Congratulations Dave and Leandro! Outstanding collaborative work.
Brian
Search found 1331 matches
- Tue May 07, 2024 12:07 pm
- Forum: Gallery
- Topic: NGC 3372, Ha/OIII 4-panel mosaic, Argentina/UK collaboration
- Replies: 2
- Views: 122
- Tue May 07, 2024 2:35 am
- Forum: Deep Sky Imaging
- Topic: Exposure Starting Point
- Replies: 8
- Views: 187
Re: Exposure Starting Point
Hi Jerry, 5 to 10-minute subs are hurting you more than helping. Stars blow out. Sky pollution takes up a lot of your dynamic range. Satellites and aircraft damage a large percentage of frames. It's not worth it but there is a better way. Reduce your exposure. SharpCap's "Brain" helps with...
- Mon May 06, 2024 10:49 am
- Forum: Deep Sky Imaging
- Topic: Exposure Starting Point
- Replies: 8
- Views: 187
Re: Exposure Starting Point
The magnitude of a DSO, for example a galaxy, is the average of the bright and faint parts integrated over an ellipse. Who determines the size of the ellipse? Some governing body. Therefore, if today Galaxy X is said to be 20th magnitude, and then tomorrow the governing body says the ellipse is larg...
- Sat Apr 20, 2024 6:49 pm
- Forum: Solar and Lunar Imaging
- Topic: First Time Solar Imaging.....
- Replies: 8
- Views: 655
Re: First Time Solar Imaging.....
This definitely helps when centering the Sun:
https://www.astro-physics.com/ksf6000
Instead of a conventional compass, use your smartphone's compass. I believe it will give you readings relative to true north.
Brian
https://www.astro-physics.com/ksf6000
Instead of a conventional compass, use your smartphone's compass. I believe it will give you readings relative to true north.
Brian
- Thu Apr 18, 2024 11:13 pm
- Forum: Bug Reports
- Topic: Dark frame is completely dark on SV605cc
- Replies: 12
- Views: 1527
Re: Dark frame is completely dark on SV605cc
So this means I was right? Oh, happy days!
Brian
Brian
- Tue Apr 16, 2024 10:51 am
- Forum: Bug Reports
- Topic: Dark frame is completely dark on SV605cc
- Replies: 12
- Views: 1527
Re: Dark frame is completely dark on SV605cc
Just a guess but you have Black Level set to zero. (I say a 'guess' because I am assuming that Black Level is the same thing as Offset for your camera. Different manufacturers can't agree on a common name.)
Brian
Brian
- Sat Apr 13, 2024 12:57 pm
- Forum: Solar and Lunar Imaging
- Topic: HDR imaging of eclipse
- Replies: 2
- Views: 2081
HDR imaging of eclipse
I thought you might be interested in this:
https://spaceweathergallery2.com/indiv_ ... _id=205677
Brian
https://spaceweathergallery2.com/indiv_ ... _id=205677
Brian
- Fri Apr 05, 2024 1:15 pm
- Forum: How do I?
- Topic: Beating seeing in Sharcap for an animation of the eclipse?
- Replies: 4
- Views: 406
Re: Beating seeing in Sharcap for an animation of the eclipse?
Your ability to "freeze" the atmosphere is a function of your exposure. The shorter the exposure the better. However, ultra-short exposures limit you to prominences and the chromosphere. You can employ stacking short bursts of frames every 30 seconds but this might be beyond SC's ability g...
- Wed Apr 03, 2024 10:41 pm
- Forum: Solar and Lunar Imaging
- Topic: How to Estimate a Settings Range for Eclipse
- Replies: 2
- Views: 279
Re: How to Estimate a Settings Range for Eclipse
Bill, Only use the Ha filter during partial phases. You'll have plenty of time to discover the proper exposure using the histogram. Remove the filter during Bailey's Beads and totality. Run through the following exposures: 1/1000, 1/500, 1/250, 1/125, 1/60, 1/30, 1/15, 1/8, 1/4, 1/2, 1, 2, 4, 8, 4, ...
- Tue Apr 02, 2024 2:19 pm
- Forum: Solar and Lunar Imaging
- Topic: Eclipse sequence - Dark, even, horizontal banding on the really short exposures
- Replies: 6
- Views: 427
Re: Eclipse sequence - Dark, even, horizontal banding on the really short exposures
Hi Bill, I have photographed two total eclipses: Africa in 1973 and Mexico in 1991. I used Kodachrome slide film each time, so it is a lot slower than modern CMOS cameras. In Africa I used a 60mm f/11 refractor and in Mexico a SLR with a 200mm telephoto lens at f/5.6. In both cases my bracketed expo...