ZWO Low Profile Adapter for Uncooled ASI Cameras & PST Solar Telescope
To reduce the back focus distance on all uncooled ZWO ASI cameras to approximately 5mm, use this 1.25" Low Profile Imaging Adapter. This enables focus to be attained on instruments, such as the Coronado PST, that have very short back focus distances. For use, simply unscrew and remove the existing cover and replace it by screwing in the new one.* This adapter features M59 thread diameter and 0.75 pitch.
*When you install the LPA, please make sure it is on a flat surface with the lens pointed upwards. If it is not in this orientation the glass that shields the sensor may fall out which can cause dust to get on the sensor.
Please Note: If you have an ASI174MM or MC, you will need an external 1.25" filter (sold separately) to protect the sensor when using the Low Profile Adapter, as the adapter will expose the sensor window due to the design of the camera's normal cover. We recommend the HPS 1.25" IR Blocking Filter (IRBF1) for this purpose, but any 1.25" clear glass, luminance or IR-block filter would work fine since you will be imaging with an H-Alpha telescope (PST) through this temporary window.
Dimensions & Specifications
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