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About Filroden

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    Sub Dwarf
  • Birthday August 26

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    East Cleveland

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  1. Competition details: Forum to post images:
  2. I liked the first version but this is amazing! And only 16 minutes? We're your subs 30s or less? If so I'd put that into the competition.
  3. That's a nice result. Lovely star colours and you're just picking up the reds in the outer parts of the nebula. Do you take new flats after every session. Whilst you can re-use flats if you're certain camera and scope remain oriented, this usually applies if you're using a fixed set-up. If you're tearing down the equipment each session i would recommend trying with fresh flats. You're showing some trailing. What exposure length are you using? You may be able to take shorter exposures and integrate more of them to get the same total integration time. This might help reduce trailing and loss of exposures. I would never use an exposure that gave less than 80% results. We have far too few clear nights to be throwing away subs!
  4. Now you're using an EQ mount and have PHD working I would recommend trialling SGPro. It will platesolve out of the box allowing you to precisely centre on a frame taken on a previous night. It will also work if you move to a mono camera with filter wheel. It also will manage focusing if you ever decide to automate. Its interface and terminology can take a while to figure out but there is logic in its apparent madness! It's definitely made imaging easier. I fire up SGPro, connect camera, filter wheel, focused and mount. Fire up PHD and connect guide camera. Then I'm ready to start. i previously used BackyardEOS which was easier to use but is Canon specific. The only free capture software I've used were Sharpcap and Firecapture but these were more designed for short exposures. PixInsight is starting to implement image capture but I don't think it will ever catch up with dedicated capture software.
  5. I've looked at it but the wider nebula goes well beyond my fov. I could look at just the trunk though. Good call.
  6. Looking at it, it seems the best targets for me might be around Cygnus, Cepheus and Cassiopeia. Do you think the Bubble will be strong enough in Ha to overcome the lighter sky? If not, then my camera/scope frames the North America Nebula/Pelican quite nicely. The Veil might be too low still. Thankfully, they are almost all circumpolar for me, so I can gather RGB once I get true darkness back in August. I didn't think that the Oiii filters were quite as moon proof as Ha filters, even at 3nm? It's next on my shopping list, along with an 8 filter wheel, but might have to wait until autumn.
  7. Light pollution tends to peak at certain wavelengths whereas sunlight/moonlight is bright across the spectrum.
  8. I think I'll give narrowband a try during nautical darkness. If the Ha filter can cope with moonlight I'm hoping it's also effective on a moonless but not quite dark night for the same reasons.
  9. It appears I may have a spell of clear nights coming; the first since April, when I last had astronomical darkness. Below is my light chart for my latitude. The darkest I get now is 3 hours of nautical darkness with an additional almost 3 hours of civil darkness. My question: is it worth imaging at all? If so, what and when? When would you start collecting narrowband images? Civil, nautical or only astronomical darkness? What about LRGB?
  10. Here's my attempt at HaRGB The luminance is largely Ha with some contribution from RGB, the colour is the reverse. I think it was a ratio of 33% Ha into RGB and 66% Ha into lum. I didn't get the stars right but the entire image shares the same panel. Had I an Oiii filter I think it would have served to enhance the central detail. What did your RGB image look like?
  11. if you're trying to achieve a true balance I think you'd be better following Olly's technique of blending the narrowband into the RGB to enhance the structure in colour and luminance. I'm in the camp that finds RGB stars in a bicolour image 'odd'. I'd rather see the stars as monochrome than in an alternate palette. However, this is just my subjective preference. I couldn't criticise your actual result which is good!
  12. I don't have an answer but I remain logged into three devices, all of which are used regularly so I don't think there is a limit.
  13. Congratulations on your big day! I think the stars shine on your wedding
  14. Read noise reduces with increasing gain (you're amplifying the signal so the fixed read noise represents a smaller percentage) and dynamic range also reduces with increasing gain, so you're always is a trade-off. Jon Rista on cloudynights has put up a lot of information about CMOS chips (using the ZWO ASI1600) on read noise, gain, etc. I suspect the principles will apply to any CMOS though the read noise will be different.