Wednesday, March 13, 2019

Spring 2019 - a break in the clouds

Finally, there's been a break in this rainy season.  California has had a lot of extra precipitation this year and that's a great thing.  However, the continuous cloud cover has put a damper on any astro activity.

It's been clear since Monday night and I've had the chance to finally set up the scope in the back yard for a little bit of fiddling.


As usual, I'm using VNC to connect to the shed, allowing a monitor of progress.


This is the QSI 583 with the Pentax 67 200mm lens.

I've been looking at the logs from the past night and notice something interesting:

The FWHM of the stars really shows a lot of bloat when using the light pollution filter (seen here as LP).  I have a hunch that if I want to use this setup in suburban skies, only RGB filters should be used and save Luminance for when out of town. 

Note the focus positions for each filter:


What's new is that I added a red-dot sight to the body of the camera, making it easier to start the night's imaging.  Also, I added a proper dew strap.

I've also added the QHY Polemaster to my collection.  I'm surprised at how easy it is to use and think of the lost dark skies at GSSP and Calstar where I've spent hours doing drift alignment.




Sunday, September 2, 2018

Looking ahead to Calstar 2018

Weather appears to be pretty good!

Not as hot as expected, should be really pleasant.


Thursday, August 30, 2018

Lynds' Dark Nebula 673

Lynds' Dark Nebula Catalog Numbe 673 in Aquila

Stellarvue SV4 Apo telescope at 653 mm F 6.3
QSI 683 with Astrodon filters

Blue x 19 @ 900 seconds
Green x 17 @ 900 seconds
Red x 18 @ 900 seconds
Lum x 26 @ 900 seconds

Taken during the Golden State Star Party in June 2017 & July 2018




Been a long time getting around to finishing these pictures.  I know that the color is a bit over saturated.  It's color balanced on the dark lanes of the dust clouds. 

This has turned out to be an interesting experiment in processing to show the absence of light.  Because the object of interest is so dark, I found that getting extra data was required, especially under very dark skies.  Thus, I found that I had to concentrate on this target only at GSSP.

Happy to finally be finished with this target, I'm ready to move on.

Thursday, August 9, 2018

Focus Confirmation

Checked and Double Checked


As mentioned in an earlier post, I've been working through the steps to properly measure infinity focus with the Pentax 67 400 mm EDIF lens.

I've been able to properly measure and confirm that the lens will reach infinity focus and that the Stiletto device is properly calibrated.