Re: First attempt : Planetary Imaging
Hi Matt:
Great images.? I believe you're shooting with a DSLR?? It does
the inversion.? As Richard says, just like a super-telephoto.? If
you looked through your camera lens with an eyepiece the view
would be upside down.? The eyepiece leaves the the upside down
image inverted.
Rick
On 10/28/22 12:53, Matt Weeks wrote:
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I'm confused about the image orientation I've been getting for
these images, maybe one of you can point out where my
misunderstanding is, or explain what's going on.
I'm fairly certain, that when using a Schmidt Cassegrain without a
mirror/prism diagonal, the image should be inverted.? Since I have
my DSLR attached to a barlow and attached to the back of my 8SCT,
I was expecting to see an upside down image of Jupiter, meaning
with the GRS "up" in the images.?
Obviously that's not the case.? What am I missing here??
I do have the camera attached to the back of the scope in a
non-traditional way.? I've removed the barlow element from my
2inch barlow, and it screws directly to the camera (which makes it
like a 2inch eyepiece), I then use the "visual back" that is the
eyepiece holder half of the barlow screwed on to a standard SCT
T-adaptor tube to attach to the back of the scope.? It all works
fine, but shouldn't this give me an inverted field orientation??
I'm stumped.
Any insight would be appreciated.
Matt
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Re: First attempt : Planetary Imaging
Fine shot, Matt! It's nice when you can capture a moon as well!
Jim?
On Saturday, October 29, 2022 at 03:58:43 p.m. EDT, Matt Weeks <northern.stargazer@...> wrote:
Last one, I promise.? Jupiter and Callisto. 
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Re: First attempt : Planetary Imaging
Last one, I promise.? Jupiter and Callisto. 
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Re: First attempt : Planetary Imaging
Ah, interesting. So I’m guessing it’s the eyepiece that causes that last flip. Using a camera at prime focus is not the same. Thanks Richard! ?I think I get it now.?
matt
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Re: First attempt : Planetary Imaging
I use a similar setup, and it appears to me to that the telescope just acts as a SUPER telephoto lens. Both an 8”SCT and a 73mm F=430mm telescope I use give upright images.
I like your images of Jupiter and Mars, but I don’t have the stamina to stay up late enough to capture Mars yet.
Richard Taylor
I'm confused about the image orientation I've been getting for these images, maybe one of you can point out where my misunderstanding is, or explain what's going on.
I'm fairly certain, that when using a Schmidt Cassegrain without a mirror/prism diagonal, the image should be inverted.? Since I have my DSLR attached to a barlow and attached to the back of my 8SCT, I was expecting to see an upside down image of Jupiter, meaning with the GRS "up" in the images.?
Obviously that's not the case.? What am I missing here??
I do have the camera attached to the back of the scope in a non-traditional way.? I've removed the barlow element from my 2inch barlow, and it screws directly to the camera (which makes it like a 2inch eyepiece), I then use the "visual back" that is the eyepiece holder half of the barlow screwed on to a standard SCT T-adaptor tube to attach to the back of the scope.? It all works fine, but shouldn't this give me an inverted field orientation?? I'm stumped.
Any insight would be appreciated.
Matt
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Re: First attempt : Planetary Imaging
I'm confused about the image orientation I've been getting for these images, maybe one of you can point out where my misunderstanding is, or explain what's going on.
I'm fairly certain, that when using a Schmidt Cassegrain without a mirror/prism diagonal, the image should be inverted.? Since I have my DSLR attached to a barlow and attached to the back of my 8SCT, I was expecting to see an upside down image of Jupiter, meaning with the GRS "up" in the images.?
Obviously that's not the case.? What am I missing here??
I do have the camera attached to the back of the scope in a non-traditional way.? I've removed the barlow element from my 2inch barlow, and it screws directly to the camera (which makes it like a 2inch eyepiece), I then use the "visual back" that is the eyepiece holder half of the barlow screwed on to a standard SCT T-adaptor tube to attach to the back of the scope.? It all works fine, but shouldn't this give me an inverted field orientation?? I'm stumped.
Any insight would be appreciated.
Matt
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Re: First attempt : Planetary Imaging
I also tried Mars again.? I was more careful with editing, and stacked almost double the number of frames.? Nothing like the quality the masters post, but I thought it was cool to see the polar region.? And, the planet was still in the soup when I imaged it. 
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Re: First attempt : Planetary Imaging
Very nice image.? And a pretty good rednition of a fine visual view of Jupiter, except with more color saturation. Still looks pretty real to me.
[Edited Message Follows]
Here's another one from a week later.? Getting the processing to bring out detail yet still not be "over processed" is hard...I elected for detail on this one and compromised on the "feels real" aspect.? I was expecting the seeing to be better, but I think it was actually worse for this one.
Matt
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Re: First attempt : Planetary Imaging
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On Oct 27, 2022, at 3:57 PM, Matt Weeks <northern.stargazer@...> wrote:
? [Edited Message Follows]
 Here's another one from a week later.? Getting the processing to bring out detail yet still not be "over processed" is hard...I elected for detail on this one and compromised on the "feels real" aspect.? I was expecting the seeing to be better, but I think it was actually worse for this one. Matt
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Re: First attempt : Planetary Imaging
 Here's another one from a week later.? Getting the processing to bring out detail yet still not be "over processed" is hard...I elected for detail on this one and compromised on the "feels real" aspect.? I was expecting the seeing to be better, but I think it was actually worse for this one. Matt
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Saturday Sidewalk Astronomy at chapters Kanata?
The long range forecast is for clear skies saturday evening.
We'd have the 24%-illuminated moon until no later than 8pm when it drops to 5 degrees elevation.? Saturn and Jupiter will be up at sunset. But Jupiter wont clear the walmart until about 6:40. So I'd suggest a 6:30pm start.
Personally, i'm still watching the ottawa covid wastewater levels.?
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Re: First attempt : Planetary Imaging
my advice is that if you really like doing planetary imaging, ditch the dslr (even though its great to use what you have) and get a used simple dedicated planetary cam
That's good advice Mike. I'll keep my eyes open for a good deal. That being said, I'm still primarily a visual observer, this imaging stuff is just a side experiment/light polluted backyard activity.........for now.
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Re: First attempt : Planetary Imaging
Matt, my advice is that if you really like doing planetary imaging, ditch the dslr (even though its great to use what you have) and get a used simple dedicated planetary cam like the ASI 120mm or even a colour one. If you already have a laptop its a no brainer. The capture and stacking software are free (firecapture and autostakkert3)
just my 2 cents
Mike
Processing artifact?
yes, I see what you mean. And yes I suspect that effect is a result of the processing. I’ll keep an eye out for it on the other stacks I’ve yet to processes. Maybe a lighter touch is needed.?
matt.?
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Re: First attempt : Planetary Imaging
Processing artifact?
yes, I see what you mean. And yes I suspect that effect is a result of the processing. I’ll keep an eye out for it on the other stacks I’ve yet to processes. Maybe a lighter touch is needed.?
matt.?
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Re: First attempt : Planetary Imaging
When you say it looks gibbeous, are you referring tot he limb darkening in the image? Yes. The left limb looks like it's limb-darked. The right hedge has a bright white edge. Processing artifact? attilla danko, , danko@..., attilladanko@... On Thu, Oct 20, 2022 at 9:43 PM Matt Weeks <northern.stargazer@...> wrote:
I had the camera installed straight through, no mirror or prism diagonal, so I think this image is upside down. South on top, west to the left. I suppose I should either mark my images, or orient them south down, like most people expect. This is starting to be feel like work! haha.
When you say it looks gibbeous, are you referring tot he limb darkening in the image?
Matt
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Re: First attempt : Planetary Imaging
Thanks Mike, I honestly didn't have high expectations trying this out.? Like I said above, I stumbled upon the fact that I had everything I needed to give it the 'ol college try.? I expected dismal failure.? But, the results have well exceeded my (admittedly low) expectations.? Enough so, that I might keep at it for a bit as a backyard activity.? I find myself wondering how much better things would look with better seeing, or with a more powerful barlow (using a 1.6x at the moment).
I think I might give the moon a shot too.? I recall you were doing a bunch of lunar imaging years ago, is that something you still do?
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Re: First attempt : Planetary Imaging
I had the camera installed straight through, no mirror or prism diagonal, so I think this image is upside down. South on top, west to the left. I suppose I should either mark my images, or orient them south down, like most people expect. This is starting to be feel like work!? haha.?
When you say it looks gibbeous, are you referring tot he limb darkening in the image??
Matt
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Re: First attempt : Planetary Imaging
Very nice detail. Hits of festoons in the upper (presumably northern
equatorial band).
Interesting that jupiter looks gibbeous in your image, even though
were less than a month since Jupiter's last opposition.
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On Thu, Oct 20, 2022 at 8:19 PM Matt Weeks <northern.stargazer@...> wrote:
Tried some different techniques on this one, a little later in the night and maybe the seeing had improved, so I was able to eek out a bit more fine detail.
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Re: First attempt : Planetary Imaging
Looks great!! Honestly its really hard to do planetary imaging with a DSLR! Processing is spot on to my eye!
cheers
Mike
Tried some different techniques on this one, a little later in the night and maybe the seeing had improved, so I was able to eek out a bit more fine detail.
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Re: First attempt : Planetary Imaging
Tried some different techniques on this one, a little later in the night and maybe the seeing had improved, so I was able to eek out a bit more fine detail. 
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Richard Harding