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Rusted

Where's my Saturn? I want it and I want it now! ;-)

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Hi there, :smile:

Should I be able to see Saturn on my laptop or computer monitor when I'm using a 7" f/12 refractor with a ZWO120MC USB3 and SharpCap? No filters.

I centred visually with the drives tracking so Saturn was absolutely central and the camera sharply focused on the nearby Moon just moments before.
Visually, Saturn looked bright despite its despicably low altitude. Full gain & longest exposure in SharpCap. I was fully expecting to see stars but didn't! Nowt!

Still no Saturn! :crybaby2:

I have really no idea what to expect from the ZWO at lower light levels. :blush:

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I have found it very tricky to get planets in the camera FOV, I think that's why they invented flip mirrors :D I sometimes remove the camera and squint up the scope to make sure I can see the planet but it still needs a bit of nudging to get it on the camera.

I'm using 10"SCT F/l 2500

It helps to have a finder with four illuminated crosshairs so you get a little square in the middle but it needs to be very accurately aligned with the main scope / camera.

I use Firecapture that has separate profiles for different Solar System objects with different exposure times, it needs the latest ZWO SDK to work.

Dave

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Something else I've resorted to, if you're guiding, is to centre a bright star on the imaging camera using onscreen crosshairs then mark it's position on the PHD screen, slew to Saturn and use the PHD screen to get it aligned.

Dave 

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Thanks Dave.

My original post was really questioning the sensitivity of the ZWO.
I removed the camera and checked that Saturn was lighting up the field of view.
I refitted an eyepiece and made Saturn absolutely central.
I gave the focuser a gentle push in all directions but still nothing showed on the screens.
I used the ultra slow AWR drives to wander around the immediate area.
The camera was perfectly focused on the Moon and hard up against the eyepiece socket stop.
With a 2160mm focal length it should have been clearly visible in size.
I engaged LX in SharpCap and found several bright blue pixels and eventually a completely spotty screen.
The spots weren't stars. They were fixed and only moved with the camera. Not with the telescope. Presumably just noise?
It was completely baffling at the time. I had captured videos of Jupiter at a similar low altitude not long ago.
Jupiter wasn't bright but it was clearly visible on the screens. Saturn should have been similar.
The Goto slew from the nearby Moon had placed Saturn dead central in the eyepiece. Just for a change. :rolleyes:
After messing about for half an hour I imagined it must be operator error.
Or I had cooked the ZWO on the sun. :blush:
That couldn't have been true because I had no problem capturing the low, half Moon just before.

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You say you had it set it to longest exposure in sharpcap, isnt that 1000 seconds?! 

You should 100% be able to get a nice bright preview on Saturn on the screen, so something definitely amiss with either the exposure settings,  or the planet wasnt on the chip??

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Thanks but I was certain I had the planet central on the camera.

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