Sharpness of photos

avz10 · Posted: Fri Feb 25, 2011 2:40 am Post subject: Sharpness of photos

I have a Canon EOS 450D that I have used for more than a year with the 18 to 55 mm lens.I usually use the Av setting and the picture size is set on Large.

I normally finalize my photos with Photoshop, using levels as well as unsharp mask-( my settings approximately: Amount 200%; Radius 0.8-1.0 and Threshold 0. These adjustments give good results.
The sharpness on the camera is set quite high.

I bought a Sigma 28-300 and am a bit disappointed. The photos are not always sharp and when I correct them on Photoshop, the radius needs to be nearly 2. The image would then look good on the PC but too sharp on Facebook, where my son downloaded it to.

This one is the sharpest:

Any advice either with my Canon settings or additional help with PS (I have PS CS5 Extended)

hoogleman · Posted: Mon Mar 14, 2011 12:13 pm Post subject:

I can see what you mean I am not familiar with canons and not experienced enough to answer properly but if you have same camera settings as your other lense and a big difference is noticed I could only suggest that you put your jpeg settings up to jpeg fine so your files should be about 7 meg in size also maybe invest in a speedlight maybe as you have to stand further back the light could be lost you could try upping your iso to 400 or 600 and change to focus type spot metering if cannons have that or matrix but couldnt imagine that being a major result changer to be honest but just a suggestion to get the topic going sorry just opened up a bigger image and looks like you have slight motion blur so try changing your shutter speed but you will loose a lot of light if lighting is low hence speedlight

Just took a quick look at 1 pic in photoshop all though the quality will not show so much on here due to compression but all i did was open image photoshop cs5 >filter> sharpen>smart sharpen and play with sliders until your happy I know you dont want to do this with every image but if you get a good picture then it is a quick fix but a more advanced photographer should help you more for camera settings

Netaddict · Posted: Sat Mar 26, 2011 3:58 pm Post subject:

You are being unjust to your camera. Don't expect razor sharp flash photos. Take a shot in daylight and then look at the sharpness.

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