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elmonte Jan 17, 2011 12:23 PM

Canon Rebel Xsi focus and sharpness problem
Just registered for this sight and am very impressed with the knowledge many of the members possess.
My sons bought me a Canon Rebel XSI about two years ago. They bought it as a package deal and it came with a Canon EF 50mm 1.8, a Sigma 28-70mm 2.8-4 zoom and a Sigma 70-300 4-5.6 zoom.
I have never really been satisfied with the sharpness of the shots I have been taking. The best quality shots are coming from the 50mm but I expected that. It doesn't seem to matter what mode I am shooting in. I seldom shoot in full auto.
I have a fair bit of experience with SLR photography and took thousands of photos before the digital age came into being. The problems I am having are not those of a novice.
My son is more knowledgeable of DSLR photography and suspects it may be the camera body.
I certainly am not looking to winning photo contests but would like to have better quality shots.
Any advise for me. Thanks in advance.

TCav Jan 17, 2011 12:52 PM

Can you post some examples of the kinds of photos you've not been happy with?

elmonte Jan 17, 2011 1:18 PM

Thanks for the reply.
Almost any type of shot is not what I would expect. Landscapes in plenty of light are not sharp as they should be. Still shots inside or out with a tripod do not come out very sharp. I have taken alot of shots of birds with the 70-300 sigma and even when I have had the camera very still I do not get the clarity.
The white balance of the camera is great.

frank-in-toronto Jan 17, 2011 1:30 PM

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Can you post one? and have you bumped up the in-camera contrast, saturation and sharpness settings? A few posters here and there claim to be using what sound like high settings: 5's and 6's even. I believe this is the settings screen for your camera:

TCav Jan 17, 2011 2:02 PM

Before we go delve into changing settings and the like, I'd like to point out that, though Sigma does make some excellent lenses, the lenses you mentioned don't fall into that catagory. The Sigma 28-70mm 2.8-4 zoom and 70-300 4-5.6 lenses are basic, consumer grade lenses that are often sold as a cheap two-lens set. Your expectations for them should not be high.

The 50/1.8 is a better lens, so any real comparison should be with photos you captured when using this lens.

I suggest that you might want to try birding again, but rent a better lens (something like the Canon 70-300mm f/4-5.6 IS, for instance) and see if your results improve.

elmonte Jan 17, 2011 4:21 PM

Thanks for the replies.
I will tryt some of the picture style setting suggested.
I have always suspected it is a lens problem.
What is the best way to post a photo?

elmonte Jan 17, 2011 5:17 PM

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Try this

frank-in-toronto Jan 17, 2011 5:31 PM

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Not so bad. ---Scene Capture Type = standard (0)--- Loaded into irfanview, click click and looks a lot better. not great but it is low resolution.

elmonte Jan 17, 2011 5:43 PM

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Interesting Frank. But hard to make a low quality photo high quality.
Try this.

Mark2009 Jan 17, 2011 6:06 PM

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The Xsi should give you some really nice photo's. As someone else posted, the lenses are what are going to give you that. Here are 2 of mine with an Xsi with the canon 55-250, not a real expensive lens, but works pretty well.

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