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Foto Fair Post your photos for friendly, non-critical feedback. This is the place to show pictures if you aren't yet ready for full-blooded critique, or simply want to share an interesting picture with other e-group visitors.

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Old 18th February 2014
crimbo crimbo is online now
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Just a minute or two...

...no telescope required... just a driven camera mount... ( badly aligned)





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Old 18th February 2014
stuartpm3 stuartpm3 is offline
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Re: Just a minute or two...

Hi Chris.

Really good. What noise reduction did you use. What were the aperture, exposure times? Also what drive did u use?

Thanks

Stuart
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Old 18th February 2014
brian1208 brian1208 is offline
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Re: Just a minute or two...

thanks Stuart, those were just the questions I was going to aske Chris

Super job there Chris, something I want to get into but haven't sorted out the techniques yet (although I did get Jupiter and its moons last week )
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Old 18th February 2014
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Re: Just a minute or two...

Hi Stuart
noise reduction was the in camera frame subtraction with a little post in CO7 or LR5
30s, 60s,120s at 2.8,1.8,1.8
and the drive is an Orion mini-eq http://www.telescopehouse.com/acatal..._EQ_Mount.html
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Old 18th February 2014
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Re: Just a minute or two...

Thanks for the info Chris. I used to do a lot of astro photos using a telescope. However I find winder angle shots more satisfying.

Stuart
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Old 18th February 2014
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Re: Just a minute or two...

Hi Chris. Couple of more questions. Do you have to buy the motor drive as well. Also can you mount the equatorial drive on a bigger tripod?

Cheers

Stuart
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Old 18th February 2014
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Re: Just a minute or two...

Hi Chris again.

Two final questions. What iso did you use and how do align the mount to the north celestial pole. Ie. Is there some form of alignment scope built in.

stuart
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Old 18th February 2014
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Re: Just a minute or two...

I like #2 and #3. A motor driven equatorial mount (and telescope) are on my wish list but that little motor drive thing from your link looks pretty neat.
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Old 18th February 2014
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Re: Just a minute or two...

Chris, that is a natty looking mount, I don't suppose it has a quick release threaded socket underneath so that one could mount it on a sturdy tripod does it? (it would be really tempting if it did )
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Re: Just a minute or two...

Quote:
Originally Posted by stuartpm3 View Post
Hi Chris. Couple of more questions. Do you have to buy the motor drive as well. Also can you mount the equatorial drive on a bigger tripod?

Cheers

Stuart
Yes you do have to buy the motor but its still half the price of the next device
Its difficult to put on a normal tripod-mine is on an old theodolite tripod
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Re: Just a minute or two...

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Originally Posted by stuartpm3 View Post
Hi Chris again.

Two final questions. What iso did you use and how do align the mount to the north celestial pole. Ie. Is there some form of alignment scope built in.

stuart
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I used ISO 800
There is no alignment Scope-hence a little rough
The more expensive devices have better ease of alignment
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Re: Just a minute or two...

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Originally Posted by brian1208 View Post
Chris, that is a natty looking mount, I don't suppose it has a quick release threaded socket underneath so that one could mount it on a sturdy tripod does it? (it would be really tempting if it did )
Nope
Just a long standard tripod screw
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Old 18th February 2014
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Re: Just a minute or two...

thanks Chris, that's better than it being blank
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Old 18th February 2014
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Re: Just a minute or two...

Those are nice shots. You picked up a satellite trail on #2 and a surprising amount of nebulosity on #3. How dark was your sky where you took these?
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Re: Just a minute or two...

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Those are nice shots. You picked up a satellite trail on #2 and a surprising amount of nebulosity on #3. How dark was your sky where you took these?
For me it mag limits about 5,relatively dust free and LP is concentrated to particular areas
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