Field flattener, Williams old one.
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Field flattener, Williams old one.
This is the first time of trying to use the flattener, not needing it on solar stuff...
Back focus diagrams are all well and good, but often don't include the telescope and where the focus tube is....
Geoff
I do what I do because I can, and because I want to.
It doesn't mean I know what I'm doing
- Altocumulus
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TSS Photo of the Day
Re: Field flattener, Williams old one.
back focus for the
In normal solar work the distance is assisted by use of a solar wedge or CaK module - so I can only roughly guess I'm achieving the correct distance.
How much does the focus tube have to be 'out' from its housing, when the
Geoff
I do what I do because I can, and because I want to.
It doesn't mean I know what I'm doing
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