For the beginners, they may looking for the budget telephoto lens for Canon DSLR in the market and 2 famous lens that people always discuss about are Sigma 70-300 APO DG Macro and Canon EFS 55-250 IS so I arranged my test in order to see how well they are.
The first section of my testing is image sharpness in comparison to two lenses. I tested my 2 lens at following focal length: 70 mm, 100 mm, 135 mm and 200 mm. There is no result at 250 mm because I lost my files. I used Canon EOS 400D mounted on my Tripod, Mantrotto 055XPROB with Ball head 486RC2 and I also used mirror lock up with a shutter release cable in order to get the sharpest images that each lens can produce.
For the last test, I tested Image Stabilizer (IS) of Canon EFS 55-250 IS. So you can see how good of IS of Canon EFS 55-250 IS is.
Ps, please click each image in order to enlarge each photo. All photos were saved for website at 70%. Therefore, the result is good for comparison between 2 lens.
First test, Image Quality, let’s get started at 70 mm of SIGMA 70-300 APO DG Macro. I have labels (A, B, C) at different locations (See the photo below).
70 mm of Canon EFS 55-250 IS is below
You can see that at 70 mm Canon EFS 55-250 IS gives you wider perspective than Sigma 70-300. Therefore, the test at 70 mm is not 100% apple to apple but I think it should be good enough for comparison.
At 135 mm, the perspective of both lenses is not different. F stop of Sigma 70-300 starts at F 4.5 but F stop of Canon EFS 55-250 IS starts at F 5 (See photo below).
At 135 mm, Canon EFS 55-250 IS gives better image quality at the edge than Sigma 70-300.
I use hand held to test the Image Stabilizer (IS). I used the focal length of 250 mm, F 20, shutter speed 1/50 sec which is equivalent to 4 stops compensation. This shows me that the IS of Canon EFS 55-250 IS is working excellent.
My friend used this lens for life photography and the Image Stabilizer (IS) worked very good. The shutter speed at 1/30 sec gives him the nice and acceptable sharp image.
According to my testing, the Canon EFS 55-250 IS gives slightly better image quality than Sigma 70-300. Moreover, Image Stabilizer (IS) of Canon EFS 55-250 IS works very good.
Any comments are welcome.