Search found 558 matches

by turfpit
Tue Jan 22, 2019 7:29 pm
Forum: How do I?
Topic: Creating dark frames
Replies: 3
Views: 15

Re: Creating dark frames

Dave

Some background info here viewtopic.php?f=35&t=254 which you may find useful.

Dave
by turfpit
Tue Jan 22, 2019 1:05 pm
Forum: General Discussions
Topic: DIY Cheapish Self Powered Flat Panel
Replies: 9
Views: 112

Re: DIY Cheapish Self Powered Flat Panel

Nick Thanks for the link, an interesting article targeted at very advanced/experienced imagers. If I had come across it when I was first looking into flat frames, it would have saved me a lot of time as I would probably have given up and sold all my equipment :lol: . This must be one of the 5 confli...
by turfpit
Tue Jan 22, 2019 11:39 am
Forum: General Discussions
Topic: DIY Cheapish Self Powered Flat Panel
Replies: 9
Views: 112

Re: DIY Cheapish Self Powered Flat Panel

Nick At the moment it would just be nice to be able to shoot something that would require the us of flats other than photos of clouds. Agreed :) Surely the generation of a flat frame relies on a (more or less) centralised histogram? Below is an extract from the Nebulosity 4 manual. I have put my tru...
by turfpit
Tue Jan 22, 2019 9:43 am
Forum: General Discussions
Topic: DIY Cheapish Self Powered Flat Panel
Replies: 9
Views: 112

Re: DIY Cheapish Self Powered Flat Panel

Nick I aim for around 40% on the histogram for my flat exposure. Mono flat ~16.7ms Colour flat ~78ms (I use Luminance channel, don't care about colour balance) Ha filter ~15s For my 8" panel, exposure is ~250ms The panels I use have worked without any dimming material placed in front. I did have the...
by turfpit
Tue Jan 22, 2019 8:17 am
Forum: Bug Reports
Topic: "Flip Both" affects color in RAW8 mode
Replies: 2
Views: 27

Re: "Flip Both" affects color in RAW8 mode

Well done Larry for working it out. Take a simple 2x2 grid RGGB: RG GB Flip it top to bottom gives: GB RG Flip left to right: BG GR Hence matrix becomes: BGGR For anyone meeting this for the first time see https://forums.sharpcap.co.uk/viewtopic.php?f=35&t=254 The doc that keeps on giving - > 3500 v...
by turfpit
Mon Jan 21, 2019 7:36 am
Forum: Bug Reports
Topic: SC doesn't work with Gemini Telescope.NET ASCOM driver
Replies: 22
Views: 979

Re: SC doesn't work with Gemini Telescope.NET ASCOM driver

Greg
Winter used to be fun... wonder what happened?
We all got (much) older …

Dave
by turfpit
Sun Jan 20, 2019 1:08 pm
Forum: General Discussions
Topic: DIY Cheapish Self Powered Flat Panel
Replies: 9
Views: 112

Re: DIY Cheapish Self Powered Flat Panel

I built this for my 66mm refractor. Hangs over the end of the scope, battery powered and can be used in the field. flat-panel-on.JPG flat-panel-off.JPG flat-panel-back.JPG 100mm EL panel + inverter = £14. 2 pieces of 2mm plasticard, nuts, bolts, washers, plastic rod, Gorilla Glue around £20 total. h...
by turfpit
Tue Jan 15, 2019 2:05 pm
Forum: How do I?
Topic: Sharpcap and Apple
Replies: 2
Views: 37

Re: Sharpcap and Apple

Melvin If you are set on using a native Mac OS then possible options are: Nebulosity http://www.stark-labs.com/ AstroImager http://cloudmakers.eu/astroimager/ CCDciel https://www.ap-i.net/ccdciel/en/start The first 2 options have a cost but allow free trials which would enable you to check out your ...
by turfpit
Tue Jan 15, 2019 1:51 pm
Forum: Deep Sky Imaging
Topic: Another Offset Question
Replies: 76
Views: 4581

Re: Another Offset Question

I found this interesting article, which I believe is relevant to this thread, on the QHY website https://www.qhyccd.com/uploadfile/2018/1106/20181106030334403.pdf Written by this gentleman I believe https://www.sbscientific.com/qhy/qiu-hongyun/ Not an easy read but worth the effort for anyone who wa...
by turfpit
Fri Jan 11, 2019 9:29 pm
Forum: How do I?
Topic: Brain Function and Narrow Band
Replies: 25
Views: 267

Re: Brain Function and Narrow Band

Nick I looked up your scope - very nice piece of kit. It looks like it is an f/6 scope. An f/2 scope would be around 10x faster than an f/6. This roughly means that if you capture 60s of data with your scope then the f/2.8 lens that Roger Clark uses could capture the same amount of data in around 6s...