Here is a quick post on how to create a digitally stitched panoramic image.
Open all of your RAW files in Adobe Camera Raw and double check to make sure that each image has the same color balance and same exposure (it doesn’t have to be perfect but set the exposure to taste.) It is best to take panoramic images in manual mode so the camera doesn’t switch the white balance and ISO in the middle of your sequence.
After you’ve opened your entire sequence in Photoshop, go to “File” __"Automate”__”Photomerge.
99% of the time I use Auto Layout.
Hit the “Add Open Files” button
Check “Blend Images Together,”
Check “Vignette Removal” if applicable
Check “Geometric Distortion Correction” if you’ve tried the above and there is parallax distortion.
Open & drink entire beer while Photoshop takes it sweet time.
Save as tiff
Reopen in Adobe Camera to crop & fix the horizon and whatever else you’d normally correct.