4 of 6 people found the following review helpful
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This review is from: Datacolor SpyderLensCal SLC100 (Camera)
You spend a chunk of change on a DSLR and great prime lenses and get frustrated because your images aren't that sharp. For the cost of getting one lens calibrated you can DIY with this great tool. Yes, there are ways to do it for free with printed PDF and/or a ruler. But get one of these things and you can start charging your friends. :)
Seriously easy to use and a must have if you're serious about your equipment.