Evostar 72ED as guidescope?

[Pryce]

Hey yall,  after a discussion about my options for a grab and go setup I setteled on the Evostar 72ED. But I'm wondering if it can also be used as a guidescope for a bigger reflector. 

If it can,  would the ZWO ASI 120MM work in conjunction with the 72ED? 

[fifeskies]

That would work fine as a guidescope in the majority of setups.

Unless you use the diagonal it will probably need some extension tubes to reach focus.

 

(in this scope the guiding field is around 1/2 a degree, or diameter of full moon)

Here are a couple of simulations of the performance.

 

 

 

Edited August 31, 2020 by fifeskies

[Ken82]

7 hours ago, Pryce said:

Hey yall,  after a discussion about my options for a grab and go setup I setteled on the Evostar 72ED. But I'm wondering if it can also be used as a guidescope for a bigger reflector. 

If it can,  would the ZWO ASI 120MM work in conjunction with the 72ED? 

Perfect guide scope for me 👍

just found out where all those extensions are 😬 Been looking for them everywhere 😂

[Pryce]

3 hours ago, Ken82 said:

Perfect guide scope for me 👍

just found out where all those extensions are 😬 Been looking for them everywhere 😂

Oh you need that many spacers for focus? 

[Adam J]

11 hours ago, Pryce said:

Hey yall,  after a discussion about my options for a grab and go setup I setteled on the Evostar 72ED. But I'm wondering if it can also be used as a guidescope for a bigger reflector. 

If it can,  would the ZWO ASI 120MM work in conjunction with the 72ED? 

Depending on a great many other factors you may want to consider an off axis guider for work at long focal lengths.

Adam

[Ken82]

6 hours ago, Pryce said:

Oh you need that many spacers for focus? 

Yes that’s with asi 174