DSLR blurred picture disaster. need help.?

-hi, i have my canon 500d (18-200mm kit) for over 2 years now and so far it has done me well. however, lately i have noticed that especially in indoor condition eg. ballroom or lecture halls, the pictures that i took are not as sharp as they should be.

i take pictures of events and programs a lot and i have my handy speed lite (430EXII) with me all the time. before this the pictures were sharp and not flat (just what you might expect from a DSLR) however nowadays it isn't anymore. they look flat just like pictures taken with an ordinary cameras. i tried using a different lens (canon 50mm 1.8) and the pictures are also not as sharp.

please if anyone have any idea what might be the problem and the solutions for it i appreciate anyone who'd share his experience. thanks in advance.It can be 3 things



1) You are getting used to your picture quality...

Sol -> Leave your DSLR home and use a p&s camera..then compare the quality after 5-10 days..



2) Your camera image sensor is going gaga...

Sol -> 1st check how your camera performs in full daylight, evenings, without flash at low & high ISO

If the pic quality seems to be affected still then u need to hit a repair shop for some servicing work..



3) Maybe u changed some 'unknown setting' in your camera...

Sol -> See what happend with me..I use a Nikon though... I always click in Vivid color with 'shade' to give a warm red tone but one fine day some idiot changed my settings to Neutral... So after an event of around 50 something excellent pics, i see the pics are flat... i later realized what had happened...

There is a 'Reset option' somewhere hidden.. I am sorry idk where it is for your camera, but kenrockwell knows -- http://www.kenrockwell.com/canon/rebel-t鈥?/a> .. So do it...You might be using too wide an aperture. You need to remember that wider apertures will cause shallow depth of field, and if you are not focussing on someone's eyes for example, the image is going to look out of focus. There is a great temptation when working indoors to open up that aperture to try and get more light, but it's not always the best thing to do. Conversely, small apertures in excess of f16 can cause diffraction and loss of clarity in shots - unlikely to be a problem in indoor shots, but it can have a noticeable effect in landscapes. Then there is the problem of motion blur/camera shake. Even with a flash you may need to consider using a tripod. If you are shooting formal shots, you may need to ask people to stand still if there is a lack of light.