Hello
I am the happy owner of an Askar 71F that I bought to send to Starfront observatories together with my old AM5, a ZWO off axis guider, filter wheel and 2600 MM Pro. I also ordered a ZWO CAA but I don't know when I will receive it due to the massive delays they seem to have with this equipment. So I will probably end up sending my rig in its current configuration and send the CAA later to Sarfront as soon as I receive it. My question is as follows: my current setup is around 55 mm back focus but when I will add the CAA, it will bring it to over 70 mm. I have enough travel space on the focuser to reach focus, but could it degrade the quality of the images ? I know it is a Petzval design, but the reviews I saw were all performed at around 55 mm. Did any of you ever tested it well beyond the 55 mm classical sweet spot ?
Best
Damien
I am the happy owner of an Askar 71F that I bought to send to Starfront observatories together with my old AM5, a ZWO off axis guider, filter wheel and 2600 MM Pro. I also ordered a ZWO CAA but I don't know when I will receive it due to the massive delays they seem to have with this equipment. So I will probably end up sending my rig in its current configuration and send the CAA later to Sarfront as soon as I receive it. My question is as follows: my current setup is around 55 mm back focus but when I will add the CAA, it will bring it to over 70 mm. I have enough travel space on the focuser to reach focus, but could it degrade the quality of the images ? I know it is a Petzval design, but the reviews I saw were all performed at around 55 mm. Did any of you ever tested it well beyond the 55 mm classical sweet spot ?
Best
Damien