[bluesilver (Peter)]

Hi, sorry for the confusing title there.
I am thinking about moving away from a Guide scope to an OAG
So i have a Esprit 150 with a ASI2600mc main imaging camera
I have a ASI290mm mini guide camera and an Orion 60mm Guide scope.

I was looking at swapping out the Orion guide scope with an ZWO OAG.

Now the question apart from if the two are compatible Esprit 150 and ZWO OAG,
Is the imaging / guiding ratio
So with my setup with the Orion Guide scope, my imaging / guiding ratio is 1:3.37

So when i go to an OAG and please correct me if i am off track here, the ASI290mm mini is now imaging through the Esprit 150, so the imaging / guiding ratio now changes to 1:0.77

I don't think this would be ideal, so would i be correct in saying that i would now have to bin the guide camera to say 4x4 to get the imaging / guiding ratio up to 1:3.09

Sorry for the confusing question, Been trying to do a bit of research in this and not too much luck yet.

Any advice would be appreciated.
Thanks.
Peter.