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  #1  
Old 23-11-2010, 11:16 PM
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darth_draconis (Adrian)
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New guy both here and to astrophotography

Hi all, Im Adrian aka darth_draconis, i hate introducing myself, i always have trouble describing myself so ill get ask my question and hopefully over time you can get to know me. I am looking into taking up astrophotography as a new hobby. The only thing I have at this stage is the camera, which is a Pentax SLR, so i would like some ideas on what i should look at buying for a beginners setup.

For the telescope i was looking at the Celestron AstroMaster 130EQ Telescope (the price is also about what im looking at to spend on the telescope)

And if im on the right path i would also need the Celestron T-Ring for 35 mm Pentax K Camera and Celestron T-Adapter, NexStar 4, C90 Mak and C130 Mak.

Is my line of thinking correct or are there better options/equipment i should look at.

Thanks
darth_draconis
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  #2  
Old 23-11-2010, 11:25 PM
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jenchris (Jennifer)
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The scope is fine and you will have a lot of fun learning about vibration windsong and resonant arcs.
The mount is a bit light for Astrophotography but it is a good learning tool.
You'll learn some good habits like walking like a ninja and setting up in quiet wind free places where the ground is soft enough to absorb vibration but hard enough not to allow sinkage.

It will do the job and so on, not what I would pick though.
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Old 23-11-2010, 11:40 PM
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darth_draconis (Adrian)
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Ok, i must admit i didnt think about wind considering i am most likely to go to the top of mt arapiles and setup there.

If i may ask, what telescope would you recommend for a beginner? I am looking at a budget of around $500 (preferably that would cover all the required equipment)
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Old 24-11-2010, 12:02 AM
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jenchris (Jennifer)
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I'm not familiar enough with prices to be of any help I'm afraid.
I'd probably not go where you're heading at all.
I'd go for visual for a year or so to learn my way around and save for a decent mount and a scope to go on it for AP later.
In which case I'd buy an 8" dob second hand or a 6" new
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Old 24-11-2010, 12:09 AM
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Adrian you will be pretty hard pressed to get a decent image out of that rig. AP costs money and you will need to increase your budget quite a bit before you will get a suitable setup.

Mark
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Old 24-11-2010, 12:45 AM
Sylvain (Jon)
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I agree with mark: you're better off saving as it would be very tough to get anything decent in AP with this type of equipment and budget. For AP the most important is the mount though, so if you're looking at spending limited amounts of $ you could look at getting an equatorial mount (maybe second hand) an using a zoom lens on your camera for wide field views.
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Old 24-11-2010, 02:16 AM
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mswhin63 (Malcolm)
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You might be able to get started with Moon and Planetary but for Deepsky you would need to have a bigger budget for sure.

The EQ mount will be the most important purchace to start.
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Old 24-11-2010, 07:03 AM
Alchemy (Clive)
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Welcome to the complete money pit of astro imaging.
Best you can do short term is buy your eq mount and just do widefields with the camera.....
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  #9  
Old 24-11-2010, 08:45 PM
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darth_draconis (Adrian)
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Thanks for the replies, im kinda glad i asked first instead of rushing out and buying stuff.

So after reading everyones replies im going have to ask what would be a good starting out budget?

I will say that i had kinda figured it was expensive, ive been looking around at telescope prices for a while now and so your comments dont suprise me that much. I was looking at mainly shooting the moon for a start. I had planned to start small (cheap and nasty basicually) and learn from there and as the budget allowed upgrade as i learnt more.

Really long term goal is to build a backyard observatory.

Last edited by darth_draconis; 24-11-2010 at 09:19 PM. Reason: got side tracked and posted and incomplete post
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  #10  
Old 24-11-2010, 10:17 PM
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Sounds like a sensible approach Adrian. You can use just about anything to image the moon, I have seen good shots from a push to dob. Planets are also within the reach of most basic setups. When you progress to DSO's though you need to understand the complexities involved. Your mount must be accurate enough to hold a point of light on a few pixels for a reasonable amount of time if you are to get any really good results with lots of detail. My average exposure is about ten minutes due to light pollution but in a recent thread on the imaging board someone showed exposures of 60mins, it really depends on your sky and the brightness of the object itself. If you intend to go for DSO's you will need to consider the following.

1. A good accurate equatorial mount.
2. A good quality telescope.
3. Generally a field flattener/corrector of some sort.
4. An autoguider setup (camera with a guidescope or off axis guider).
5. A good quality highly sensitive camera.
6. About 6 million adaptors and fittings to connect it all together .
7. A laptop with suitable software
8. Lots of patience and technical nouse.
9. Be prepared to read a lot, processing is not easy.
10. Did I say a good accurate equatorial mount?

The price you pay is up to you but generally about $2500 for a very basic setup through to $100000 + (dont laugh some members have that sort of investment in AP but their pics are also outstanding).

The cheapest suitable mounts (HEQ5 pro and EQ6 Pro) are made by synta and sold under the skywatcher brand. The price of these mounts will vary lots both second hand and new depending on dealer. I recently sold my HEQ5 pro for $500 but they generally fetch about $800 - 900. I just didn't have the space to keep it. The EQ6 usually goes for $1100+ second hand but can carry a bigger load. These mounts often need fine tuning to get them to the required standard but the raw materials are there. It is quite a big step up from there to the next rung of suitable mounts ($4000 + new) which is why the EQ5 and EQ6 are seen as such good value and really only the health of your bank account will stop you.

It is best to start with a fast scope (eg F6 and below) and a small 80mm apochromatic refractor is often the go as they can be bought quite cheaply both new and second hand and do not demand much from the mount. Most of these types of scopes need a field flattener to correct the field over larger chips e.g. a DSLR. There are lots of options here but it is better to buy ones that are purpose built for the scope (often by the manufacturer). It is best to avoid fork mounts and slow scopes (F10 etc) with long focal lengths as these demand a highly accurate mount and will only bring you grief (it costs lots both finacially and mentally to do narrow field )

There are many options for autoguiding but most folks around here use the QHY 5 (~ $300) with either and off axis guider (will bring you to tears trying to get it right) or a cheap guide scope in the form of a small achromatic refractor or even a modified finderscope (50mm +). Of course you need all the brackets and adaptors to mount it all.

Camera is up to you but most folk begin with DSLR's and once the bug bites end up spending thousands on purpose built peltier cooled astro cameras. These can be one shot colour or monochrome which need filters to create a colour image (even more expense). They range greatly in price from one or two thousand through to stupidly ridiculous.

Technical abilty is pretty much a given requirement as things always go wrong and you need to be able to fix it as is computing nouse. Constructing a pretty picture is not easy.

You can of course source most of this stuff second hand which will reduce the cost somewhat. Keep an eye on the classifieds board.

Hope this helps

Mark

Last edited by marki; 24-11-2010 at 10:39 PM.
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  #11  
Old 28-11-2010, 09:51 PM
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darth_draconis (Adrian)
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hi again,

Thanks for all the advice and tips. I have been looking into the prices of the suggested equipment and im beginning to see that it does take a lot of money.

I am going to think about it for the short term and see what happens. Im hoping i can find a good second hand mount and scope. Im thinking i will have to buy each part separately and make this a long term project.

The upside to this is that it will give me time to get some books and read up. Any good books you can recommend?
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