  The low-energy electromagnetic form factors of the $\Delta$(1232)-to-nucleon
transition are derived combining dispersion theory techniques and chiral
perturbation theory. The form factors are expressed in terms of the
well-understood pion vector form factor and pion-baryon scattering amplitudes.
Nucleon and Delta exchange terms and contact terms constitute the input for
these pion-baryon amplitudes. The framework is formulated for all form factors.
When comparing to experimental data in the spacelike region of $e^- N \to e^-
\Delta$ scattering, the focus lies on the numerically dominant magnetic dipole
transition form factor. Fitting two subtraction constants (one for the
scattering amplitude, one for the form factor) yields a very good description
of this dominant form factor up to photon virtualities of about 0.6 GeV. After
determining the subtraction constants in the spacelike region and at the photon
point, respectively, predictions for the timelike region of Dalitz decays
$\Delta \to N \, e^+ e^-$ are presented.
