Just wanted to point out the concern about the field of the RASA scopes. I have the 11" version and the field is very flat (I've had up to a APS-C on it but it's rated for FF coverage). However, it wasn't this way straight out of the box - my collimation was off. If you receive a RASA and you notice that your collimation is off, do not try and collimate it yourself. It VOIDS Celestron's first 30 day collimation warranty. I simply took a video of my in/out star focus, and sent it to Celestrion. They immediately sent me a RGA label and it was shipped back to them for collimation. When i received it back, it was perfect and it has remained so.
I thought i would point this 30 day collimation warranty out because there was NO mentioning of it when i purchased it, and the manual had no mentioning of it. I almost got my tool kit out to give it a go but instead I luckly reached out to Celestion via website chat - that's were i found it all out. Looking forward to seeing everyone's first light with the 8" - it should be a best seller
If I understand this warranty - it means that you can ship it back for adjustment within 30 days of receiving it if you want the collimation tweaked. But if you go ahead and tweak it yourself you haven't voided anything other than the ability to have them adjust it - within 30 days. I would just do it myself rather than ship it to them.
The RASA manual says you may need to tweak collimation after transport - and I sure would expect to. But I guess if you see a severe problem that looks hard to fix with collimation then you might want to ship it back right away.
And I guess the 30 day warranty applies to all their scopes. I didn't even know about it. I would tweak collimation on any scope I received through the mail - if it has collimation adjustments for the purpose.
For something with such a flat and well corrected field - it might even need tweaks for different cameras - due to slightly different sensor tilt.