Critique of the Canon Broad Angle Lens - The EF-S 10-22mm F three.five-four.5 USM I have just received my new Canon EF-S ten-22 ultra-vast angle lens. This is one particular of Canon's most well-known lens and is designed for the "crop sensor" series of DSLR. Far more on what a
randy jackson recent crop sensor is later on. My initial believed following a few of frames is "Wow, this is truly wide, it wraps about my block."
The issue of the day is why do I require a 10-22mm broad angle lens. I currently have a EF-S eighteen-55 zoom that arrived with Canon X1i digital camera. So what am I likely to do with that added 8mm of width for a extensive angle shot. That 8mm is like a football subject when I am shooting a landscape in the distance (properly perhaps not very a soccer discipline, but near).
There is a fantastic need for people of us that shoot landscapes for a vast angle lens. As you might observe in my landscapes I tend to shoot extremely wide shots with mountains or red rocks in the foreground and the horizon in the distance. I have been shooting most of my landscapes at 18mm with my kit lens on the T1i. That implies that I am shooting at 28.8mm in movie 35mm dimensions. This is simply because the T1i is a crop sensor digicam with a element 1.6x.
Now I have to describe the crop sensor stuff. Suffice to say that there are three ratios of crop sensors in the Canon line of cameras full sensor, 1.3x, and 1.6x. This refers to the ratio of the sensor (the personal computer chip that sees the image and translates it to digital). The complete sensor is the exact same dimension as the 35mm digicam of years prior. The two other ratios are, in influence, a subset of the complete sensor and the 35mm film size. For useful reasons this implies that the entire sensor would see the total soccer area, the one.3x sensor would see inside the 20 lawn lines and the one.six aspect would seize inside the 30 lawn lines. Now, you math majors out there do not hold me to the actual proportions, I am just making an attempt to illustrate the concept.
Right here is a listing demonstrating what Canon cameras have which sensor:
Canon EOS 1Ds, Mark II and II (Full Body)
Canon EOS 5D and 5D, Mark II (Entire Body)
Canon EOS 1D, Mark III,IV (1.3x Crop Body)
Canon Digital Rebel, T1i,XSi,XS (1.6x Crop Body)
Canon EOS 20D,30D,40D,50D,7D (1.6x Crop Body)
Now what does all this have to do with me seeking, needing, lusting right after a 10-22mm extensive angle? Now you know that this lens will match on my digicam (whew, that took a long time). You will also know that the 10mm, the widest of the wide angle, is truly a 16mm on my digicam in contrast to how it looks on a full frame digital camera. That is even now extremely good and will capture genuinely ranging views of people red rocks that I am so fond of.
What about the other characteristics of the lens? All the evaluations I have go through display it to be a extremely higher high quality "glass." Canon designates their prime-of-the-line lenses with the letter "L" in the description. Although the EF-S 10-22 f/3.5-four.five does not carry the "L" designation, the use of a few aspheric components and one particular SD factor is a common characteristic of a quality lens. My 1st initial pictures with the lens still left me with the impression of how distinct and sharp it is.
This has good quality optical parts and is not a "reduced-conclude, consumer kind lens". Some pundits have suggested that if it had not been an EF-S form lens, it might have obtained the "L" designation, but given that it will not fit on a pro stage DSLR (EOS 5D,1Ds series), Canon did not give it a "professional" L designation. In truth, no EF-S lenses have the "L" designation to date.
EF-S lenses, of class, are intended for use only with APS-C (one.6x) sensor Canon DSLRs and will currently only physically mount on the Digital Rebel series, and EOS 20D,30D,40D,50D 7D. The EF-S style allows the rear component to be nearer to the sensor then with EF lenses, enhancing picture good quality, particularly at the shortest focal lengths. The "S" in EF-S indicates "brief back again focus" and now you know why.
There are many technical good reasons that this lens is excellent for extensive shots and landscapes. The evaluations have demonstrated that it is quite sharp and really quick when auto focusing. On the negative side I will notice that, if you use this lens when looking at a person up near it will make them look like they are standing in the circus exhibit with the distorted mirrors. It is clearly created for those shots that are as wide as all outside.