I have a lot of pictures (almost a full 4gb memory card) that I accidentally shot in Adobe RGB on my Sony SLT a35. Will Adobe RGB images look different or unrealistic if seen/displayed on a monitor (and not printed)? That is, if I'm not printing, should I bother to convert all of them? And is the a way to batch convert these images to SRGB ? I am using Adobe Photoshop CS2 and Sony's software, Windows 10. Thank you.
If you review the top answer to this question: How do color spaces like sRGB and Adobe RGB overlap? you will see that the sRGB color space is completely within the Adobe RGB color space. Therefore, there should be no issues with 'missing' or odd colors. However, it you are going to display on the web, most assume sRGB color profile, so it could look washed out, depending on whether color management is supported. To avoid these issues, its best to convert.
To do so in Photoshop, simply choose Edit> Convert to Profile. Change the destination space to sRGB. (I believe CS2 menus still look like this).
To do this via Batch, simply use Image Processor: File>Scripts>Image Processor. Select the item: 'Convert Profile to sRGB'.