Transparent moon - Lunar Observing and Imaging - Cloudy Nights
2016年8月21日 · Transparent moon - posted in Lunar Observing and Imaging: According to what I understand there is a growing number of people who believes in a flat earth theory. Those are not limited to a certain religious group and present many arguments for their belief, some of them really hilarious in my opinion. I also mean that some of the arguments is possible to refute …
Narrowband imaging with a near full moon? - Cloudy Nights
2013年7月25日 · with a 5nm Ha and the full-ish moon within 40 degrees of the veil nebula, i was seeing background ADUs in the 5000s vs. about 800 with no moon (20min exposure @ f/2.8) the faint stuff is definitely a bit swamped by the moonglow.
Triton - General Observing and Astronomy - Cloudy Nights
2023年10月10日 · Triton - posted in General Observing and Astronomy: Tonight, I saw Neptunes moon Triton. In my sixty years of scoping/stargazing, I had never attempted to see a moon of Neptune or Uranus; simply assuming them to be too faint to see in the scopes I had owned/used. A few nights back, the sky was transparent and steady. I was looking at Saturn through an 8 …
Where and how to print astrophotography pictures?
2021年9月8日 · I then decided to make a light box from a 3D photo frame and then used an adhesive LED strip around the inside frame so that the photo sits flush to the glass and is lit from behind. The photo paper is surprisingly transparent to create a well illuminated effect and the glossy paper is great for the day time.
A Beginner's Guide to Cartes Du Ciel - Cloudy Nights
2008年6月14日 · Page 1 of 2 - A Beginners Guide to Cartes Du Ciel - posted in Astronomy Software & Computers: Hey guys.I just read a post from a rather confused new member who is having trouble with CDC. Id like to start this post as a simple how-toIf anyone uses CDC and wants to help out, please include step by step instructions on how to do something anything, in …
Astronomik H-Alpha Clip-In Filter for DSLRs Reviewed
2022年4月13日 · Having the Moon just outside the field will still introduce ugly gradients. A demo image taken in cloud and with the Moon off frame in Taurus, with the Ra and 28-70mm lens at f/2 and 34mm and at ISO 1600. A single image taken Feb 8, 2022. Processed only in Camera Raw with Adobe Monochrome profile. Credit: Alan Dyer
Tests of 9 Different Chromatic Aberration Filters - Articles
2013年9月21日 · The test were done from a orange Zone under very transparent skies on a 8 day old moon. I chose the moon as being so bright, CA should be at its worst. A search of the Cloudy Nights archives (under refractor) turned up a chart entitled 'Equivalent Chromatic Aberration of Achromatic Refractors'. What this chart indicates is that if the scopes CA ...
Moons of Uranus - Solar System Observing - Cloudy Nights
2012年9月19日 · Moonlight or a little artificial light pollution doesn't do too much damage to this sort of observation but transparent, haze free air with steady seeing is essential, as is a fairly high magnification (20 - 25x per inch of aperture), clean optics to reduce glare from the planet and skill at use of averted vision.
Siebert eyepieces - Cloudy Nights
2024年11月27日 · They were quite nice! Great ER & ergonomics, lightweight, and optically very transparent _____ This. I have been using Siebert's for years, in fast my newts, to this day, F/4(tiny) to f/5 focal ratios, without coma correction, in my circumstances. For fast focal ratios and 70º fov, the 6 element Ultra's work best.
Recommendations for a Minimalist EQ Mount - Cloudy Nights
2024年12月1日 · By the way, if those skies are dark and transparent enough, you’ll be able to see M31 naked eye. From a city, however, it’ll be just the barest smudge in the telescope. The Moon, the planets and bright double stars are still good targets from a city though, with possibilities expanding from there with the darker and more transparent the ...