This is my favourite piece of equipment. This version allows up to M42 (T2) connections. I'm upgrading to the full frame version.
Your entire FOV is now available for finding a guide star, without needing a separate guide scope. No more differential flexure, or camera rotations.
With an on axis guider, a specially coated filter angled at 45 degrees bounces visible light to your camera, while allowing near infrared to pass through to a guide camera. Your main camera remains static, but you can adjust the position of the guide camera in X & Y using sliders.
https://www.innovationsforesight.com...s-guider-onag/
It also allows the use of real-time focusing software SharpLock.
I'm pulling my system apart tonight to take photos of the internals, so attached to this post right now is an external shot.
This has been rarely opened, and always kept in a humidity controlled observatory.
$950
Pick up in Eatons Hill, or I can deliver within 150km (or to Toowoomba). Shipping at buyers expense.