By the way, here is a raw frame from the Empire State Building video. No adjustment other than lowering the resolution for posting. It gives you a feel for what is due to instrument scatter versus sky background and corona. Dim grey area over the Empire State Building: this is due to scatter in the ...

Thank you all for the awesome response! And very useful because I was not necessarily expecting this result. I think aesthetically, people are preferring the cleaner images of #2 and #4. So for presentation, I should be careful to keep it clean. As Rainer said, I was focused on what is the max you c...

Another shot at processing, from 15 minutes before first contact to one minute after. I used curves to try to highlight the Moon coming in better. You should be able to see the Moon in all seven images. You will probably need to click on the thumbnail to see it better.

George

I am looking for opinions on processing. Of these versions of the same coronal image from 2023-09-16, it would be helpful to hear which processing people like best. I have been working on how to fit the wide dynamic range into what is visible on the screen. I've been trying brightness-contrast, Phot...

So happy to see this. Thanks.

George

Here is a shot with better processing, and it shows where on the Empire State Building the camera was pointing.

George

Thanks, Alexandra! Let me admit that much of the grey light is light scattered in the atmosphere, mixed in with actual corona. The streamers are the part that are clearly only corona.

George

Yesterday was a relatively clear day, and the Sun was at about the right height, so I lugged my coronagraph and mount and camera on the subway to West 34th St and 12th Avenue (the Hudson River) to image the solar corona behind the Empire State Building. Here is my first attempt at processing. I hope...

I processed my last image before second contact. I was busy looking at the Sun during annularity, and then some light cirrus moved in. Not enough to notice in white light but bad for coronal viewing. With the Sun 90% covered, most of the scattered light should be gone, so this should be a great imag...

Thanks again. The mount is a new ZWO AM5 harmonic drive unit that I like a lot, on a TC40 pier with PE160 pier extension. The 50mm is f/20 for 1000mm, the white dew shield helps avoid dust (maybe 300mm), and then the chronograph is a series of lenses that adds another 400mm. So about 1700mm total. T...

Here the coronagraph is set up at Comb Ridge in southeast Utah, USA. Other than the battery, that all came with me from New York.

George

Thanks, and thank you for the SPOD.

FYI, here is a closeup of the 15:08.

George

Maybe this one is more clear.

George

Maybe this one is more clear.

George

This is taken from Comb Ridge in SE Utah in my 50mm homemade coronagraph at 5303 Angstroms during the annular eclipse. Universal times label the images, and they all have south up. The dark black disk in the center is the shadow of the coronagraph’s obscuring cone. The Moon is a more subtle grey dis...

This is taken from Comb Ridge in SE Utah in my 50mm homemade coronagraph at 5303 Angstroms during the annular eclipse. Universal times label the images, and they all have south up. The dark black disk in the center is the shadow of the coronagraph’s obscuring cone. The Moon is a more subtle grey dis...

Better resolution. George

Yesterday I went to Pikes Peak CO, with my coronagraph at the end of my eclipse trip. It is over 14,000 feet or 4300 meters. My planned day was met with snow, so I delayed my flight a few hours and got there before I had to head to the airport on my last day. It was a pretty cloudless day, but not s...

It would have been visible to the eye before first contact, but only as it got closer. That active region was visible before I attached the camera, so I would have seen it. The problem was that I had to choose between imaging and visual. It only takes a minute or two to switch, but that's long enoug...

Thanks, all. Yes, I was hoping to get this shot. I have a series of images and hope to show the early progression. There was a haze, and I could not get negative shots to subtract, so it is limited how faint I can go on the corona.

George

You may have to shift the image to the left to see the Moon on the right. Not sure why it didn't resize it. George

I went out to Utah to get the Moon in front of the corona, and here is an early shot. I have a lot of processing to do and to create a montage of the Moon approaching the Sun. But here is one shot with minimal processing with the Moon’s shadow coming in from the right before first contact. Just happ...

Thanks, all. James, yes, that is 5303A for Fe XIV. The FWHM is about 1.2A by using two 2A filters. It is slightly tunable in the sense that if I drop the temperature by over 12C, it goes off band. 20C is pretty much completely off band. At 12C it is far enough to use as a negative image. On the skie...

i went to Utsayantha Mountain on Oct 1 and was shooting the corona. In between my on-band shot and my off-band shot, an insect laid a gossamer thread across the dew shield in front of the objective. It was too thin to see normally, but it glinted for a moment when I was taking down the scope at the ...

Eric, yes. JB Weld is very strong and tolerates very high temperatures. The main challenge is that it can pull the coating off the glass. If that happens, just reglue it, and then the glass will break before the screw releases. So far it has only happened on cheap lenses with presumably cheap coatin...