Changing/upgrading mounts

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Changing/upgrading mounts

Postby cwardlaw » Mon Jan 23, 2017 4:33 pm

I have had a Celestron evolution 9.25" scope on an Alt /AS mount and am realising that with a f/10 ratio I am not best equipped to move into the world of Astrophotography. Without changing everything very expensively can anyone suggest what mount may be able to take the weight of my scope which is around 16kg.

Many thanks for any help you can give
C Wardlaw
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Re: Changing/upgrading mounts

Postby Aratus » Mon Jan 23, 2017 6:17 pm

It depends exactly what you want to do. I have an 8" SCT on an alt-azimuth, and I haven't yet run out of targets to photograph. Photographing the moon and planets, would be well catered for with your telescope. For the brighter deep sky objects I've not had any problems with exposures running up to a minute or so (depends where in the sky you are looking) You can buy a focal reducer for about £100 which will give you a f/6.3 ratio, which can help.

I think you can move into astrophotography with very little extra cost. If you get to a point where you want to move on further, then you could think about a 'wedge'. I note a suitable one for your telescope is available for about £340 For instance https://www.firstlightoptics.com/cpc-gps-series/celestron-hd-heavy-duty-pro-wedge.html I have been thinking of that myself.

The other option is to buy an equatorial mount, but they are pretty expensive for your size of telescope. You will need a heavy duty one. A good one may cost you £1000s
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
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Re: Changing/upgrading mounts

Postby cwardlaw » Wed Jan 25, 2017 1:07 pm

Thank you, and as ever you have been so helpful. I will decide to save money most probably and keep working with my very good scope.
C Wardlaw
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Re: Changing/upgrading mounts

Postby cwardlaw » Fri Feb 03, 2017 10:33 am

If I do go down the route of a focal reducer can I use that in conjunction with my camera on the end of scope...

Thanks
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Re: Changing/upgrading mounts

Postby Aratus » Sat Feb 04, 2017 12:21 am

Certainly. Take off the eyepiece tube and diagonal. Screw in the focal reducer into the visual back and then the camera adapter in the normal way. You will get a significantly wider field on the camera. I look forward to seeing the results.
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
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Re: Changing/upgrading mounts

Postby cwardlaw » Sat Feb 04, 2017 1:49 pm

Thanks again. Just a little...or a lot of research now as to what I should be buying.

C Wardlaw
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Re: Changing/upgrading mounts

Postby Aratus » Sat Feb 04, 2017 11:33 pm

Celestron does a 6.3 reducer which I use myself.
https://www.firstlightoptics.com/reducersflatteners/celestron-f63-focal-reducer.html

You may be able to get it cheaper elsewhere, but I've not seen one recently.

There may be cheaper makes too, but be certain that they fit the celestron visual back.

It is a very useful accessory, which I use just as often as without.
I use an 11" Celestron SCT (CPC 1100) on an equatorial wedge, housed in a 2.2m Pulsar observatory. I use a ZWO ASI1600MC and Canon 500D for imaging.
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Location: East Lincolnshire

Re: Changing/upgrading mounts

Postby The Man with the Corrugated Iron Roof » Sun Mar 05, 2017 5:49 pm

You can get an Antares screw-in focal reducer, too.
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