I’ve been trying to get an OAG working with my original ZWO 120mm mini, with very limited success - but it worked perfectly with a guidescope. Most other OAG users recommended the ZWO 174mm as THE guide camera of choice for an OAG, but I just couldn’t justify the price (over £400)

Luckily, ZWO have brought out the 220mm as a midrange camera to slot in between the 120 and the 174. Not quite as large a sensor as the 174, but a big increase on the 120. It seemed to have favourably reviews, so I took a chance and bought one.

Does it work? Yes. First time out, I have stars and good guiding, that I never had with my 120. Imaging on my StellaLyra RC8, I get sharper, more defined stars than I was getting using a guidescope, due to the more accurate tracking through the OAG, so I’m a very happy bunny

I’ve started using the Antlia OAG with integrated filter drawer and had originally begun with my existing 290 mini guide camera. However on some dimmer targets I couldn’t acquire a suitable guide star. So I purchased the 220 with its larger sensor to give more fov. This appears to have worked and it is now good to go. Sensitivity is really good, with near IR capability. Excellent service as always from FLO!

I bought this ASI220MM from FLO in Januarry when down sizing my portable imaging rig. I use Kstars/Indi/Ekos software. I paired it with a Willams optics 50mm guide scope. It worked fine as a guide camera. No issues at all.

This combination gives 4"/pixel.