  We have investigated phenomenological aspects of kaon photoproduction in
three different extreme kinematics. The first kinematics of interest is the
threshold region. At the threshold we have investigated the convergence of kaon
photoproduction amplitude by expanding the square of the amplitude in terms of
the ratio $m_K/m$, where $m_K$ is the mass of kaon and $m$ is the averaged mass
of nucleon and $\Lambda$-hyperon. The amplitude is calculated from the
appropriate Feynman diagrams by using the pseudovector theory. The contact
diagram as a consequence of the PCAC hypothesis is also taken into account in
the amplitude. Our finding indicates that the convergence can be only achieved
if the amplitude was expanded up to at least $12^{\rm th}$ order. As a
consequence, applications of some theoretical calculations based on the
expansion the scattering amplitude, such as the Low Energy Theorem or Soft Kaon
Approximation, cannot be easily managed in kaon photoproduction. The second
kinematics is the forward region, where we could assume only $t$-channel
contributes to the process. Here we have investigated the effect of amplitude
expansion on the extraction of the coupling constants $g_{K^+\Lambda p}$ and
$g^V_{K_1^+\Lambda p}$. The last kinematics is the backward region, where we
have also assumed that only $u$-channel survives and we could extract the
leading coupling constants $g_{K^+\Lambda p} $ and $g_{K^+\Sigma^0 p}$.
