# Astronomy;dobsonians;filterslides

**URL:** <https://boards.straightdope.com/t/astronomy-dobsonians-filterslides/589393>\
**Category:** Factual Questions\
**Created:** [July 18, 2011, 12:10am UTC](https://boards.straightdope.com/t/astronomy-dobsonians-filterslides/589393 "2011-07-18T00:10:59Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![ruffjack](https://avatars.discourse-cdn.com/v4/letter/r/f9ae1b/32.png) [@ruffjack](https://boards.straightdope.com/u/ruffjack)\
**Post date:** [July 18, 2011, 12:10am UTC](https://boards.straightdope.com/t/astronomy-dobsonians-filterslides/589393/1 "2011-07-18T00:10:59Z")

</div>

Can you add 3 or more inches to a dob telescope focuser or is there better options for visual-use filter changes on a 16 inch dobs?

---

<div class="post-metadata">

**Author:** ![billfish678](https://avatars.discourse-cdn.com/v4/letter/b/7bcc69/32.png) [@billfish678](https://boards.straightdope.com/u/billfish678)\
**Post date:** [July 18, 2011, 4:41pm UTC](https://boards.straightdope.com/t/astronomy-dobsonians-filterslides/589393/2 "2011-07-18T16:41:05Z")

</div>

Ruffjack.

Could you be a little more specific in the equipment you are trying to use and how you are trying to use it?