Mars and Saturn from March 27th

Saturn and Mars, 100 frames stacked from ~5 minutes of video recorded with the 600D in 3x mode full HD (native 1920x1088 resolution), through the 8" newt with 2x barlow and extension tube on the LXD75 mount.
Stacked in AstroStakkert2, with very light wavelets in Registax6.

Thoughts?

Nice Cathal, good to see your still keeping up the astronomy

Ronan

Thanks Ronan,
College and the new job have kept me away from the scopes and away from Galway for the past while, but I try to dip in every so often to get my astro fix. Dabbling in astrophotography can be interesting..

I'll have to wait till the lectures finish up this summer before I can do any social observing, but I'm looking forwards to meeting up with people again if I can.

Nice Images, Cathal,

What size barlow did you use 1 ¼” or 2” ?
Are they actual size or have you increase them some what.
I have a 1100d and find when I add a 2” x barlow I get a
ghostly circle in the centre of the image.

Have only tried this on an 80mm refractor, so will have
to investigate more.

Tony

I'm using a Tele Vue 2x 1.25" barlow for the planetary work. I've started using a 1.25" extension tube made from unscrewing the lens from a Soligor 2x barlow, and that gives me another maybe, 40-50mm of extension from the TV lens. On the camera I've got the usual 1.25" to T-thread adapter.
For deep-sky I have a 2" field flattener that has t-threads on the rear of it, so no vignetting from my scope with it.

Tony,
It sounds like a reflection of some type from your imaging train. Do you see something similar with an eyepiece instead of the camera? Another possibility is that there's a reflection from the filters in front of the camera sensor, that's being reflected again from the curved Barlow lens. Try moving the camera a few mm out from the Barlow and see if the circle changes size.

As for the size, they are 1.5x larger than from the camera as I've used the 1.5x drizzle option in AS!2, bot otherwise they are unscaled. Mars is I think ~30-40 pixels across on the raw video but I'd have to check that. They require more/better processing anyway - I've a lot more to get from those captures than I have already got.

Thanks Cathal,

Some great info and advice.
Yeah it looks like reflections of some sort. Will try a few options as you suggested.

No problem when using eyepiece or camera, only when I introduce the 2” barlow with camera.

Have yet to try camera and 2” barlow on my 8” reflector so hopefully it will work, if not
I will go down your route and get myself a 1.25” T adaptor, as I have a couple of 1.25 barlows
and I can use one as an extension.

Keep working with those images, I’m sure there’s a lot more info in them..

Tony