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PeterW

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  1. I picked up some secondhand Leica 8x20 trinovid, the smallest of this class of binos. Views narrower than I prefer, but they take up no space in my jacket pocket, so easy to carry all the time, never know when they might come in handy. peter
  2. Just seen it in my elderly 15x70 from suburbia, will try to see it as often as I can till it disappears into the southern hemisphere. Peter
  3. If you want hydrogen nebulae then a narrowband Hbeta can deliver, otherwise a narrow oiii can be good. There are some good CN threads: eg https://www.cloudynights.com/topic/722322-pushing-the-filter-envelope-observing-galactic-nebulae-with-handheld-binoculars-under-suburban-skies/ c.hay has done a lot of testing. peter
  4. Using the full 7mm pupil can begin to show worse stars as your eye lens has worse figure for larger pupil diameters. I’d get a trigger grip and monopod like this… https://binocularsky.com/binoc_mount.php stabilise the 15x70, to improve the view. As others suggest a lighter 8x would be useful, could also be carried around and used in the daytime. peter
  5. I’ve always been a right eye observer, but when the exit pupil gets small, the floaters start to get annoying. Well tonight I decided to get the other eye have a go, and it seems suffers less from floaters. Previously I’d found it harder to use as it’s my non-dominant eye. Quick session as there were clouds about and so I didn’t get the maps out. Saw a fine shadow down the southern edge of the alpine valley and a couple of the small craters along catena Davey with the 127Mak, which seems good, so maybe left eye for the moon from now on! Peter
  6. “We come from the dark side”, no-one suspected anything… just a few blokes staring at a wall looking though “eyepieces”. Very useful “planning session” too. Peter
  7. What size scope do you need to benefit from it? Peter
  8. The dark sky reserve will be posting annual updates to their SQM survey and will list multiple good sites in the dark sky area. Local groups will know more and if the council is active in reducing the light pollution, sounds like a good plan to move, though you have to watch out for neighbours with crazy LED flood fittings that can cause issues. peter
  9. The S&T field atlas of the moon (available in normal and mirror versions) are very good for overviews as other atlas provide too small a field of view. Some of the Apollo era charts are surprisingly detailed, though the coverage isn’t complete. The duplex atlas is the current one to get, decent and available (unlike many others!) For things to observe the lunar 100 is good, “features of the near side of the moon” by John Moore is also useful as it provides charts to find all the different types of feature you might be interested and want to find more of… domes, rimae etc. (I’ve think got a spare copy of the 1st edition going spare). Peter
  10. Given the focal length I wonder if the normal starsense (the auto set-up, non auto guider model) could do a reasonable job. peter
  11. https://www.celestron.com/products/celestron-origin-intelligent-home-observatory Celestron a big news, a 6” RASA as some predicted. Lots more options for all of us! Peter
  12. new one from Unistellar just announced at CES. https://www.digitalcameraworld.com/news/unistellar-reveals-new-odyssey-and-odyssey-pro-smart-telescopes-at-ces-2024 peter
  13. H-beta is good, works on more nebulae than people sometimes believe. I’ve used a pair on my binoculars to see hydrogen nebulae from a suburban location. Need to shield your eye from all stray light as the filter blocks a lot. peter
  14. Similarly I am waiting for some more reviews, seems to do best with larger optics than I have available?! Peter
  15. Short exposures using an intensifier will also just look like snow…. You need to integrate for a little while to see the inage, using fast optics maximises the brightness. If you use too much magnification you can also starve the intensifier and get a similar result. This is why people take longer exposures with NV, to smooth the noise to get a smooth image. The reason we can see hydrogen nebulae normally isn’t that they’re faint it’s that our eyes are rubbish at seeing deep red light. if you want more detail on nebulae then why not use the tried and trusted reconciliation route, measure the spread and remove it. I am sure it’s only a matter of time before some amateur makes a laser guide star system, though sodium orange is not an easy colour to create. Then you could detect and correct the blurring in real time. Peter
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