SharpCap Forums

Hi Menno, Good, but are both approaches equally valid in your situation? I understand what he is saying, but he is assuming that you have very dark skies. This is why raising gain works when capturing narrowband. The narrowband filter almost cuts your LP to zero. Unfortunately you don't have that sa...

Menno, This is how I see the problem: IFN formula.jpg At cell B1, I am giving you the benefit of the doubt that your Bortle class is halfway between Bortle 7 and 6. At cell B2, I am giving us the benefit of the doubt that the IFN's surface brightness is 25 mags per square-arcsec. At cell B4, we use ...

Menno,

I think I am going to go for this:

Brian

Menno, Ah yes, I see the IFN is much brighter up there. Maybe I'll give that a try. The trick is to find a FOV that has a filament structure with light and dark areas. If you choose a region that is just solid nebula, then you won't be able to distinguish LP from the IFN. The author of that image at...

Nick, I had version 1.8.5. I just installed 1.9.2. Now I see the Astrophotography Persona. I'll give it a try. Just looking at the panels, it looks as if it supports OSC, but I wonder about LRGB? Complicating matters, now I do W12RG instead of LRGB. However, I have plenty of old LRGB sessions that I...

Hi Nick, Affinity Photo is an incredible bargain at $25 (last I checked). So far, I've just used it for standard post-processing tasks. I need to update to the latest version that came out a few weeks ago. My version doesn't have an Astrophotography Persona, at least not to my knowledge. Thanks, Brian

Hi Menno, In this photo of M81/M82/IFN, I indicated the position of HIP 46977. Is the dense part of the IFN above the top boundary of the image? I was planning on the area within the red rectangle. A few days ago I searched the InnerWeb for discussions of the IFN, and particularly surface brightness...

Hi Tim, I have only anecdotal evidence to support the assertion that no matter the aperture, one can only expect to do no better than what the current seeing conditions allow. One exception is lunar and planetary imaging. My yearning for more aperture stems from a desire to capture more photons per ...

This came out better than expected. M51-combine-sessions_2021-03-21_oopfan.jpg Technicals: William Optics 71mm f/5.9 Atik 314E Session 1: Wratten #12: 83x60s bin1 Red: 48x60s bin1 Green: 20x60s bin1 Integration Time: 151 minutes Total SNR: 6.64 Session 2: Wratten #12: 26x150s bin1 Red: 6x300s bin1 G...

Here is a good example of how atmospheric turbulence can affect LRGB astrophotography. In the first image, the atmosphere was steady from beginning to end. In the second image, the atmosphere was turbulent in the beginning, but quickly steadied. The first filter I use is Red, so it was most affected...