SharpCap Forums

Dave

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

Dave

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...

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...

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...

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...

Greg

Winter used to be fun... wonder what happened?

We all got (much) older …

Dave

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...

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 ...

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...

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...