kmaslin

should have stated that was only looking at this for astrophotography so image can be quite dim (and using a Herschel wedge to cut out majority of sunlight If someone has used a 1nm filter would be interested to know if they see any structure (apart from sunspots)

Has anyone tried a 1nm filter? Aware they are not cheap >£500 with a supplier in US but wonder if significant improvement?

Reconsidered and will put them side by side

Oh should have said as well the mount is Ioptron CEM120 so can easily manage the overall weight - just wondering about strain on optics

Does anyone know what is the maximum weight of a 2nd scope that can be attached to the Celestron losmandy bar without distorting the main scope? Would a 10kg refractor have an effect?

Thanks but the standard fitting that cones with the RASA is 42mm and therefore covers up the guide camera. Therefore need a RASA fitting with minimum 48mm or better still 54mm - have googled but can't find one

Anyone figured how to fit large aperture adapter 48mm minimum (and where from?) to female 54mm thread on camera?

Will this 2600 Duo work with 8" RASA or is the guide chip outside the image frame?

Thanks guys for all the input Thankfully have found a more powerful PSU and it is working again 😁 Now will see if I can update the firmware and then test on the Vixen SXD mount to see if it works

tried swapping polarity - no change. Think it is dead....

Oh that is weird. I didn't have the original power supply but just used a spare 12V 2A unit I had knocking about Was chuffed when I first plugged it in and it fired up after 15+ years (don't think the unit was ever used) However after 3 or 4 times of testing it stopped - which means I might have fried it as am sure the normal PSU have +ve to central pin (confused that it did work?) Will try the other way around - nothing to lose...

Come across and old Vixen Sphinx SXD eq mount which had a Starbook 1 controller. This is over 15 years old and cant get the Starbook to work Could replace the Starbook 1 for a Starbook 10 but they are over £800! Has anyone managed to make a rig to control the Vixen mount? Otherwise can try to sell the mount for visual work only as can handle a big scope eg 50lb

IF do 2 versions of the on axis unit, one for aps sized sensors and one for full frame approx 50mm diagonal. As for video can't see why it doesn't work the same. Also most cmos sensors have very good ir sensitivity and usually needs to be cut off to stop star bloating. Oh and here is a fun article about clever multi-split imaging https://link.springer.com/article/10.1007/s12567-021-00418-9

Thanks Dan most informative. Still reviewing this as possible option as usually guiding is good for my SCT, but galaxy season can get hard work finding guide star. I use Starlight Xpress cameras as guide cameras as their QE etc is excellent compared to previous 120/178mm camera. Any more advice would welcome 😀

Has anyone got experience of on-axis guiding, especially the setup from Innovations Foresight? Not cheap but wonder how it compares with offaxis guiding when using bigger scopes/smaller fov where it is difficult to do multiple star guiding