Help choosing Guidescope

[stein]

Hi All,

I am looking for a guidescope/camera. 

I have following setup: Skywatcher GTI, canon 600d (Crop factor 1,6, pixel size 4.30µm ), my lens is a Sigma 150-600 mm plus a 1,4x converter. Maximum focal length in use would be therefore 600x1,4x1,6 = 1344mm. I am looking for an autoguider which will accomodate this focal length and eventually in the future be used in combination with a ln Asiair mini. What would you recommend?

Keeping the budget and weight low would be great, of course :-)

Thanks!

Best,

Steiner