blurry photos in twenty eleven child theme

Right now that image is 300px scaled up to the max width of your conent which is around 500px. Usually it won’t get that blurry, but in this case, your original uploaded image is VERY big, so it’s downsized to 300px and losed its clarity already.

Set a proper size of image when placing <img> tag into post.
https://codex.www.ads-software.com/Inserting_Images_into_Posts_and_Pages

Default sizes ( cropped upon upload ) can be set.
https://codex.www.ads-software.com/Settings_Media_Screen

If settings on sizes changed, it won’t effect images already uploaded, WP crops image upon upload only, use a plugin called “Regenerate Thumbnails” to resize them all when these settings changed.

Thank you!!!!! Problem fixed ??

Not really.

Right now you have this:

<img class="aligncenter size-full wp-image-236" alt="fromthehip" src="https://example.com/wp-content/uploads/2013/05/fromthehip4.jpg" width="3204" height="2316" />

Notice these classes:
size-full and width="3204" height="2316"

When done right, see first link in my first post, it should be:
size-large or size-medium with the w and h as set in media settings.

The “full” is too big in this case because your original uploaded image is VERY big, browser loads that big image just to be viewed in 500px width column.

This is wasting bandwidth.

To wrap it up in a few words, when inserting <img> into post content check on “medium” or “large”, not “full”.

Ok. Thanks for the follow-up. I think that it’s fixed now!