Lyle Aldridge

We can't tell with certainty, because you haven't given all the details, but I suspect the problem came mostly from trying to use auto-exposure. The 600mm image is mostly just over-exposed. ...

Wow, five days is a long time to go without input in this very friendly and helpful forum. I don't have experience with either of the optics you're considering, but maybe my thoughts will get you ...

I guess I stand corrected. I have two Cassegrain scopes myself, including a C90 Mak, and have never noticed that. I've noticed a larger FOV, but assumed that the images within it were still the ...

Without seeing yours, I can't say for certain, but most two-tube camera adapters use the longer tube for "eyepiece projection." Using that tube alone doesn't increase the focal length or ...

I'm sure this is old news to many, but for the benefit of others who might have tried and discarded GIMP in years gone by, version 2.10 is vastly improved over 2.8. Prior versions were limited to ...

* * * I'm sorry to say, Anthony, but I think your question really ends at the first set of asterisks. There may be few tasks that are truly impossible, but what you're describing is something you ...

The color differences are real, but subtle. There has been a trend in recent years to exaggerate them to create what are known as "mineral moon" images. You can read a summary of the process here: ...

I don't see mention of dark frames in your posts so far. Are you adding any darks to the raw files you're running through your stacking program? Or using whatever feature your camera may have for ...

I lack personal experience with either device you're considering, but there is a thorough review of the Star Adventurer on Phil Hart's blog here , and of the Star Watcher Mini here . The Star ...

You don't need a view of Polaris to do polar alignment. At the level of magnification you're using, drift alignment should be fairly easy, just using the grid on your LCD. At its most basic level, ...

If you're just beginning to see an image with the tube all the way forward, that means your camera is a too far away from the focal point of the objective. You need to remove the star diagonal, ...

Trollmannx and I concur on the guiding issues. Assuming that your guiding program supports your mount, all that matters is that the polar axis of the mount is or can be aligned with the rotational ...

You're very welcome. Let's hope that son of yours gets the bug. In my opinion, Celestron should never have packaged a 900mm F.L. telescope with an RDF, or with a 20mm as its "low power" eyepiece. I ...

Yep, that's what he means. Note that he's using a Software Bisque Paramount MyT, a "legendary" drool-worthy premium mount, seen here . Nevertheless, it still took patience and skill for Mark to get ...

That is a nice, clean image. Can you be a little more specific, though, about what you mean by "no process"?

That's a nice result. It looks like you benefited from the good seeing that so often come with misty skies. The details are cleaner than I've seen from many using larger optics and greater ...

I spent a few days in Arlington this month, so I know that your light pollution is horrible, but Mars was clearly visible to the naked eye. So you should be able to find it with even a modest ...

It certainly wouldn't be to me, but value, by definition, is what a buyer under no duress or compulsion to buy is willing to pay to a similarly situated seller of the goods or services in ...

David, I might be misinterpreting the Sharpcap documentation,but I think the control of color balance in Sharpcap depends on the driver for your particular camera. That is, if the driver for your ...

Until seeing Jack's post, it didn't occur to me that the GFX was medium-format. I doubt your 8-inch SCT is capable of delivering that large an image circle. But I still think the vignetting might ...