Converting .NEF to .JPG

andcoz's answer provided me with a good search term, i.e. just using

$ apt-cache search gallery

results in some packages matching the above criteria, e.g.

• bins
• igal2 - Nice looking film reel effect in gallery by default, scaling of original images is not the default (see --bigy), homepage and man page are missing some usage examples
• jigl
• lazygal - Themes are easy to change/adjust, instead of next/previous links small thumbnails (at the left/right), small/medium scaled views by default, --original creates links to the original files
• llgal
• photon - Optional slideshow feature via javascript, some scaling and link to original image available
• webmagick

(Under Ubuntu 10.04)

One way is to use pdflatex instead of convert.

You need in a extra file, which is here called image.tex:

\documentclass{article}
\usepackage[active,tightpage]{preview}
\usepackage{graphicx}
\PreviewMacro[{*[][]{}}]{\includegraphics}
\begin{document}
   \includegraphics{img.jpg}
\end{document}

Then run pdflatex image.tex to generate image.pdf.