Search found 1021 matches

by oopfan
Wed Jul 21, 2021 5:35 am
Forum: Other Astro Imaging
Topic: Spectrum of the Ring Nebula
Replies: 0
Views: 104

Spectrum of the Ring Nebula

An interesting NASA APOD today: https://apod.nasa.gov/apod/ap210721.html The identity of the three rings: Left side: Ha + NII Middle: OIII Right side: Normal visual appearance OIII is very strong in Planetary Nebulae, even stronger than Ha in many cases. However, OIII tends to be weak in regular Emi...
by oopfan
Mon Jul 19, 2021 3:52 am
Forum: General Discussions
Topic: SharpCap Account Compromised ?
Replies: 2
Views: 53

Re: SharpCap Account Compromised ?

Sathya, https://www.iphonetricks.org/iphone-compromised-password-notification/ They say: Compromised Password Reasons In iOS 14 Safari will also recommend you to change your Password for an account in the following scenarios: Passkeys that you use multiple times. These will be labeled as Reused Pass...
by oopfan
Sat Jul 17, 2021 7:04 pm
Forum: Feature Suggestions
Topic: automatic choice of the best dark
Replies: 3
Views: 82

Re: automatic choice of the best dark

Back a couple years ago when I used an uncooled mono cam for AP, on cloudy nights I would set up the scope to capture darks all night. The next day, I'd group the frames by temperature. Often times it would take several nights to accumulate at least 30 frames per temperature. And of course, this is ...
by oopfan
Thu Jul 15, 2021 5:12 am
Forum: ZWO Cameras
Topic: Color Space, Bit Depth, and Exposure Time
Replies: 3
Views: 115

Re: Color Space, Bit Depth, and Exposure Time

Hi David,

Total Exposure (aka Total Integration Time) will never burn out whites. What will burn out whites, if you're not careful, is your Per Frame Exposure. The process of stacking frames is to "push back" the noise, not to grow highlights.

Brian
by oopfan
Mon Jul 12, 2021 5:17 pm
Forum: How do I?
Topic: Questions about Japanese localization of SharpCapUserManual
Replies: 154
Views: 12645

Re: Questions about Japanese localization of SharpCapUserManual

I agree with Watanabe san, the "の" is awkward. There are two cases where "の" should be used: (1) when showing possession, and (2) when showing hierarchy. But in each case, "の" glues together nouns, pronouns, or noun phrases. In the original document "run recently u...
by oopfan
Fri Jul 09, 2021 1:15 pm
Forum: General Discussions
Topic: Photometry and Spectroscopy
Replies: 4
Views: 112

Re: Photometry and Spectroscopy

Bob,

The AAVSO has software, but I use AstroImageJ (free). What's neat is that you can set it up to automatically calibrate frames when they arrive from your data capture software (SC), perform photometry and plot the star's light curve.

Brian
by oopfan
Fri Jul 09, 2021 11:58 am
Forum: General Discussions
Topic: Photometry and Spectroscopy
Replies: 4
Views: 112

Re: Photometry and Spectroscopy

Hi Bob, I've done quite a bit with Variable Stars and Exoplanets. I recommend starting with a question: Am I in it to have fun, or to be serious? By serious I mean measuring magnitudes with such precision that your data can be combined with other people's data. And by fun I mean that capturing the s...
by oopfan
Thu Jul 08, 2021 2:12 pm
Forum: How do I?
Topic: Questions about Japanese localization of SharpCapUserManual
Replies: 154
Views: 12645

Re: Questions about Japanese localization of SharpCapUserManual

Internationalization is a large undertaking. It's been 2 weeks since I started translation of my web app to support Japanese, French, and German. I figure one or two more days of work. The most important lesson I learned is to reject the use of jargon if at all possible. For example, when I began wr...
by oopfan
Fri Jul 02, 2021 12:28 am
Forum: Polar Alignment
Topic: SharpCap Polar Alignment with PHD2 complaint.
Replies: 7
Views: 174

Re: SharpCap Polar Alignment with PHD2 complaint.

Hi Stephen, We are in the same boat with respect to weather. It's been nearly 2 weeks for me. Here are the 3 things that greatly improved my PA and Guiding: 1. Cable Management. I made a video here: https://rumble.com/vheku9-brians-astrophotography-tips-cable-management.html 2. Glued the guide scope...
by oopfan
Thu Jul 01, 2021 3:49 am
Forum: Polar Alignment
Topic: SharpCap Polar Alignment with PHD2 complaint.
Replies: 7
Views: 174

Re: SharpCap Polar Alignment with PHD2 complaint.

Hi Stephen, Thanks for the up-vote. May I ask, how long do you let the Guiding Assistant run? I give mine a full turn of the worm gear which is about 500 seconds. Even when I have excellent PA, the assistant initially says that it is off by several arc-minutes. It takes a few minutes for it to conve...