SharpCap Forums

I've photographed two eclipses in my lifetime: 1973 in Africa and 1991 in Mexico. If you are in the path of totality be prepared for a stunning experience that no words can express. Place a white sheet on the ground and watch what happens at the moment of totality. I used Kodachrome slide film (a sl...

I'll hazard a guess: 1. Moisture. 2. Chromatic aberration. If possible try shooting through different colored filters to see if it mitigates the effect. I have a 400mm refractor that can't focus Blue to save its life. Ended up having to shoot with a Wratten #12 (minus Blue) for luminance. If it's #2...

Mike, Frame rate is primarily dependent on exposure, so if the exposure is 1 sec then frame rate is 1 per sec. However, 1 ms exposure doesn't yield 1000 fps! Why? It depends on the time it takes the camera to clock the pixels out of the sensor and over the wire to the laptop. That's why you will fin...

Hi Mike, The point I wanted to make is if your camera had larger pixels and the resolution without the Barlow was 1.0 arc-second per pixel, then yes definitely go with a high-quality Barlow, however, that is not the case. The other factor is your seeing conditions. If you are on a mountain top, then...

I'm not the expert on planetary but I think I'm in the ballpark with my analysis. The bottom line is that you are better off without the Barlow. For a 10" aperture (254mm) Dawes' Limit is 0.46 arc-seconds, Rayleigh Limit is 0.54 arc-seconds. So given exceptionally stable skies and perfect optic...

The Sv305 uses the tried and true IMX290 sensor. I have one but it's from Altair Astro. It is a 2 mega-pixel sensor (1920 x 1080). My Windows laptop has 4GB of RAM but I don't LiveStack. Works great. I can't say if 4GB is enough for LiveStack, so I'd recommend 8GB of RAM to be safe. However, if you ...

Hi Nick,

Great image! Very nice kit. Love the mount! You invested some serious money and it shows.

Brian

Robin, Full Well at Gain 56: 21.6ke- using High Gain Mode 40.0ke- using Extended Full Well Mode Read Noise at Gain 56: 1.7e- using High Gain Mode 7.1e- using Extended Full Well Mode I absolutely agree! That's a huge improvement. I'd even suggest using High Gain Mode with all filters, not just NB. ED...

Hi Allen,

Just curious, what scope do you have? From the numbers shown you could really benefit from a faster scope given your dark skies.

Brian

Hi, You may be confusing 'Celestial Equator' with 'Local Meridian'. Your Local Meridian divides the eastern and western halves of your sky. The dividing line is the Great Circle connecting three points: the South Celestial Pole, the Zenith, and the North Celestial Pole. The Zenith is the point in Sp...