\setupcaption[location=right, minwidth=.5\textwidth]
\define[4]\figureis{%
\placefigure{#2, Courtesy #3, photo no. #1\nocite[#4]{}}{\externalfigure[#1][maxheight=.7\paperheight, maxwidth=.5\paperwidth, minwidth=.5\paperwidth]}
}
#1 = filename, other variables are used for reference/credit details.
The problem is, somehow some images are inexplicably displayed very tiny on the page. I check the image file and they are not small, but somehow is rendered small with the code above.