Photos losing resolution on export

[lissa15351]

I'm exporting photos from Lightroom and for one specific session when I export the dimensions are shrinking a toooon. The image is going from 5040x3360 to 2560x1707. I've checked my export settings and they're not set to resize anything. The kicker is it's ONLY the images from this session. I exported photos from a different session earlier in the day and the size didn't change at all. I even exported them at the same time and the one from this session changed size and the other one didn't.

[bhousto90]

From the dimensions you are getting for the exports it looks like you are using Smart Previews vs the original files.

[Rob_Cullen]

I agree with bhousto90​ .  Long edge of 2560 is the dimension of Smart Previews.