OMG RASA 6!

The Celestron Origin has been out for a while. Selling the OTA on it's own now aswell is just the next logical step. This should pair very well with the IMX585 or IMX533.

The image circle is really tiny at 16mm. It seems like it could fill a niche for people seeking a portable fast scope but more interested in smaller FOVs than super widefield.

I'm not sure that it's a good solution in this small of an aperture. as others have pointed out, it's a huge central obstruction with a cooled 585 camera coming in at over 50%. There is a price to be paid there with low system contrast. Because of all that the actual T-Stop of that system is f/2.7  without a filter. In actual light gathering power you have the equivalence of something smaller than a 120mm refractor.

An other area of concern is that the warm air shooting out of the camera cooler has to degrade the image, especially when it's trapped down inside the dew shield. If you've ever had your hand in front of a primary mirror on a test stand you'll know exactly what I'm talking about. In addition to that, you have the camera cable giving you wonky diffraction effects and you can't use a filter wheel.

I don't know, People do get good images out of larger versions these systems despite the built in shortcomings but in this small size? I think it's really pushing things. At the very least it would make more sense just to go with the 8".

Tony Gondola:
I'm not sure that it's a good solution in this small of an aperture. as others have pointed out, it's a huge central obstruction with a cooled 585 camera coming in at over 50%. There is a price to be paid there with low system contrast. Because of all that the actual T-Stop of that system is f/2.7  without a filter. In actual light gathering power you have the equivalence of something smaller than a 120mm refractor.

An other area of concern is that the warm air shooting out of the camera cooler has to degrade the image, especially when it's trapped down inside the dew shield. If you've ever had your hand in front of a primary mirror on a test stand you'll know exactly what I'm talking about. In addition to that, you have the camera cable giving you wonky diffraction effects and you can't use a filter wheel.

I don't know, People do get good images out of larger versions these systems despite the built in shortcomings but in this small size? I think it's really pushing things. At the very least it would make more sense just to go with the 8".

This scope is developed for the Celestron Origin smartscope and now is sold as an OTA or in a package with an AVX. It's not really ment to be used with cooled cameras to take long exposures.
You don't need to do long exposures with this fast scope anyways. 30 seconds should be enough and this also doesn't require autoguiding. An uncooled IMX585C is the perfect camera for this scope.

Tony Gondola:

Tony Gondola:
I'm not sure that it's a good solution in this small of an aperture. as others have pointed out, it's a huge central obstruction with a cooled 585 camera coming in at over 50%. There is a price to be paid there with low system contrast. Because of all that the actual T-Stop of that system is f/2.7  without a filter. In actual light gathering power you have the equivalence of something smaller than a 120mm refractor.

An other area of concern is that the warm air shooting out of the camera cooler has to degrade the image, especially when it's trapped down inside the dew shield. If you've ever had your hand in front of a primary mirror on a test stand you'll know exactly what I'm talking about. In addition to that, you have the camera cable giving you wonky diffraction effects and you can't use a filter wheel.

I don't know, People do get good images out of larger versions these systems despite the built in shortcomings but in this small size? I think it's really pushing things. At the very least it would make more sense just to go with the 8".

This scope is developed for the Celestron Origin smartscope and now is sold as an OTA or in a package with an AVX. It's not really ment to be used with cooled cameras to take long exposures.
You don't need to do long exposures with this fast scope anyways. 30 seconds should be enough and this also doesn't require autoguiding. An uncooled IMX585C is the perfect camera for this scope.

I would agree. I would think that something like the QHY5iii715C would be a good choice. With tiny 1.49 micron pixels you won't be giving up any resolution in good seeing and the obstruction would be a lot less. It might be very well suited for deep sky lucky imaging experiments.

I image with an uncooled version of the IMX585C in combination with a Sky-Watcher Quattro 150P at F3.45 and take up to 120second exposures with it. Granted I image at 61° N lattitude, so the sensor doesn't need much cooling as it's usually below zero outside on a clear winter night and the sensor never gets warmer than around 0°C/32°F.
Celestron uses the IMX178C in it's smartscope version, which has 2.4µm pixels, but the bigger chipsize of the IMX585C and the zero ampglow would be the better fit, even with it's slightly bigger pixels of 2.9µm.

I for one am excited for this. I only get about 50 clear nights a year so speed definitely helps getting the most out of those. People have been using a C6 + hyperstar for years with good results so I don't see why this would suddenly be any different. 

The reviews should be interesting.

Michael von Berner-Purgstall:

Dunk:
https://youtu.be/UokrHNin980?si=SvbO2p88JXqVpr5X


expensive though - here in Australia its only a tad cheaper than a RASA 8....

You should better say: "OMG - (at least) 46% obstruction!

77mm out of the 152mm are blocked - or practically even more cause of the bigger camera bodies.

It still has the light gathering power of a 128-ish mm refractor. Probably lower contrast but much faster. The CO is not as much of an issue as some make it out to be.