|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
ASTRO: Sharpless 2-157
I took some frames for this image in three nights, but due to clouds, dew
etc only the data from one night was usable. Taken from the middle of Berlin with a Skywatcher ED80 with 0,85 reducer on a Skywatcher H-EQ5 Synscan mount, guided through the finderscope with Lodestar/AstroArt, 6x20 minutes Halpha, 4x20 minutes OIII (Baader filters). http://ccd-astronomy.de/temp4/Sh2-157colourgut.jpg Stefan |
#2
|
|||
|
|||
ASTRO: Sharpless 2-157
On 11/14/2010 4:33 PM, Stefan Lilge wrote:
I took some frames for this image in three nights, but due to clouds, dew etc only the data from one night was usable. Taken from the middle of Berlin with a Skywatcher ED80 with 0,85 reducer on a Skywatcher H-EQ5 Synscan mount, guided through the finderscope with Lodestar/AstroArt, 6x20 minutes Halpha, 4x20 minutes OIII (Baader filters). http://ccd-astronomy.de/temp4/Sh2-157colourgut.jpg Stefan Nice wide field of this one. I can only image the very bright blob in the core. You also picked up one of my favorite visual clusters, NGC 7510. Too me it looks like a broadhead arrow point with three razor edges. That's lost in most images however. Yours picks it up fairly well however. Is the reducer also a flattener? Rick -- Correct domain name is arvig and it is net not com. Prefix is correct. Third character is a zero rather than a capital "Oh". |
#3
|
|||
|
|||
ASTRO: Sharpless 2-157
I imaged this one with my f4.5 90mm scope. I overexposed or
overprocessed and had horrendous gradients. Would have been happy if mine had turned out half as well as yours did. On Sun, 14 Nov 2010 23:33:23 +0100, "Stefan Lilge" wrote: I took some frames for this image in three nights, but due to clouds, dew etc only the data from one night was usable. Taken from the middle of Berlin with a Skywatcher ED80 with 0,85 reducer on a Skywatcher H-EQ5 Synscan mount, guided through the finderscope with Lodestar/AstroArt, 6x20 minutes Halpha, 4x20 minutes OIII (Baader filters). http://ccd-astronomy.de/temp4/Sh2-157colourgut.jpg Stefan |
#4
|
|||
|
|||
ASTRO: Sharpless 2-157
Is the reducer also a flattener?
Rick, the reducer also flattens the image. The good thing about the Skywatcher EDs is that they have a specialised reducer for each scope, so I have a fitting reducer/flattener for the ED 80 and a different one for the ED120. That's a far better approach than other makes (e.g. William) that sell "universal" flatteners. The Skywatcher flatteners work well for chips up to APS-C size (typical DSLR chip), I never had any larger chips, so I can't tell if they give good stars for a 35mm chip. Stefan |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
ASTRO: Sharpless 2-132 | Stefan Lilge | Astro Pictures | 3 | January 24th 10 04:17 AM |
ASTRO: Sharpless 2-119 | Stefan Lilge | Astro Pictures | 3 | August 18th 09 03:23 PM |
ASTRO: Sharpless 2-235 | Rick Johnson[_2_] | Astro Pictures | 1 | June 10th 09 08:46 PM |
ASTRO: Sharpless 228 | Rick Johnson[_2_] | Astro Pictures | 1 | March 21st 09 11:40 PM |
ASTRO: Another Sharpless: SH2-54 in Halpha | Richard Crisp[_1_] | Astro Pictures | 1 | August 13th 07 04:13 PM |