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Date: 24 Jul 2006 01:06:31
From: Ioannis
Subject: Astrophotos with smaller refractors?
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Does anyone have any links to astrophotos (digital/film) taken with smaller
cheapo refractors in the 60-80mm range?
I would like to get an idea how such a telescope performs when properly
(equatorially) guided.
Thanks much,
--
Ioannis
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Date: 23 Jul 2006 20:38:13
From: Davoud
Subject: Re: Astrophotos with smaller refractors?
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Ioannis:
> Does anyone have any links to astrophotos (digital/film) taken with smaller
> cheapo refractors in the 60-80mm range?
>
> I would like to get an idea how such a telescope performs when properly
> (equatorially) guided.
The following are neither the best nor the worst of their kind that I
have seen. I took them with a Canon 20D on a TeleVue 76 under
light-polluted skies. The TV 76 is not a cheapo, but I believe that
there are less expensive 'scopes that could better these pics in
more-skilled hands than mine.
<http://tinyurl.com/zpbfg >
<http://tinyurl.com/hldr7 >
<http://tinyurl.com/hgscc >
<http://tinyurl.com/n4roo >
In the latter image I captured a Mag. 19 star in a four-minute
exposure.
Davoud
(Away from home, posting via Google Groups.)
usenet at davidillig dawt com
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Date: 24 Jul 2006 10:28:40
From: Ioannis
Subject: Re: Astrophotos with smaller refractors?
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"Davoud" <goog@davidillig.com > wrote in message
news:1153712293.114795.243220@i3g2000cwc.googlegroups.com...
[snip]
> The following are neither the best nor the worst of their kind that I
> have seen. I took them with a Canon 20D on a TeleVue 76 under
> light-polluted skies. The TV 76 is not a cheapo, but I believe that
> there are less expensive 'scopes that could better these pics in
> more-skilled hands than mine.
>
> <http://tinyurl.com/zpbfg>
> <http://tinyurl.com/hldr7>
> <http://tinyurl.com/hgscc>
> <http://tinyurl.com/n4roo>
>
> In the latter image I captured a Mag. 19 star in a four-minute
> exposure.
Thanks to you and to Stephen for the photos. So small refractors are indeed
quite capable!
If anyone has any more, even with smaller scopes, I'd be delighted to see
them.
> Davoud
> (Away from home, posting via Google Groups.)
> usenet at davidillig dawt com
--
Ioannis
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Date: 23 Jul 2006 19:03:10
From: Stephen Paul
Subject: Re: Astrophotos with smaller refractors?
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Ioannis wrote:
> Does anyone have any links to astrophotos (digital/film) taken with smaller
> cheapo refractors in the 60-80mm range?
>
> I would like to get an idea how such a telescope performs when properly
> (equatorially) guided.
>
> Thanks much,
Here's my shot of the Orion Nebula with an Orion 80ED on a G11 and a
Hutech 1A modified 300D Canon Rebel.
http://tinyurl.com/lv9l3
IIRC, it's something like 20 x 3 mins at ISO400 through an LPR filter.
I use a Stiletto IV for focus before each sequence.
If you look through my site photos for the "DSLR Imager", you can see
the gear I used for the shot. I auto-guided with an ST-4 and an Antares
127mm F6.5 "Semi-ED" achromat.
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Date: 23 Jul 2006 20:38:17
From: AM
Subject: Re: Astrophotos with smaller refractors?
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Stephen Paul wrote:
> Ioannis wrote:
>
>> Does anyone have any links to astrophotos (digital/film) taken with
>> smaller
>> cheapo refractors in the 60-80mm range?
>>
>> I would like to get an idea how such a telescope performs when properly
>> (equatorially) guided.
>>
>> Thanks much,
>
>
> Here's my shot of the Orion Nebula with an Orion 80ED on a G11 and a
> Hutech 1A modified 300D Canon Rebel.
>
> http://tinyurl.com/lv9l3
>
> IIRC, it's something like 20 x 3 mins at ISO400 through an LPR filter.
>
> I use a Stiletto IV for focus before each sequence.
>
> If you look through my site photos for the "DSLR Imager", you can see
> the gear I used for the shot. I auto-guided with an ST-4 and an Antares
> 127mm F6.5 "Semi-ED" achromat.
I like your setup, VERY nice.
Nice shot of M 42.
Personally, I preffer the M 51 shot you have up.
Just me, but it is very nice, and in focus IMHO.
(the stiletto works well)
--
AM
http://sctuser.home.comcast.net
CentOS 4.3 KDE 3.3
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Date: 24 Jul 2006 20:30:25
From: Craig M. Bobchin
Subject: Re: Astrophotos with smaller refractors?
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Nice shot, Was that done @ prime focus or via EP projection? Also what
LPR did you use?
In article <L7mdnR2xyqK3nVnZnZ2dnUVZ_vednZ2d@comcast.com >,
smarshallpaul@gmail.com says...
> Here's my shot of the Orion Nebula with an Orion 80ED on a G11 and a
> Hutech 1A modified 300D Canon Rebel.
>
> http://tinyurl.com/lv9l3
>
> IIRC, it's something like 20 x 3 mins at ISO400 through an LPR filter.
>
> I use a Stiletto IV for focus before each sequence.
>
> If you look through my site photos for the "DSLR Imager", you can see
> the gear I used for the shot. I auto-guided with an ST-4 and an Antares
> 127mm F6.5 "Semi-ED" achromat.
>
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Date: 24 Jul 2006 20:32:50
From: Stephen Paul
Subject: Re: Astrophotos with smaller refractors?
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Craig M. Bobchin wrote:
> smarshallpaul@gmail.com says...
>> Here's my shot of the Orion Nebula with an Orion 80ED on a G11 and a
>> Hutech 1A modified 300D Canon Rebel.
>>
>> http://tinyurl.com/lv9l3
>>
>> IIRC, it's something like 20 x 3 mins at ISO400 through an LPR filter.
>>
> Nice shot, Was that done @ prime focus or via EP projection? Also what
> LPR did you use?
Prime focus with a Celestron SCT LPR filter. I have an SCT threaded 2"
eyepiece barrel that lets me use SCT accessories in any scope, along
with an SCT T adapter for the camera.
It goes in the order, 2" barrel, SCT accessory, SCT T adapter, T Ring,
camera. The whole assembly slips into any 2" focuser.
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Date: 25 Jul 2006 20:44:07
From: Craig M. Bobchin
Subject: Re: Astrophotos with smaller refractors?
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Thanks. I have a similar setup without the LPR filter. I'll have to look
into that.
Craig
In article <ObWdnTtCBq0w-1jZnZ2dnUVZ_sWdnZ2d@comcast.com >,
smarshallpaul@gmail.com says...
> Craig M. Bobchin wrote:
> > smarshallpaul@gmail.com says...
> >> Here's my shot of the Orion Nebula with an Orion 80ED on a G11 and a
> >> Hutech 1A modified 300D Canon Rebel.
> >>
> >> http://tinyurl.com/lv9l3
> >>
> >> IIRC, it's something like 20 x 3 mins at ISO400 through an LPR filter.
> >>
>
> > Nice shot, Was that done @ prime focus or via EP projection? Also what
> > LPR did you use?
>
> Prime focus with a Celestron SCT LPR filter. I have an SCT threaded 2"
> eyepiece barrel that lets me use SCT accessories in any scope, along
> with an SCT T adapter for the camera.
>
> It goes in the order, 2" barrel, SCT accessory, SCT T adapter, T Ring,
> camera. The whole assembly slips into any 2" focuser.
>
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Date: 24 Jul 2006 05:57:39
From: Don't Be Evil
Subject: Re: Astrophotos with smaller refractors?
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Ioannis wrote:
> Does anyone have any links to astrophotos (digital/film) taken with smaller
> cheapo refractors in the 60-80mm range?
>
> I would like to get an idea how such a telescope performs when properly
> (equatorially) guided.
>
> Thanks much,
> --
> Ioannis
The scopes mentioned so far are all apo/semi-apo. Are you asking about
an achromatic refractor in the <$200 range? Different animal.
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Date: 24 Jul 2006 18:27:26
From: Ioannis
Subject: Re: Astrophotos with smaller refractors?
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"Don't Be Evil" <g626700-gg@yahoo.com > wrote in message
news:1153745859.516274.106150@m73g2000cwd.googlegroups.com...
>
>
> Ioannis wrote:
> > Does anyone have any links to astrophotos (digital/film) taken with
smaller
> > cheapo refractors in the 60-80mm range?
> >
> > I would like to get an idea how such a telescope performs when properly
> > (equatorially) guided.
> >
> > Thanks much,
> > --
> > Ioannis
>
> The scopes mentioned so far are all apo/semi-apo. Are you asking about
> an achromatic refractor in the <$200 range? Different animal.
I would expect so. I was qurious to see what kind of photos smaller 60-80mm
simple achromatic refractors (even cheapos such as Tasco or small achro
guide scopes mounted on larger scopes) can shoot, but the info given by
Davoud and Stephen gives me a rough idea anyway.
Perhaps the quality is not enough to warrant good shots?
--
Ioannis
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Date: 24 Jul 2006 11:35:35
From: Paul S. Walsh
Subject: Re: Astrophotos with smaller refractors?
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>"Ioannis" asked: Does anyone have any links to astrophotos (digital/film)
>taken with smaller
> cheapo refractors in the 60-80mm range?
I took this Saturn-off-the-Lunar-Limb shot using an older Orion 80mm F/6.25
Achromat:
http://www.pswalsh.com/astropages/one.htm
The camera was a 2 megapixel Leica Digilux on a homemade adapter ($3 worth
of plumbing parts from home depot. The mount was Alt-Az (Bogen 410 geared
head)
A little post processing was used to diminish the purple fringe and then
localized brightness and contrast boost to bring Saturn out some.
-Paul S. Walsh
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Date: 24 Jul 2006 21:48:50
From: Ioannis
Subject: Re: Astrophotos with smaller refractors?
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"Paul S. Walsh" <upup@bombastic.net > wrote in message
news:12ca4no8bkpcq07@corp.supernews.com...
>
> >"Ioannis" asked: Does anyone have any links to astrophotos
(digital/film)
> >taken with smaller
> > cheapo refractors in the 60-80mm range?
>
> I took this Saturn-off-the-Lunar-Limb shot using an older Orion 80mm
F/6.25
> Achromat:
>
> http://www.pswalsh.com/astropages/one.htm
>
> The camera was a 2 megapixel Leica Digilux on a homemade adapter ($3 worth
> of plumbing parts from home depot. The mount was Alt-Az (Bogen 410 geared
> head)
>
> A little post processing was used to diminish the purple fringe and then
> localized brightness and contrast boost to bring Saturn out some.
Thanks. From the ones I've seen so far (searching via Google) this has got
to be the clearest shot of Saturn I've ever seen with a small refractor. The
rest all look like fuzzy blobs.
How long was the exposure on this?
Thanks again,
> -Paul S. Walsh
--
Ioannis
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Date: 24 Jul 2006 12:24:56
From: Paul S. Walsh
Subject: Re: Astrophotos with smaller refractors?
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> "Ioannis" asked:
> How long was the exposure on this?
Don't know the precise exp. but, as with most digitallly taken lunar or
planetary shots, I'm sure it was just some fraction of a second. With that
camera I always let the auto feature handle the exposure timing after I set
the aperture overide based on what I was seeing in the LED but I'm sure it
was exceedingly brief. I do remember I had to crank up the relative
brightness of that area in post just to see Saturn at all in the raw image.
I still have the also-rans in a folder some where.
Around here (the Pacific NW) scopes and cameras are not usually the biggest
hinderance to quality images (we all have plenty of cloud time to sit around
in our imaging SIGs and talk about HOW to take the shots :-), its the decent
seeing we have to be so patient for and never arrives.
-PSW
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Date: 24 Jul 2006 10:22:15
From: Stephen Paul
Subject: Re: Astrophotos with smaller refractors?
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AM wrote:
>
> Personally, I preffer the M 51 shot you have up.
> Just me, but it is very nice, and in focus IMHO.
> (the stiletto works well)
>
Thanks.
I considered entering it into the SCT user photo contest.
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Date: 26 Jul 2006 10:42:13
From: mx
Subject: Re: Astrophotos with smaller refractors?
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Ioannis wrote:
> Does anyone have any links to astrophotos (digital/film) taken with smaller
> cheapo refractors in the 60-80mm range?
>
> I would like to get an idea how such a telescope performs when properly
> (equatorially) guided.
There is a Yahoo group called 80f5 which, predictably, is devoted to
the ubiquitous Synta ST80 achro. You can't get much mas cheapo than
that.
There are several albums of photos in both the "photos" and "files"
areas of the menu. Some look pretty good (e.g. the Omega Centauri at
http://ph.groups.yahoo.com/group/80f5/photos/view/6c70?b=1) while
others dramatically show the out of focus color (e.g. the Horsehead
nebula in http://groups.yahoo.com/group/80f5/files/From_Chile/)
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