Search found 1777 matches
- Sun May 12, 2024 5:59 pm
- Forum: Gallery
- Topic: NGC 3372, Ha/OIII 4-panel mosaic, Argentina/UK collaboration
- Replies: 7
- Views: 374
Re: NGC 3372, Ha/OIII 4-panel mosaic, Argentina/UK collaboration
Thanks Menno. This is scaled down to 33% of original size and saved as a JPG with quality 78% to get under the forum 1Mb limit. HOO2_combine-crop-lpc-cbg-St-scaled .jpg The 4-panel mosaic is 9341x5770. The FITS out of Astro Pixel Processor is 616Mb. Saved as a PNG is 88Mb. Saved as a JPG with 90% qu...
- Sun May 12, 2024 3:14 pm
- Forum: Gallery
- Topic: NGC 3372, Ha/OIII 4-panel mosaic, Argentina/UK collaboration
- Replies: 7
- Views: 374
Re: NGC 3372, Ha/OIII 4-panel mosaic, Argentina/UK collaboration
Thanks Tim.
Dave & Leandro
Dave & Leandro
- Sat May 11, 2024 5:23 pm
- Forum: Gallery
- Topic: NGC 3372, Ha/OIII 4-panel mosaic, Argentina/UK collaboration
- Replies: 7
- Views: 374
Re: NGC 3372, Ha/OIII 4-panel mosaic, Argentina/UK collaboration
Results of some experimentation to obtain stronger colours. Using GIMP's Hue-Saturation with Saturation = 20 and applied twice: NGC3372_HOO-2-saturated2.JPG GIMP-Saturation.JPG Using PixInsight Processes StarMask and CurvesTransformation: NGC3372_HOO-2-starmask.jpg The original image: NGC3372_HOO-2....
- Wed May 08, 2024 6:09 pm
- Forum: Deep Sky Imaging
- Topic: Exposure Starting Point
- Replies: 14
- Views: 565
Re: Exposure Starting Point
Jerry With my refractor, I have found 60x60s to be a decent compromise for objects such as M42, M31, M51, M101, M81/M82, M27 (wide field); 60x15s to be useful for globular clusters. My C8 SCT I use for lunar/planetary. You will soon build up some knowledge after a few trials. If you have a cooled ca...
- Wed May 08, 2024 7:14 am
- Forum: Deep Sky Imaging
- Topic: Exposure Starting Point
- Replies: 14
- Views: 565
Re: Exposure Starting Point
Jerry Having slept on last night's post, the histograms also give other information. Looking at the 120s exposure, the histogram tells me that for M42 with my equipment and sky conditions (Bortle 6) I will not gain anything by increasing the exposure. Increasing the number of frames will help (up to...
- Tue May 07, 2024 7:15 pm
- Forum: Deep Sky Imaging
- Topic: Exposure Starting Point
- Replies: 14
- Views: 565
Re: Exposure Starting Point
Jerry Don't overlook the simplicity of test shots and a correctly shaped histogram - to assess the exposure for an object under given sky conditions. These log histograms displayed in FITS Liberator are test shots of M42. Aim for A to be greater than zero and B to be less than 65535. If A is zero, t...
- Tue May 07, 2024 12:09 pm
- Forum: Gallery
- Topic: NGC 3372, Ha/OIII 4-panel mosaic, Argentina/UK collaboration
- Replies: 7
- Views: 374
Re: NGC 3372, Ha/OIII 4-panel mosaic, Argentina/UK collaboration
Thanks Brian.
Dave & Leandro
Dave & Leandro
- Tue May 07, 2024 11:56 am
- Forum: Gallery
- Topic: NGC 3372, Ha/OIII 4-panel mosaic, Argentina/UK collaboration
- Replies: 7
- Views: 374
NGC 3372, Ha/OIII 4-panel mosaic, Argentina/UK collaboration
Many thanks to Leandro for capturing the data and producing the Ha and OIII stacks. The images are a 4-panel Ha/OIII mosaic of NGC 3372 (part of the Carina Nebula). Leandro (@leandro from Argentina) captured the data during March/April 2024, over 16 nights to avoid the moon and bad weather. Leandro ...
- Sat May 04, 2024 1:32 pm
- Forum: Gallery
- Topic: M42 chronicles
- Replies: 50
- Views: 28050
Re: M42 chronicles
Tim
Yes with evolving software and my improved processing, I have been able to achieve better results from older data. Always worth revisiting old stuff.
Dave
Yes with evolving software and my improved processing, I have been able to achieve better results from older data. Always worth revisiting old stuff.
Dave
- Wed May 01, 2024 8:22 am
- Forum: Other Cameras
- Topic: SVBony SV305 (Older Non Pro) not natively detected
- Replies: 12
- Views: 518
Re: SVBony SV305 (Older Non Pro) not natively detected
Phil
Dave
This is worth trying. I have an old ZWO ASI120MC USB2 camera which does not work when connected to a USB3 port but functions correctly when connected via a USB2 port.I could try a USB2 hub to see if that works I guess
Dave