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Old 15-04-2012, 06:27 PM   #31
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Latest pic is of M13 the globular cluster in Hercules.

Click the image to open in full size.
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Old 15-04-2012, 07:54 PM   #32
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Nice, is that slight haze towards the centre in-lens, or local town ambient or something? (he says wildly guessing).
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Old 16-04-2012, 10:58 PM   #33
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Originally Posted by Tricky View Post
Nice, is that slight haze towards the centre in-lens, or local town ambient or something? (he says wildly guessing).

Correctomundo. It's a gradient introduced as a result of the optical path of the telescope and camera. I'm making a light box at present to enable me to take some 'flats' which are then subtracted from the image to remove these gradients and the effects of dust etc.

Anyway here's my latest image, M101 The Pinwheel Galaxy. And those with keen eyes might spot last years supernova SN 2011fe in the lower spiral arm just past the six o'clock position. To put that into some perspective all the stars you can see in the image apart from the supernova are in our galaxy. The supernova, which is a star that has gone bang, is a star in a galaxy that is 21 million light years away yet it is still as bright as some of the stars in our own galaxy.

Click the image to open in full size.
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Old 17-04-2012, 01:23 AM   #34
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Great images again Sim, Your getting very adept
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Old 17-04-2012, 07:39 PM   #35
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Top notch Slim you are really getting the hang of this processing lark , these are as good as i have seen, must be getting the hang of the new camera then.
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Old 18-04-2012, 09:23 AM   #36
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Hi, love the pics slim, can't help getting the feeling that I want to move the wheel on the mouse and zoom-in more
great stuff!
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Old 22-09-2012, 01:27 AM   #37
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Been a while since I had the scope out what with the light nights but getting a bit darker now. Managed to get an image of M57 the Ring Nebula which is a Planetary Nebula in Lyra.

Full Size

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Cropped

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Old 22-09-2012, 01:59 AM   #38
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That's awesome, love to have the time, technology & knowledge to do it.
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Old 22-09-2012, 02:45 AM   #39
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Another great pic slim. I really like these astro' shots.
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Old 22-09-2012, 09:11 AM   #40
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Very nice
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Old 22-09-2012, 09:19 AM   #41
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Thanks for another great capture slim

Bit off the subject and likely to look a dummy here, If I buy/sponsor a star (mum wants to remember her sister who past) What are the chances of people actually seeing it or capturing an image of it?
Not looked into this at all yet but seeing the pic above made me wonder.
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Old 22-09-2012, 04:31 PM   #42
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Originally Posted by TfR Newt View Post
Thanks for another great capture slim

Bit off the subject and likely to look a dummy here, If I buy/sponsor a star (mum wants to remember her sister who past) What are the chances of people actually seeing it or capturing an image of it?
Not looked into this at all yet but seeing the pic above made me wonder.

My wife bought one for me as a present from my daughter. I've looked through my scope at the location it's supposed to be but haven't been able to see it. I would think its luck of the draw if you get a decent one one not. I guess if you point a camera at it long enough you will see it. At the end of the day though its the thought of it.

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Old 26-09-2012, 12:31 PM   #43
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My latest image, a few galaxies in there.

Click the image to open in full size.




....only joking, that's the new Hubble eXtreme Deep Field (XDF), looking back to just 400 million years after the big bang. More info from NASA NASA - Hubble Goes to the eXtreme to Assemble Farthest-Ever View of the Universe
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Old 07-10-2012, 11:51 AM   #44
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Managed to get out and image a new target last night. This is M27, the Dumbell Nebula.

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And cropped.

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  awesome =) keep them coming dude
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Old 07-10-2012, 12:40 PM   #45
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That's awesome again mate
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Old 07-10-2012, 01:44 PM   #46
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ive got myself a new DSLR (600d) and spent the week out in deepest derbyshire, attempted to get a shot or two, but couldn't figure out how to compensate for the rotation of the earth, so everything just looked blurred.

would like a decent telephoto lense aswell, loving the images slim, makes me want to get into it.
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Old 07-10-2012, 07:09 PM   #47
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Originally Posted by LeeTBTS View Post
ive got myself a new DSLR (600d) and spent the week out in deepest derbyshire, attempted to get a shot or two, but couldn't figure out how to compensate for the rotation of the earth, so everything just looked blurred.

would like a decent telephoto lense aswell, loving the images slim, makes me want to get into it.

You can take some cracking widefield images using just a camera and a decent lens. Something like Orion would look great as there is loads of stuff going on around over a large area of the sky. But you would need a mount that tracks the motion of the sky. You need an equatorial mount that's spins around a point close to Polaris called the north celestial pole. That would be a great start which would allow you to take longer exposures but to take really long exposures, 3 mins or more an equatorial mount will still not be accurate on its own. You need to use a guide camera and some guide software. Basically you attach a camera, I use a webcam, to a small telescope, I use a finder scope, and then use a piece of software on a laptop to monitor how the stars in the guide camera move, the software then sends small adjustments to the mount so that the mount perfectly tracks the motion of the stars (even though its actually the movement of the earth!).

If you are only going to use a camera you don't need a big expensive mount designed to carry a lot of weight, so could probably do it reasonably cheaply. If you want anymore info just ask and I'll see what I can find from a couple of forums.
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Old 11-11-2012, 11:49 AM   #48
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Nice clear sky last night so managed a few hours in the cold. This is a revisit of M42, the Great Orion Nebula. As you can see it's a vast improvement from my earlier efforts at M42 but I'm not that happy with it. For some reason I couldn't get the mount to track properly so it's made it look a little out of focus.

Click the image to open in full size.

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  fantastic image!
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Old 11-11-2012, 12:04 PM   #49
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Poor tracking or not thats still an amazing image, thanks for sharing it
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Old 11-11-2012, 07:35 PM   #50
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I had another crack at processing M42, this time with some 5 minute subs I took, which seem to have better tracking, and going a different route on the processing. Seems to be a little bit more detail in the nebulosity in this one.

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Old 16-11-2012, 02:46 PM   #51
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So some new astro goodies turned up yesterday to hopefully improve my pics. Couldn't resist a little imaging session last night and have managed to composite to images together. Which basically means taking a series of long exposures, 3 mins in this case, and combining that with a series of shorter exposures, 10 secs in this case, to make a final image that doesn't have any real bright burnt out areas as in the image in the previous post.

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Old 18-11-2012, 11:46 PM   #52
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Think I'm finally getting the hang of this lark. Same target but much more data and more trickery with the processing this time.

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Old 19-11-2012, 12:03 AM   #53
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wow!

What's the original resolution and file size of your shots out of interest? or does it differ from pic to pic
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Old 19-11-2012, 12:09 AM   #54
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Originally Posted by Bailey View Post
wow!

What's the original resolution and file size of your shots out of interest? or does it differ from pic to pic

The original resolution is 4290 x 2856 and when all the images are stacked together the file size is around 100 MB but it does differ depending on how many images you are stacking together.
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Old 20-11-2012, 02:49 PM   #55
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Kin ell Slim that last image of m42 is up there with the best mate , absolute corker. Cant wait to see what else you are going to come up with.
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Old 20-11-2012, 02:57 PM   #56
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Slim that last shot is mega. I was in PC world yesterday and noticed they had a few telescopes in, there was 1 that was motorised but i dont think it tracked the movement. Are you using a fixed scope our is it tracking for longer exposures? Was that pic taken with your webcam or DSLR?
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Old 20-11-2012, 04:00 PM   #57
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Originally Posted by Spacejock55 View Post
Kin ell Slim that last image of m42 is up there with the best mate , absolute corker. Cant wait to see what else you are going to come up with.
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Originally Posted by hOnG k0nG fu3y View Post
Slim that last shot is mega. I was in PC world yesterday and noticed they had a few telescopes in, there was 1 that was motorised but i dont think it tracked the movement. Are you using a fixed scope our is it tracking for longer exposures? Was that pic taken with your webcam or DSLR?

It's a scope that tracks but it's not accurate enough for long exposures so I have a smaller scope attached to my bigger scope. I then use a webcam attached to the smaller scope that is plugged into my laptop that runs a piece of software which takes the images from the webcam and sends small adjustments to the telescope to ensure that the scope perfectly tracks the sky. This way you can easily get ten minute exposures with no star trailing whatsoever.

The pic was taken with my Canon 1100D DSLR. It's a total of 68 x 60 second exposures with 10 dark frames (to get rid of sensor noise and hot pixels) and 20 flat frames (to get rid of any vignetting).
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Old 20-11-2012, 06:21 PM   #58
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Christ, ill never moan about a complex shot again!

Totally worth it though, fantastic images, you can clearly see your expertise improving.

What lens and ISO do you tend to use, or is it a combination based on exposure, also I was wondering how much you need to crop the frame to get the cluster to fit?
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Old 20-11-2012, 07:54 PM   #59
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Originally Posted by LeeTBTS View Post
Christ, ill never moan about a complex shot again!

Totally worth it though, fantastic images, you can clearly see your expertise improving.

What lense and ISO do you tend to use, or is it a combination based on exposure, also I was wondering how much you need to crop the frame to get the cluster to fit?

It's prime focus so don't use a lens, the telescope is effectively the lens. I usually stick to ISO 800 but can use 400 or 1600 if needed. No cropping at all in that image, that's full frame! And M42 would cover a bigger area if the frame was a bit bigger, it's a huge target and easily seen with the naked eye if you get some really dark skies and in the darkest skies you will probably be able to see some colour.
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Old 16-12-2012, 01:42 PM   #60
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Anymore excellent images to show us slim ?
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