AstronomyUkraine Posted April 21 Share Posted April 21 A new piece of very good software from RC Astro, and it's free. Basically you input your OTA numbers and the tool will calculate if your setup is over-sampled, under-sampled or just right. The calculation will also show if your images will benefit from drizzle or binning. More info and access to the calculator is here. https://www.rc-astro.com/resources/MTFAnalyzer/ Quote Link to comment Share on other sites More sharing options...
TerryMcK Posted April 22 Share Posted April 22 Thanks for linking Brian. It should help a lot of us imagers. Quote Link to comment Share on other sites More sharing options...
AstronomyUkraine Posted April 22 Author Share Posted April 22 2 hours ago, TerryMcK said: Thanks for linking Brian. It should help a lot of us imagers. Digging a little deeper, for those images that suffer from under-sampling, drizzle will effectively cure that, but removes contrast. The use of BlurXTerminator will restore the contrast. Quote Link to comment Share on other sites More sharing options...
RaDec Posted April 22 Share Posted April 22 I checked this out last night - another excellent tool from Russ. Thanks for pointing it out. The thting I struggle with is calculating seeing, which is quite essential if you play with the slider. This youtube video is quite helpful in explaining its use: 1 Quote Link to comment Share on other sites More sharing options...
AstronomyUkraine Posted April 23 Author Share Posted April 23 (edited) 20 hours ago, RaDec said: I checked this out last night - another excellent tool from Russ. Thanks for pointing it out. The thting I struggle with is calculating seeing, which is quite essential if you play with the slider. This youtube video is quite helpful in explaining its use: Finding your seeing for any location can be found easily on Meteoblue. It calculates the seeing for your location by the hour. https://www.meteoblue.com/en/weather/outdoorsports/seeing/london_united-kingdom_2643743 Edited April 23 by AstronomyUkraine 1 Quote Link to comment Share on other sites More sharing options...
AstronomyUkraine Posted April 23 Author Share Posted April 23 (edited) Someone asked me a question on Instagram last night regarding dual band filters, and how you would calculate the wavelength for such a filter. I had no answer to that, except maybe average out the Ha and OIII wavelength, which would give an answer of 575nm. Edited April 23 by AstronomyUkraine 1 Quote Link to comment Share on other sites More sharing options...
RaDec Posted April 23 Share Posted April 23 3 hours ago, AstronomyUkraine said: Finding your seeing for any location can be found easily on Meteoblue. It calculates the seeing for your location by the hour. https://www.meteoblue.com/en/weather/outdoorsports/seeing/london_united-kingdom_2643743 I tried that - it only applies to London, but I guess that's maybe close enough? Quote Link to comment Share on other sites More sharing options...
AstronomyUkraine Posted April 23 Author Share Posted April 23 (edited) 5 hours ago, RaDec said: I tried that - it only applies to London, but I guess that's maybe close enough? You can enter your own location. At the top centre/left, you will see a box marked location search. Just type in your location and it will find it. You can also see the strength of the jet stream in one of the columns, which will also affect seeing. Edited April 23 by AstronomyUkraine Quote Link to comment Share on other sites More sharing options...
TerryMcK Posted April 23 Share Posted April 23 This is the help link for seeing. https://content.meteoblue.com/en/private-customers/website-help/outdoor-and-sports/astronomy-seeing It shows the extra column headings which are absent from the current seeing table. Current below showing “index” Extra explanation column headings showing “seeing” column seen below Quote Link to comment Share on other sites More sharing options...
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