Astrozoid

Hmmm. No. A Dob is an altazimuth mount. It has no polar axis, so it can not be polar aligned. If you put the Dob on a poncet platform, then you can polar align it. Hmm. No. You need to pick up a ...

Yes, and you still have to align it every time you use it unless you are just lazy and sloppy. :-) No idea. Depends. Some do, some don't. It's not hard to do it yourself. No. GoTo dobs might need ...

Entire books have been written on this subject. Probably making it more complicated than it needs to be, but those books are for collimation when you are constructing a scope from scratch. It's not ...

Ok, now working in Adobe color space... PS 19.1.5, ACR 10.4 V3 Process -40 Blacks in ACR 50,30,7 curves black points black border now reads 1,1,1 8th square now reads 8,7,14 and the blue is back. Jerry

Hi Bmike, Ok, I found it down at the bottom. Thanks! Jerry

Hi Mark, Additional test in PS 19.1.5 and ACR 10.4... Everything the same Null Profile, V3 (2012) process. BUT, no -40 blacks in ACR... Then I can adjust the black points in a curves layer in ...

Hi Mark, Note PS and ACR versions... Photoshop 19.1.5 ACR 10.4 Adobe is not available as a color space for the DNG file. Only "Null Profile" is now available for these DNG files. Opening a regular ...

Mark, Is this image corrected for the blue? It looks pretty good to me. Jerry

Hi Mark, That is some impressive detective work! Jerry

Hi Roger, I look forward to your results from that test. Jerry

Hey, I used to live in New Orleans, I know about the gulf coast weather... :-) But you should get some nights of great seeing because of the proximity to the gulf. The body of water should ...

It's the same where I live. You just have to wait for those one or two nights per year when the seeing is mediocre instead of terrible. Jerry

Since we are at the height of planetary season right now, I thought I would put together an article on the basics of high-resolution lucky planetary imaging for those who want to try their hand at ...

This area of Southern Orion contains large complexes of not only bright red emission nebulae, but also much fainter blue reflection nebulae. http://www.astropix.com/Southern_Orion.html Click on the ...

Hmmm, yea, it's a lot more complicated than that. If you want to shoot prominences, you will need a special hydrogen-alpha with a narrowband filter. If you want to just shoot sunspots, you can use ...

I think Sequator is made for deep-sky / panorama images where you have a lot of stars. Since you only have a single planet and 2 stars, you might want to try a planetary stacking program like ...

Thanks to everyone who took a look! Jerry

Thanks. Low ISO does not help with noise. It gives you more dynamic range. It is a widely held misconception that high ISO equals more noise.  It doesn't. Cutting the exposure in half every time ...

Here is a single frame of M20... http://www.astropix.com/M20.html Taken with a Nikon D5300. Jerry

I've got some articles for beginner's here: http://www.astropix.com/html/i_astrop/toc_ap.html Jerry