Newbie question - Focal length

[Daniel Md]

I just started using Hugin, it works great.

I usually take a set of photos for landscape panoramas with my Pentax K20 using an 18-50mm zoom, set to 18mm.  When I load the resulting images into Hugin, the Focal length is usually reported as something else, e.g.20.402, although the Focal length multiplier is correctly reported as 1.5x. I have confirmed the 18mm focal length from the image metadata using other tools.

My question is should I correct the value displayed on the GUI?

[bugbear]

Focal length is "just a number" on the way to FOV, which is what REALLY matters.

Take a quick/rough 360 pano, let hugin work out the FOV, and take it from there.

Bugbear