Baader Eyepiece Projection adapter OPFA-3 / for Celestron 2" SC-Thread
- OPFA III – lens sided connection: to connect onto 2" SC threads of all Celestron (and Meade) Schmidt-Cassegrain telescopes
- Delivery without projection eyepiece
- For imaging with digital and/or analog (D)SLR cameras with removable lens
- Consist of base version OPFA (single parts see OPFA IV) and additionally lens sided with 16mm super short Celestron/Meade adapter with 2" inner thread
Description
Each OPFA is a complete accessory set for focal photography and eyepiece projection (without projection eyepiece and without T-2-ring for the camera) with connection to the telescope, sliding focuser and 2 pieces of 40mm T-2 extension tubes. A suitable T-2-ring for your camera must be ordered separately.
Our OPFA projection systems can be set to be light-tight and bolt-tight, so nothing can wobble anymore. With additional T-2 extension tubes, even extreme projection scales can be achieved – even with CCD cameras!
Each eyepiece projection works in the same way, although there are some practical differences wheather the camera is used WITH or WITHOUT lens. When working with a (digital) SLR camera, the lens is usually removed, and the camera body is attached directly to the projection unit.
If the camera lens is integrated into the system, this is called afocal projection. This is the usual method when shooting with digital viewfinder cameras, where the lens can NOT be removed. For these cameras, we recommend the ADPS, which can be set to a short distance between eyepiece and camera lens. The following diagram shows the structure of the classic eyepiece projection with cameras, where the lens can be removed.
