Space Cowboy

Super images Geof! Must confess i prefer the smoother version which gives it an almost dare I say it Damian Peach feel 🙂

32" monitors are not very forgiving when it comes to noise 🙂

Lots of detail on that one for sure!

Nice level of detail Lee.

Nice detail showing. Looks like Mars is thinning on top?

Very interesting read.

The conditions in Australia might be more suited to slower shutter speeds 🙂 Certainly worth noting how noise can effect stacking alignment though. I do remember getting better results with my old DFK at 30fps compared to 60 because of the noise issue.  I might try slowing down shutter speed and using less gain but when the sky is like a foaming ocean its a pig,

That's a beauty!

Seeing conditions are the key. Considering the conditions were less than great the oversampling has done ok.

3 hours ago, vlaiv said:

Here is an interesting thing:

these are both F/14 versions - but one on the left is sharper than one on the right - because I just ran a bit of sharpening on it.

Compared to resized oversampled image - it now looks sharper, doesn't it:

(left sharpened F/14 image and right downsampled over sampled image).

I guess there is a lot to how the image was processed.

One thing is sure - over sampling won't make image (at focal plane) sharper as laws of physics don't allow for that - any perceived sharpness is due to difference in processing - and as we have just seen, simple tweak can make properly sampled image look sharper.

The processing depends on the individual's preferences regarding the finished result. Neil doesn't like to over-sharpen his images, so the comparison is based on his preference, i.e., a natural appearance. I'm sure I could add extra sharpening to the oversampled image to reverse the difference again. What we produce in theory and practise are not always the same. Some conditions and setups will favour one sampling over the other. Experimentation is how we find our own sweet spots 🙂

18 minutes ago, vlaiv said:

Really? I'm not seeing it

Here is comparison at ~F/14 scale

and here is comparison at ~F/26 scale

In both cases - ~F/14 is on the right side.

And to tell you the truth - I'm finding ~ F/14 to be maybe just a tiny bit sharper on some features while F/26 might be said to be sharper on other

Here we see that F/14 is sharper / has better separated and more contrast on the feature that I marked.

~F/26 looks just a tiny bit sharper in this feature.

To my eyes the oversampled shot looks far sharper on the f14 size comparison.

3 hours ago, neil phillips said:

Having to snatch chances lately. Nearly didn't get anything.  It's good to be imaging Mars again

Looking at these again on my 32" monitor and the oversampled image is much sharper, showing finer detail. If you shrink it down 50% it kills the f14 shot for sharpness. I've always thought you can get a more accurate focus with a larger image, even if it looks a bit noisy. I remember years ago using my 5x powermate with the qhy5L-ll on Mars at nearly f25 and although the images initially looked noisier the detail was far sharper.

The polar cap detail on these are awesome Neil, with such a 3D effect.

Those look good on my phone. Look forward to seeing them on my pc later! 

48 minutes ago, Kon said:

Thanks. I was surprised how stable the seeing was. I had to reject a lot of frames in Autostakert.

It's getting bigger and easier to process.

Yes breezy conditions can offer decent seeing. I assume you're using a motorized focuser? 

Very nice detail on those.

Great result for the conditions! 

Windy conditions with manual tracking and he still gets detail on the polar cap! Great work again Kon!

17 hours ago, neil phillips said:

Yes Stuart July 22nd. God knows what gods aligned to allow the weather to calm like that. I know come July. I will be looking for seasonal patterns. There must be a seasonal element to this somewhere ?

The best seeing conditions I ever experienced were just after dusk in June. That was Saturn too at low elevation. Obviously the jet stream is less active during summer months. Maybe the drier atmosphere also helps atmospheric dispersion? 

Crazy good! I'm assuming this was during the summer? If only Jupiter was at opposition then. 

What this image proves is that anything is possible in excellent seeing. 

Just be careful when using wavelets before derotation not to introduce any artifacts. Sharpening the detail will help winjupos with its derotation process as against the unsharpened image. 

Don't know how I missed this one. Super image Kon! Lots of detail!

Brilliant first images! Way better than my first planetary shots. Considering the limitations of your gear you are clearly a natural at this game! 

Lots of detail there Harvey!

That's a super image Lee. Lots of detail in the GRS!

4 hours ago, Magnum said:

I guessed it was the 2nd image from the larger scale, to my eye the top image looks sharper

I briefly had an ADC in September to use on my 12" SCT but after waisting several nights with it I found that all the captures with the ADC were lacking detail compared to without it, I was 95% sure I had it adjusted correctly as the captures with it showed less colour fringing, but also much less detail, so I concluded that I either had a duff one or the brand I bought was just crap but was able to return it. I don't have much patience with things like this and not enough clear nights to experiment

 I also tried on Saturn where it did remove the colour fringing, but I feel Saturn is too low for sharp visible light images at the moment anyway so prefer to just image low planets in IR

Ive been getting what I think are very detailed Jupiter images without it so am in no rush to get another one.

Lee

I see where you're coming from Lee. I felt the same about the ADC. I've had mine several years and only used it a handful of times. Always been sceptical of its merits as I too hate "faff". I have to say this nights results have won me over. I should have mentioned (thought I had) that the ADC image was taken in poorer conditions. Basically I didn't trust the ADC so got some decent captures on the board before trying it when seeing had dropped off. Even though trans was poorer and gain was pushed very high the noisier live image looked sharper on screen after adjusting the ADC. This is the ZWO version btw.

As you know it's impossible to make a direct comparison as there are so many variables with seeing being the most obvious but my gut feeling even though I was sceptical is that it did sharpen the images on this occasion.

I need to post up the last image taken before I swapped to the ADC as the one here is one hour earlier when both seeing and altitude were superior (only 2 degrees mind).

Lots of detail on those Geof though a little dark on my screen?

Edit : Its my monitor, sorry Geof, my missus turned down the brightness.