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[Official] The Astrophotography Thread - Page 20

post #191 of 252
Now that's more like it, jsigone. biggrin.gif
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Originally Posted by VaiFanatic View Post

It's been terrible, the cough has developed into minor bronchitis, so I'm always wheezing. Not good!
I think my case developed into mild pneumonia, but I just got over it yesterday. Now it feels like I have the worst cold ever, and the coughing left my throat raw enough that each sneeze is torture. I can't wait for this to end...
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post #192 of 252
few more...but w/ a old used CCD I picked up early last yr. TEC cooled, low noise and mono. It's a 2/3s chip, so tighter FOV then with the Canon.


M51 LRGB with Starlight Xpress HX916 by jsigone, on Flickr


Horsehead Nebula Ha 9x5min by jsigone, on Flickr


IC410 Tadpoles Ha, 12x10min by jsigone, on Flickr


M45 L-RG(LB) blend by jsigone, on Flickr


M42 Orion Nebula LRGB by jsigone, on Flickr
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post #193 of 252
Those are fricking insane, especially the Horsehead nebula. I've only seen that one classic photo of that and to see someone on here take their own picture of it is amazing.
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post #194 of 252
thanks cheers.gif
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post #195 of 252
@jsigone Those are some epic photos. Thanks for sharing.
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post #196 of 252
Awesome photos jsigone! I wish I could afford a decent motorized mount like a EQ5 or so. The prices in NZ are quite ridiculous for decent mounts.

Took this about a week back.

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post #197 of 252
Do you guys have any advice on a decent dual-purpose, starter telescope? By that I mean useful for both photography and viewing. Research has pointed me towards this for the 5" diameter, f/5 aperture, and the motorized mount. I have more interest in galaxies and nebulae than planetary objects.
Edited by groundzero9 - 2/25/13 at 1:11pm
post #198 of 252
Quote:
Originally Posted by groundzero9 View Post

Do you guys have any advice on a decent dual-purpose, starter telescope? By that I mean useful for both photography and viewing. Research has pointed me towards this for the 5" diameter, f/5 aperture, and the motorized mount. I have more interest in galaxies and nebulae than planetary objects.

The mount that scope comes with is not so great for astrophotography.

Minimum I'd recommend is a EQ3-2 only using camera and a telephoto lens. If you wish to use a scope and do astrophotography with it then a HEQ5 is what you'd want. All depends on what kind of images you are expecting.

That scope is quite nice, only a bit short on focal length plus being fairly fast it will require higher quality eye pieces for visual observing.

It would be a great starter scope for the price (so jeleous, in NZ for that it's easily 1K) but you will soon outgrow it and want to upgrade.
Edited by ErOR - 2/25/13 at 5:34pm
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post #199 of 252
Quote:
Originally Posted by ErOR View Post

The mount that scope comes with is not so great for astrophotography.

Minimum I'd recommend is a EQ3-2 only using camera and a telephoto lens. If you wish to use a scope and do astrophotography with it then a HEQ5 is what you'd want. All depends on what kind of images you are expecting.

That scope is quite nice, only a bit short on focal length plus being fairly fast it will require higher quality eye pieces for visual observing.

It would be a great starter scope for the price (so jeleous, in NZ for that it's easily 1K) but you will soon outgrow it and want to upgrade.

Thanks for the input! However, can you recommend anything a little more affordable? I'm looking to spend about $300USD max. Using a telephoto lens isn't an option for me as I use a Fujifilm X-E1. The longest lens offered is a 60mm macro with a $650 price tag. Would either of these be better compromise? Celeston and Meade
post #200 of 252
Quote:
Originally Posted by groundzero9 View Post

Do you guys have any advice on a decent dual-purpose, starter telescope? By that I mean useful for both photography and viewing. Research has pointed me towards this for the 5" diameter, f/5 aperture, and the motorized mount. I have more interest in galaxies and nebulae than planetary objects.

In the spirit of a tech forum, I'm going to suggest something a little radical - make one.

As someone else said, that mount won't be great, and the mirror won't be very good at f/5 for that money (the faster the scope, that is to say, the lower the f/ number, the harder a mirror is to correctly figure).

Your best option, unless you can afford something in the range of a Meade LX200, is to make something.

Mel Bartels scope.exe will let you control a scope from a computer (goto functionality with software like starry night pro or TheSky). People motorise dobsonian mounts using stepper motors and rotary encoders all the time. It's a big(ish) project, but would be fun and educational.

That said, the issue with making a dobsonian is that you'll also need to buy or make a field derotator to use it for long exposure photography (ie. galaxies), but as a purely visual scope in the meantime, or for photographing bright objects like planets where exposures are short enough that field rotation is not a problem, you'll find a bigger aperture, home made scope absolutely outclasses what you can buy unless you spend a fortune.

As for making a mirror, you can either just buy one, or for more satisfaction and if you have room to do it, make it yourself.

Here's some excellent classic books on the subject:

AMATEUR TELESCOPE MAKING by ALBERT G.INGALLS

http://www.amazon.co.uk/The-Dobsonian-Telescope-Practical-Telescopes/dp/0943396557/ref=sr_1_3?ie=UTF8&qid=1361848324&sr=8-3

If you do decide to buy, you'll need to spend at least 10x what you suggested to get satisfactory photographic results on galaxies - these objects are very dim, and exposures need to be long, so you'll find that the mount needs to be really very good, although modern image stacking and processing techniques do help to offset that a bit.

The other thing you need to ask yourself is how dark is your observing site? Without a properly dark sky, attempting to image galaxies with a scope of any size is pretty pointless.

Sorry to be a downer on your plans - it's just I've looked into this stuff a lot, I nearly moved to a super dark site and had plans to build a really big scope a while back, it never materialised but it's still there as a long term ambition, so I know quite a bit about the constraints and limitations, but even if you intend only a fairly simple setup for astrophotography you do need to take care over light pollution, mount quality and so on, and none of that comes cheap, but if you make it yourself you can end up with very good gear for a reasonable cost.
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