What model Zwo Mini Guide Camera do I need for Guide Scope Orion 50mm?

Lukasz

What model Zwo Mini Guide Camera do I need for Guide Scope Orion 50mm? I have Quattro 250 ST Focal Length=800mm Diameter 200 and ZWO ASI 294MC Pro color cooled camera I also have ASIAIR Plus

Corsair

Hmm, when I put the details from Lukasz into here - https://astronomy.tools/calculators/guidescope_suitability - there doesn't seem to be much difference between using the ASI120mm mini and the ASI220mm mini.

Kevin_A why go for the ASI220mm mini in this case?

Kevin_A

Asi220mm mini

w7ay

Corsair there doesn't seem to be much difference between using the ASI120mm mini and the ASI220mm mini.

If you are going use multi-star guiding, there are many more important parameters than for single star guiding.

For one, you want really low read noise, so that you have sufficient dynamic range to include both bright and dim stars in the field. You also want the FOV to be as large as affordable. You want the frame rate to be as fast as possible. Etc, etc.

Chen

Kevin_A

Corsair the pixels in the 120mm are smaller which is better but the 220 has a bigger field of view and better noise and higher gain settings if required. They used to sell a 290 with smaller pixels but they have discontinued it.

Lukasz

My telescopes Focal Length is 800mm, I put the tube onto the mount in my room The Focal length is written on the Sky Watcher tube I didn't know my Focal Length before, but my Guide Scopes Orion is 50mm

The weather right now is not going to be good, I have to wait a bit

w7ay

Lukasz Focal Length before, but my Guide Scopes Orion is 50mm

That is not the focal length, it is the aperture of the OTA.

Chen

Lukasz

The Guide Camera ZWO ASI 220 MM MINI is very expensive hmm

Kevin_A

Lukasz then get a asi120mm mini. Lots of people get good results using this guide camera.