“Invalid JPEG marker” problem

My very dear friend Raelene sent me a file this morning that wouldn’t open on her Mac.  She was getting this annoying error: “Could not complete your request because and unknown or invalid JPEG marker type is found.” I’d love to blame this on...

The PNG delusion

Whenever I visit photographers’ websites, I’m often appalled at how slowly they load.  It’s a terrible first impression for a visitor to your site, and maybe catastrophic to your chances of snaring them as a customer.  I have a lovely fast cable...

About resolution

Digital image resolution can be a confusing issue, and there is a great deal of misinformation floating around. This is because there are two definitions for the term “Resolution”. Definition One: Pixel Dimensions The NUMBER of pixels in something. Usually...

Let’s cut Facebook some slack!

This article was last updated in January 2016. Everybody’s complaining It seems that everywhere I turn I see photographers complaining about the quality of their images when posted to Facebook. Yes, we all know that Facebook compresses our images, and yes, it...

The case for re-sampling

I know I’ve already got a “Myths” page, but this is the biggest myth of all, so it gets its own article! The Situation Very often, in discussions about printing, I read the advice: “Don’t resample your image. Just resize it to the correct...

The myths of digital imaging

The web is full of nonsense about various photographic matters. Most of it is evangelical rubbish, some of it is old-fashioned misinformation. Let’s clear up a few things … MYTH 1: Adobe RGB is for printing Oh boy, hasn’t this myth caused a lot of...