Orpington Astronomical Society

Astronomy => Astrophotography => Topic started by: MarkS on Sep 26, 2015, 23:19:01

Title: Practice run for the eclipse
Post by: MarkS on Sep 26, 2015, 23:19:01
Quick practice run for the eclipse.

Sony A7S on Celestron C11 with TS 0.8x flattener.  1/160sec at ISO 100 with electronic shutter so NO mirror slap or shutter vibration.

(http://www.markshelley.co.uk/Astronomy/2015/moon20150926small.jpg)

Larger version here:
http://www.markshelley.co.uk/Astronomy/2015/moon20150926.jpg

Mark
Title: Re: Practice run for the eclipse
Post by: JohnP on Sep 26, 2015, 23:21:06
what's the weird bit at bottom ( 6 o'clock pos)..?
Title: Re: Practice run for the eclipse
Post by: Mike on Sep 26, 2015, 23:23:06
Quote from: JohnP on Sep 26, 2015, 23:21:06
what's the weird bit at bottom ( 6 o'clock pos)..?


Looks like a dust bunny to me.

Great pic for a single frame.
Title: Re: Practice run for the eclipse
Post by: MarkS on Sep 26, 2015, 23:53:05
Yes, it's a lump of dust.  I didn't calibrate with a flat frame :(

Mark
Title: Re: Practice run for the eclipse
Post by: JohnP on Sep 27, 2015, 09:17:42
you sure its not some new Alien evidence ;-)
Title: Re: Practice run for the eclipse
Post by: Fay on Sep 27, 2015, 11:09:27
I thought I could get the Meade 8 1/2 out, but having looked high & low, I do not have a suitable adaptor to take the DSLR......shame
Title: Re: Practice run for the eclipse
Post by: Fay on Sep 27, 2015, 12:21:36
Looks like cloud for me tonight
Title: Re: Practice run for the eclipse
Post by: Kenny on Sep 27, 2015, 12:43:39
Quote from: Fay on Sep 27, 2015, 11:09:27
I thought I could get the Meade 8 1/2 out, but having looked high & low, I do not have a suitable adaptor to take the DSLR......shame

Fay - What do you need? I have a 1.25" T-ring / T-Adaptor for a Canon you can borrow. If you need to borrow bits from the OAS Meade let me know i.e. 1.25" Visual Back for the Meade.
Title: Re: Practice run for the eclipse
Post by: MarkS on Sep 27, 2015, 13:36:17
Quote from: Fay on Sep 27, 2015, 12:21:36
Looks like cloud for me tonight

Indeed, the forecast is looking far less promising now :(

Mark
Title: Re: Practice run for the eclipse
Post by: Fay on Sep 27, 2015, 13:40:46
Oh thanks Kenny. I need 2" adaptor for back of meade, that DSLR extension tube would fit in to. I think it is going to be cloudy anyway, and I can always use just  the camera with a lens. i would have to get out of a warm bed yet!!!!!!!!!!!(obstacle no 1)
Title: Re: Practice run for the eclipse
Post by: Kenny on Sep 27, 2015, 14:28:14
Why do you need 2"?
Title: Re: Practice run for the eclipse
Post by: Fay on Sep 27, 2015, 14:31:05
to fit the extension tube on the dslr into the adaptor, it is a 2"
Title: Re: Practice run for the eclipse
Post by: The Thing on Sep 27, 2015, 16:42:51
Quote from: Fay on Sep 27, 2015, 14:31:05
to fit the extension tube on the dslr into the adaptor, it is a 2"
Hi Fay,

Did you get a 2" - SCT diagonal as part of the gear? That would do at a pinch. What you really need is an SCT to T thread adaptor then you can screw the Canon T adaptor directly to the scope rather than using a wobbly push fit 2" extension.
Title: Re: Practice run for the eclipse
Post by: RobertM on Sep 27, 2015, 16:46:02
I have what you need to fit your DSLR to that scope, namely a Canon to 2" push fit adaptor.

Looking decidedly dodgy weather wise unless I head out to Brighton or somewhere else on the coast :(
Title: Re: Practice run for the eclipse
Post by: Fay on Sep 27, 2015, 17:13:08
I got a 1 1/2" fit with it.

I have the adaptor that goes on the dslr, already, but cant fit it to the sct. no worries, I would not have bought anything else, as I am waiting for the focusers to come in beginning of October. I have gone thru all my stuff but nothing fits, not even push pull
Title: Re: Practice run for the eclipse
Post by: RobertM on Sep 27, 2015, 17:31:26
<goalpost move>Like I said I have what you need, even an SCT to Canon bayonet</goalpost move>

If you don't want to use it then that's up to you.

Robert
Title: Re: Practice run for the eclipse
Post by: Fay on Sep 27, 2015, 17:57:04
thats very kind Robert, I should have thought earlier. John has just come in from being out fishing.

I have set up to test the guide camera, and will use the 300mm lens if I happen to be around early hour of the morning.

It would be nice to borrow it this week  sometime so I can check things out.