At the time I bought the camera I was in touch with people from QHY and they told me that there is no way to attach a RF lens to the QHY600, maybe this has changed in the mean time, you have to check this with QHY. --- Avalon EvoZero Mount QHYCCD600C@Sigma 135mm, f/2.8 QHY-5LII@WilliamOptions 50mm GuideScope Pegasus FocusCube2, Pegasus PowerBox v2Read More...