· Get a Cloudy Nights T-Shirt · Submit a Review / Article    Click here if you are having trouble logging into the forums Privacy Policy | Please read our Terms of Service | Signup and Troubleshooting FAQ | Problems? PM a Red or a Green Gu.... uh, User   You are not logged in. [Login] Forum Archives · Entrance · Main Index · Search · New user · Who's Online FAQ · Calendar Astrophotography and Sketching >> Beginning and Intermediate Imaging Previous   Index   Next   Flat   freestar8n sage Reged: 10/12/07 Posts: 396 Re: F-Ratio Myth (And You)       06/13/09 02:40 PM Edit   Reply   Quote   Quick Reply:   The SNR at each pixel is the same, and as long as you don't blow up or reduce the image size, and present all images at the same pixel scale, that is the SNR value that will matter most for depth and overall quality of the view. In other words- at the same f/ratio but smaller aperture, the image will be smaller but just as bright. It will lose some resolution by being smaller. Frank Post Extras       Entire thread Subject Posted by Posted on F-Ratio Myth (And You) Kolenka 05/05/09 03:15 AM Re: F-Ratio Myth (And You) DonR   05/05/09 11:47 PM Re: F-Ratio Myth (And You) lernerda   06/05/09 09:57 AM Re: F-Ratio Myth (And You) freestar8n   06/05/09 11:23 AM Re: F-Ratio Myth (And You) Jimmy2K63   06/09/09 02:05 PM Re: F-Ratio Myth (And You) freestar8n   06/09/09 03:26 PM Re: F-Ratio Myth (And You) freestar8n   06/09/09 05:17 PM Re: F-Ratio Myth (And You) WarrenS   06/09/09 06:06 PM Re: F-Ratio Myth (And You) Jared   06/09/09 07:20 PM Re: F-Ratio Myth (And You) Jimmy2K63   06/09/09 10:10 PM Re: F-Ratio Myth (And You) NigelM   06/10/09 04:59 AM Re: F-Ratio Myth (And You) freestar8n   06/10/09 08:28 AM Re: F-Ratio Myth (And You) Jared   06/10/09 01:10 PM Re: F-Ratio Myth (And You) freestar8n   06/10/09 01:33 PM Re: F-Ratio Myth (And You) Jared   06/10/09 04:09 PM Re: F-Ratio Myth (And You) freestar8n   06/10/09 08:04 PM Re: F-Ratio Myth (And You) Jared   06/10/09 10:59 PM Re: F-Ratio Myth (And You) freestar8n   06/11/09 08:52 AM Re: F-Ratio Myth (And You) Jared   06/11/09 09:37 AM Re: F-Ratio Myth (And You) Galaxyhunter   06/11/09 01:16 PM Re: F-Ratio Myth (And You) DaemonGPF   06/12/09 09:22 AM Re: F-Ratio Myth (And You) freestar8n   06/12/09 11:40 AM Re: F-Ratio Myth (And You) Arkalius   06/13/09 03:56 AM Re: F-Ratio Myth (And You) freestar8n   06/13/09 09:18 AM Re: F-Ratio Myth (And You) Galaxyhunter   06/13/09 11:28 AM Re: F-Ratio Myth (And You) Arkalius   06/17/09 01:16 AM Re: F-Ratio Myth (And You) Jimmy2K63   09/23/09 09:43 AM Re: F-Ratio Myth (And You) saadabbasi   09/24/09 11:41 AM Re: F-Ratio Myth (And You) russ_watters   09/25/09 07:23 PM Re: F-Ratio Myth (And You) freestar8n   06/13/09 02:40 PM Re: F-Ratio Myth (And You) Galaxyhunter   06/13/09 04:26 PM Re: F-Ratio Myth (And You) freestar8n   06/13/09 06:41 PM Re: F-Ratio Myth (And You) Jared   06/12/09 10:23 AM Re: F-Ratio Myth (And You) Dean   06/05/09 10:59 AM Re: F-Ratio Myth (And You) lineman_16735   05/06/09 01:46 AM Re: F-Ratio Myth (And You) *DELETED* gavinm   05/06/09 01:26 AM Re: F-Ratio Myth (And You) DonR   05/06/09 01:41 PM Re: F-Ratio Myth (And You) gavinm   05/06/09 08:10 PM Re: F-Ratio Myth (And You) DonR   05/06/09 08:20 PM Re: F-Ratio Myth (And You) paulobao   05/18/09 04:17 PM Re: F-Ratio Myth (And You) Kolenka   05/18/09 05:47 PM Re: F-Ratio Myth (And You) gavinm   05/18/09 10:29 PM Re: F-Ratio Myth (And You) Kolenka   05/19/09 01:16 AM Re: F-Ratio Myth (And You) gavinm   05/19/09 01:55 AM Re: F-Ratio Myth (And You) paulobao   05/19/09 03:15 AM Re: F-Ratio Myth (And You) Kolenka   05/19/09 10:20 AM Re: F-Ratio Myth (And You) Qkslvr   05/19/09 10:42 AM Re: F-Ratio Myth (And You) Arkalius   05/20/09 02:27 AM Re: F-Ratio Myth (And You) Qkslvr   05/20/09 07:56 AM Re: F-Ratio Myth (And You) Galaxyhunter   05/20/09 06:45 AM Re: F-Ratio Myth (And You) gavinm   05/20/09 07:42 PM Re: F-Ratio Myth (And You) Arkalius   05/20/09 07:36 PM Re: F-Ratio Myth (And You) paulobao   05/20/09 05:51 AM Re: F-Ratio Myth (And You) russ_watters   05/18/09 10:05 PM Re: F-Ratio Myth (And You) jgraham   05/18/09 05:19 PM Re: F-Ratio Myth (And You) Kolenka   05/05/09 11:57 PM Re: F-Ratio Myth (And You) Nocturnal   05/06/09 12:07 AM Re: F-Ratio Myth (And You) lineman_16735   05/06/09 01:49 AM Re: F-Ratio Myth (And You) Arkalius   05/06/09 06:14 AM Re: F-Ratio Myth (And You) tiggere   05/06/09 08:14 AM Re: F-Ratio Myth (And You) lineman_16735   05/06/09 09:46 AM Re: F-Ratio Myth (And You) Dean   05/06/09 10:46 AM Re: F-Ratio Myth (And You) lineman_16735   05/06/09 01:04 PM Re: F-Ratio Myth (And You) tiggere   05/05/09 08:05 AM Re: F-Ratio Myth (And You) Miguel Lopes   05/05/09 08:47 AM Re: F-Ratio Myth (And You) Kolenka   05/05/09 11:22 AM Re: F-Ratio Myth (And You) Miguel Lopes   05/05/09 08:24 PM Re: F-Ratio Myth (And You) Dean   05/06/09 11:44 AM Re: F-Ratio Myth (And You) Jared   05/21/09 01:27 AM Re: F-Ratio Myth (And You) Arkalius   05/21/09 08:24 PM Re: F-Ratio Myth (And You) Jared   05/22/09 10:06 AM Re: F-Ratio Myth (And You) Qkslvr   05/22/09 11:29 AM Re: F-Ratio Myth (And You) Jared   05/22/09 05:36 PM Re: F-Ratio Myth (And You) Arkalius   05/22/09 07:31 PM Re: F-Ratio Myth (And You) Jared   05/24/09 01:17 PM Re: F-Ratio Myth (And You) Arkalius   05/24/09 07:47 PM Re: F-Ratio Myth (And You) Dean   05/21/09 10:03 PM Re: F-Ratio Myth (And You) Arkalius   05/22/09 12:21 AM Re: F-Ratio Myth (And You) Dean   05/22/09 11:46 AM Re: F-Ratio Myth (And You) Qkslvr   05/22/09 01:16 PM Re: F-Ratio Myth (And You) Dean   05/22/09 03:09 PM Re: F-Ratio Myth (And You) Qkslvr   05/22/09 07:42 AM Re: F-Ratio Myth (And You) DonR   05/05/09 01:06 PM Re: F-Ratio Myth (And You) Dean   05/06/09 10:25 AM Re: F-Ratio Myth (And You) lineman_16735   05/05/09 12:07 PM Re: F-Ratio Myth (And You) Nocturnal   05/05/09 01:06 PM Re: F-Ratio Myth (And You) DonR   05/05/09 12:59 PM Re: F-Ratio Myth (And You) WarrenS   05/05/09 12:27 PM Re: F-Ratio Myth (And You) gavinm   05/05/09 04:51 PM Re: F-Ratio Myth (And You) freestar8n   06/04/09 12:20 PM Re: F-Ratio Myth (And You) HunterofPhotons   06/05/09 01:11 PM Re: F-Ratio Myth (And You) freestar8n   06/06/09 07:45 AM Re: F-Ratio Myth (And You) HunterofPhotons   06/06/09 01:02 PM Re: F-Ratio Myth (And You) freestar8n   06/06/09 03:13 PM Re: F-Ratio Myth (And You) HunterofPhotons   06/07/09 01:17 PM Re: F-Ratio Myth (And You) freestar8n   06/07/09 02:06 PM Re: F-Ratio Myth (And You) HunterofPhotons   06/08/09 11:37 AM Re: F-Ratio Myth (And You) freestar8n   06/08/09 12:06 PM Re: F-Ratio Myth (And You) Kolenka   06/08/09 12:39 PM Re: F-Ratio Myth (And You) freestar8n   06/08/09 01:38 PM Re: F-Ratio Myth (And You) freestar8n   06/08/09 04:28 PM Re: F-Ratio Myth (And You) Jared   06/08/09 07:02 PM Re: F-Ratio Myth (And You) freestar8n   06/08/09 11:04 PM Re: F-Ratio Myth (And You) Galaxyhunter   06/08/09 07:42 PM Re: F-Ratio Myth (And You) Dean   06/08/09 08:31 PM Re: F-Ratio Myth (And You) Galaxyhunter   06/08/09 10:31 PM Re: F-Ratio Myth (And You) Dean   06/09/09 12:42 AM Re: F-Ratio Myth (And You) gavinm   06/09/09 01:24 AM Re: F-Ratio Myth (And You) Dean   06/09/09 11:24 AM Re: F-Ratio Myth (And You) Qkslvr   06/09/09 09:12 AM Re: F-Ratio Myth (And You) freestar8n   06/09/09 10:07 AM Re: F-Ratio Myth (And You) Jared   06/09/09 12:35 PM Re: F-Ratio Myth (And You) freestar8n   06/09/09 01:41 PM Re: F-Ratio Myth (And You) Jared   06/09/09 05:58 PM Re: F-Ratio Myth (And You) Dean   06/09/09 12:02 PM Re: F-Ratio Myth (And You) freestar8n   06/09/09 01:10 PM Re: F-Ratio Myth (And You) Qkslvr   06/09/09 11:53 AM Re: F-Ratio Myth (And You) Qkslvr   06/08/09 05:00 PM Re: F-Ratio Myth (And You) freestar8n   06/08/09 05:07 PM Re: F-Ratio Myth (And You) Doubleglaze   06/07/09 02:53 AM Re: F-Ratio Myth (And You) freestar8n   06/07/09 09:21 AM Re: F-Ratio Myth (And You) Galaxyhunter   06/05/09 02:55 PM Re: F-Ratio Myth (And You) freestar8n   06/06/09 07:56 AM Re: F-Ratio Myth (And You) Galaxyhunter   06/06/09 01:26 PM Re: F-Ratio Myth (And You) Arkalius   06/06/09 01:27 AM Re: F-Ratio Myth (And You) bbasiaga   05/05/09 06:23 PM Re: F-Ratio Myth (And You) Arkalius   05/05/09 06:19 PM Re: F-Ratio Myth (And You) Kolenka   05/05/09 08:18 PM Re: F-Ratio Myth (And You) Kolenka   05/05/09 12:32 PM Re: F-Ratio Myth (And You) lineman_16735   05/05/09 12:11 PM Re: F-Ratio Myth (And You) Nocturnal   05/05/09 09:05 AM Re: F-Ratio Myth (And You) DonR   05/05/09 09:32 AM Re: F-Ratio Myth (And You) tiggere   05/05/09 10:47 AM Extra information 6 registered and 5 anonymous users are browsing this forum. 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