The Starfield 0.8x adjustable reducer and flattener makes finding the correct back focus simple and easy. Setting the adjustment achieving back focus is simple, and, if more adjustment is needed for fine-tuning all that is needed is a small twist. If you are using accessories such as filter wheels and rotators you can still dial in the required back focus.
Just add up the thickness of all the accessories, plus the distance to your sensor and subtract from distance on the table offered on the Starfield Optics website and then set the reducer to the number that is calculated.
Using a 1.5mm Allen key, loosen off the three screws a half turn and then unscrew the lock. Thread the reducer onto the focuser. A 2″ Filter can be added inside the reducer.
The Starfield Optics 0.8x Adjustable Reducer specifications include:
– Suitable for: Refractor telescopes from 102 mm to 155 mm aperture with focusers from 2.5″
– Telescope connection: M63x1 external thread
– Camera connection: M48x0.75 external thread
– Reduction factor: 0.8 x
– Lenses : 3 lenses with ED element
– Coating: Fully multicoated and internal blackening
– Working distance: variable (adjustable)
– Adjustment distance range : 0-17 mm step
You can learn more about the Starfield Optics 0.8x Adjustable Reducer here.
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