SharpCap Forums

Excellent, Dave!

I really like M13 with NGC 6207, the spiral galaxy in the corner.
It's a challenge working with the light pollution filters.

Brian

Mark, You can check out my site here: https://snrcalc.now.sh/ The code is open source and available at GitHub (scroll down to the footer for a link). You can create a spreadsheet if you want from the formulae in calculation.service in the core/services folder. It takes minutes to read the general in...

Hi ippiu,

My mount is not capable of dithering. To solve the "raining noise" problem I increase exposure. Works every time.

Brian

Oooo nice, Minos!

Joe mentioned HyperStar. Doesn't that put the camera in front? According to Celestron the Evolution 8, out of the box, has an aperture of 203.2mm and focal length of 2032mm. Starizona's website says that HyperStar will convert it to f/2 which will put the effective focal length at 406.4mm. The ASI29...

Do we know what Joe's field of view will be?

AussieHowie, Thank you for suggesting Yellow #12. Yellow crossed my mind yesterday but there will still be a problem with accurately capturing the brightness of hot blue stars since it falls outside of the Yellow bandpass. The lesson is "buy a true APO". I might also give a reflector a try...

As promised, here are the results of LRGB vs GRGB: LRGB vs GRGB.png At first glance they look quite similar. The diameter of the GRGB stars are a bit smaller which I see as a plus. The problem is with the red star in the middle. It has become paler and even smaller in size. Why is this? Stars do not...

All right, I had a challenging session last night (98% Moon and high clouds) but managed to get in one hour of data. I chose a loose cluster of stars in Canes Venatici. Red stars and Sun-like stars, unfortunately no blue stars. I set out to test the possibility of replacing the luminance filter with...

Hi Minos, I see your point about the Green filter not picking up Ha regions in galaxies. Certainly the Red filter will pick it up but only having bin2 detail. I think that GRGB will work fine for star clusters where the stars themselves are the focus of attention. For all other targets then LRGB is ...