED VR
- AF-S 500mm f/4G ED VR
- AF-S 600mm f/4G ED VR
Rugged construction with professional-grade dust and moisture resistance.
- AF-S尼克尔14-24mm f/2.8G
- AF-S尼克尔24-70mm f/2.8G ED
- AF-S尼克尔400mm f/2.8G ED VR
- AF-S尼克尔500mm f/4G ED VR
- AF-S尼克尔600mm f/4G ED VR
按照尼康专业 D-SLR 标准设计，从而有效地防尘和防潮
When browsing picture shot by camera in Picasa, you can check the exif information of the picture, Picasa can caculates the equivalent focus length in 35mm lens, but this function is not friendly to Canon picture, the real focus length can be shown correct, but the equivalent focus length is not. Whether the Canon camera is full frame or not. Picasa should make it better. Furthermore Picasa cant show the raw picture shot by 5D markⅡ.
The version of Picasa is 3.1.0.
Google的Picasa中浏览照片时，可以显示照片的exif信息，并对非135的相机的焦距换算为35mm镜头的焦距，不过对Canon的支持不好，不论是否全幅的相机拍的照片，实际焦距显示正常，可是换算的焦距不对，希望Picasa改进，并且Canon的5D markⅡ拍的raw照片也无法在Picasa中显示。
Picasa的版本未3.1.0.
像佳能有红圈的L镜头一样，尼康也有自己的金圈镜头。这些镜头光学性能优异。不过一些非常好镜头并没有金圈，因为是老镜头，而那时尼康还没有开始用金圈这一标记。尼康的金圈镜头有：
- AF-S尼克尔24mm f/1.4G ED
- AF-S尼克尔16-35mm f/4G ED VR
- AF DX 10.5mm f/2.8G ED
- AF-S DX 12-24mm f/4G IF-ED
- AF-S DX 17-55mm f/2.8G IF-ED
- AF-S 14-24mm f/2.8G ED
- AF-S 17-35mm f/2.8D IF-ED
- AF-S 24-70mm f/2.8G ED
- AF-S VR 70-200mm f/2.8G IF-ED
- AF VR 80-400mm f/4.5-5.6D ED
- AF-S VR 200-400mm f/4G IF-ED
- AF 14mm f/2.8D ED
- AF-S VR 200mm f/2G IF-ED
- AF-S VR 300mm f/2.8G IF-ED
- AF-S 300mm f/4D IF-ED
- AF-S 400mm f/2.8G ED VR
- AF-S 500mm f/4G ED VR
- AF-S 600mm f/4G ED VR
- AF-S VR 105mm f/2.8G IF-ED
- PC-E 24mm f/3.5D ED
- PC-E 45mm f/2.8D ED
- PC-E 85mm f/2.8D
Never used canon dslr, it is not enough only looking the handbook. I want to use it in body. There isn’t bestbuy in beijing, so I went to the canon experience store last week. When you come out of the northwest entrance of the Xidan station, walk to northwest, the store is near by the Juntai department store. On corner of a building, the 1st floor laying out the DC and DV. The dslr locates in 2nd floor. Telephoto lens with 1ds mark 3 and 1d mark 3 are on two tripods. Other dslrs are behind of the show window. Special men serve nearby. The id card is your guaranty for using the camera and lens. There is no memory card in the dslr, you can only check the photo you shot one by one. Next time I will take my card.
I used the 5D mark Ⅱ with 70-200/4 100-400 85L, the 70-200/4 is very portable, large difference with 100-400 and 70-200/2.8. It is no wonder many people choose 70-200/4 instead of 70-200/2.8. After a few minutes, I am familiar with the body of 5d, it is very nice for using.
- The C1~C3 mode is very convenience which can saves your different configuration. For example, C1 is set for portrait, F/2.0, portait picture style, Spot Metering. C2 is set for landscape, F/11, landscape picture style, matrix metering.
- The upper limit of auto ISO is ISO 3200 which cant be changed, I did not know how canon decide the lowest shutter speed, I did not notice this when using zoom lens, but when I using 85L, the lowest shutter speed is 1/80s, if you shot the darker, the ISO ascend. All lens is unified or being set of the reciprocal of the focus length?
- The area of spot metering is too large, when the person you shoot is far, the area is already larger than the person’s face.
以前没有摸过佳能的机器，对佳能单反的一些设定光看说明书是不行的，想实际用下，北京没有百思买，于是上周末去了北京的佳能体验店，西单地铁西北口出了接着西北走，在君太百货西面，在个角上，两层，一层是便携数码相机和摄像机，单反在二楼。两个三脚架的大炮后面分别是大马三和小马三，其它机身都在玻璃窗里，有专门的工作人员看管，需要用身份证抵押，然后就可以任意组合镜头和机身了，不过机身里都没有存储卡，只能拍完一张看一张。太失算了，自己帯张就好了。
先后试用了无敌兔加xxb、db、85L，xxb非常轻便，和db差异明显，难怪很多都用xxb顶替xb。用用也就对佳能机身熟悉了，与nikon的机身差异挺大，但是也很好用。
- 指令拨盘里的C1~C3用户自定义模型非常方便，可以把你常用的设定保存，比如C1设为拍人物特写，光圈F/2，照片样式为人像，点测光。C2设为风景，光圈F/11，样式为风景，矩阵测光。
- 自动ISO的上限为ISO3200，快门速度不知如何定的，开始用变焦时没注意，不过用85L时发现最低为1/80s，再暗就会自动提高ISO。是所有镜头按1/80还是自动取焦距的倒数呢？
- 点测面积太大，离人远时，点测面积已经比人脸大了。
