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Daytime IR pass filter comparison on moon from Ogikubo observatory

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#1 Ittaku

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Posted 24 October 2020 - 12:02 AM

I follow the Tokyo Ogikubo observatory twitter feed which posts regular interesting solar system captures and they've done a comparison using various IR pass filters capturing the moon in daylight that others might find informative. Whilst the post is in Japanese, the choice of filter and results are self-explanatory, and impressive. This forum doesn't allow me to link directly to the image, so the post containing the image is below:

 

https://twitter.com/...614603127521280


Edited by Ittaku, 24 October 2020 - 12:03 AM.

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#2 Tom Glenn

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Posted 24 October 2020 - 12:23 AM

Yes, those results are fairly self explanatory!  For daytime imaging, the problem is that contrast is completely washed away by the bright sky, and so anything that reduces the sky brightness can improve the outcome.  In this series, the eye is immediately drawn to the 800nm filter as having the best contrast of the bunch.  Unfortunately, these longer IR filters do reduce resolution (depending on your scope and image scale), and also change the exposure, so the results are always limited compared to imaging at night, but they can definitely salvage something decent if you must be imaging the Moon during the daytime.  



#3 spereira

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Posted 24 October 2020 - 12:47 PM

Moving to Lunar Observing & Imaging.

 

smp




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