Period of use: 5 monthsStrengths:
Fast and accurate focus USM ring type
Full time manual focus
Bokeh creamy and calm
Color rendering nice and warm
No zoom creping in any position
Made in Japan
Price (my is as new no sign of use with UV filter and mounted on EOS 50 + remote RC-1 and all of that cost me about 85€) if you deduct average price of all other stuff that came with it I paid about 50€ for it and I call that a bargain.
It would be nice if filter and hood mount were made of metal.
Filter mount threads are plastic and can easily be destroyed if filter is screwed in in hurry.
Hood bayonet mount is also plastic and if it collects some dust hood installation may feel like you are forcing something the wrong way.
Solution to this problems are simple pay attention when mounting a filter and keep hood and hood bayonet clean.
Only real complaint is zoom ring stiffness but that may be do to lens age and lack of usage.
I'll rapport here if any changes to zoom stiffness appear after longer period of usage. (it occurred to me that stiffness is by design to avoid zoom creep)
Overall it is a really nice lens versatile light compact real dream for traveling.
I read a lot about how it is odd lens on crop body but let's be honest which one isn't it is not the lens that is odd it is the size of the sensor and the smaller angel of view. After some time it is second nature to recalculate field of view size and to anticipate how far you must be to fit all subjects in desired frame size. (FOV crop factor and focal length ar topic for another article )
Almost all lens shortcomings on crop body like 7D are lost do to small sensor and advanced features like peripheral illumination correction.(Owners of modern Canon's if not familiar with this option should read their user's manual) Minor optical distortions can be addressed during post processing through lens correction tools of different softwares like LightRoom Corel Aftershot (Bibble pro) and DXO optics.
There is a lot of reviews on the net and if you spend some time with Google you'll find all information you need to decide if it is a lens for you. eBay has an article about this lens and how to recognize it because first and second model differ in minor cosmetic details but difference in performance is great.
It is not the best lens but it is good enough for what I wanted it.