  Recent results from OKA setup concerning form factor studies in $K_{e3}$
decay are presented. About 5.25M events are selected for the analysis. The
linear and quadratic slopes for the decay formfactor $f_{+}(t)$ are measured:
$\lambda'_{+}=(26.1 \pm 0.35 \pm 0.28 )\times 10^{-3}$, $\lambda"_{+}=(1.91 \pm
0.19 \pm 0.14)\times 10^{-3}$. The scalar and tensor contributions are
compatible with zero. Several alternative parametrizations are tried: the Pole
fit parameter is found to be $M_V = 891 \pm 2.0$ MeV ; the parameter of the
Dispersive parametrization is measured to be $\Lambda_+ =(24.58 \pm 0.18)
\times 10^{-3}$. The presented results are considered as preliminary.
