I have just acquired my new Canon EF-S 10-22 ultra-broad angle lens. This is a single of Canon's most well-known lens and is intended for the "crop sensor" sequence of DSLR. A lot more on what http://www.pageblip.com/randy-jackson's-recent-critics-3186.html a crop sensor is later. My very first considered soon after a couple of frames is "Wow, this is really extensive, it wraps all around my block."The query of the day is why do I require a 10-22mm broad angle lens. I previously have a EF-S 18-55 zoom that came with Canon X1i digital camera. So what am I likely to do with that added 8mm of width for a broad angle shot. That 8mm is like a football subject when I am shooting a landscape in the distance (nicely perhaps not very a football field, but close).There is a great need for these of us that shoot landscapes for a extensive angle lens. As you may possibly recognize in my landscapes I are inclined to shoot quite vast 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 means that I am shooting at 28.8mm in film 35mm size. This is since the T1i is a crop sensor digicam with a element 1.6x.Now I have to explain the crop sensor stuff. Suffice to say that there are 3 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 pc chip that sees the picture and translates it to digital). The total sensor is the identical dimension as the 35mm digital camera of a long time past. The two other ratios are, in result, a subset of the full sensor and the 35mm movie measurement. For sensible reasons this means that the full sensor would see the whole football discipline, the 1.3x sensor would see within the twenty lawn lines and the one.6 issue would capture within the thirty yard lines. Now, you math majors out there do not hold me to the actual proportions, I am just making an attempt to illustrate the idea.Here is a record demonstrating what Canon cameras have which sensor:Canon EOS 1Ds, Mark II and II (Total Frame)Canon EOS 5D and 5D, Mark II (Full Frame)Canon EOS 1D, Mark III,IV (1.3x Crop Frame)Canon Digital Rebel, T1i,XSi,XS (1.6x Crop Frame)Canon EOS 20D,30D,40D,50D,7D (one.6x Crop Frame)Now what does all this have to do with me wanting, needing, lusting following a 10-22mm broad angle? Now you know that this lens will fit on my digital camera (whew, that took a long time). You will also know that the 10mm, the widest of the extensive angle, is actually a 16mm on my digital camera compared to how it seems on a complete frame digital camera. That is nevertheless extremely great and will capture really ranging views of people red rocks that I am so fond of.What about the other qualities of the lens? All the testimonials I have examine demonstrate it to be a really large high quality "glass." Canon designates their best-of-the-line lenses with the letter "L" in the description. Even though the EF-S 10-22 f/3.5-4.five does not carry the "L" designation, the use of 3 aspheric factors and a single SD aspect is a common characteristic of a high quality lens. My 1st 1st shots with the lens left me with the impression of how clear and sharp it is.This has top quality optical areas and is not a "very low-stop, consumer type lens". Some pundits have suggested that if it had not been an EF-S sort lens, it may well have obtained the "L" designation, but given that it will not match on a pro level DSLR (EOS 5D,1Ds sequence), Canon did not give it a "professional" L designation. In simple fact, no EF-S lenses have the "L" designation to date.EF-S lenses, of course, are created for use only with APS-Do (one.6x) sensor Canon DSLRs and will presently only bodily mount on the Digital Rebel series, and EOS 20D,30D,40D,50D 7D. The EF-S layout enables the rear component to be nearer to the sensor then with EF lenses, bettering image good quality, specially at the shortest focal lengths. The "S" in EF-S signifies "quick back again focus" and now you know why.There are many technical causes that this lens is good for broad pictures and landscapes. The reviews have demonstrated that it is extremely sharp and extremely rapidly when car concentrating. On the unfavorable facet I will notice that, if you use this lens when looking at a particular person up close it will make them look like they are standing in the circus exhibit with the distorted mirrors. It is clearly created for these pictures that are as wide as all outdoors.
