# Setup

### Changing the tube length

<span style="color: rgb(52, 52, 52);">Do you want to use the</span><span style="white-space: pre-wrap;"> FlexiSpeed </span><span style="color: rgb(52, 52, 52);">guide scope as a finder</span><span style="white-space: pre-wrap;"> </span><span style="color: rgb(52, 52, 52);">or</span><span style="white-space: pre-wrap;"> </span><span style="color: rgb(52, 52, 52);">a</span><span style="white-space: pre-wrap;"> </span><span style="color: rgb(52, 52, 52);">small</span><span style="white-space: pre-wrap;"> </span><span style="color: rgb(52, 52, 52);">spotting scope? Then you have to</span><span style="white-space: pre-wrap;"> </span>**unscrew a tube segment or two.**<span style="white-space: pre-wrap;"> </span><span style="color: rgb(52, 52, 52);">That way you can work with a star diagonal or Amici prism and eyepiece. The segments are simply connected by an M48 \* 0.75mm thread.</span>

### <span style="color: rgb(52, 52, 52);">Attaching filters or a dew shield</span>

<span style="color: rgb(52, 52, 52);">The objective also has an</span><span style="white-space: pre-wrap;"> </span><span style="color: rgb(52, 52, 52);">M48 thread: you can screw in filters or use an M48 extension tube as a dew shield.</span>

### Using guide scope rings

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