How to Attach a 2″ Filter to Your NexStar SCT

I'm switching from using a 1.25 inch LPR (Light Pollution Reduction) filter to a 2 inch filter because I believe it will make my equipment more secure when it comes to mounting my DSLR (with T-Ring) and CCD cameras onto my Schmidt–Cassegrain telescope. I may also get a 2" CLS filter in the near future, just to compare it to my LPR. The astrophotography equipment used in the video are listed below: Optolong L-Pro Filter – 2" Mounted
2" – T2 Adapter Thread Outside
2" SCT adapter I used the NexStar 8SE telescope in this demonstration, but this system should work with any of the following Celestron telescopes: C5, C6, C8, C9¼ and C11 telescopes. When using a f/6.3 focal reducer, the reducer would go on first followed by the 2 inch filter. Chuck’s Astrophotography For people interested in Astronomy and Astrophotography.

MaxIm DL Part 4: Using Captured Data – OPT

Опубликовано: 1 мар. 2017 г.

Visit for all of your astronomy product and knowledge needs.

OPT’s Chris Hendren shows you how to get the most out of your astrophotography using MaxIm DL.

In this fourth video in the series, Chris shows you how to use your previously captured data to calibrate your images.

00:10 Intro
00:15 CCD Dark Frame
00:41 Part 4 Overview
00:49 Quick Calibration
01:11 Flat Frames
02:16 Hot Pixels
02:46 Color Frames
03:16 Set Calibration
04:31 Align and Stack
06:47 Median
07:29 Combine Color
08:23 Screen Stretch Histogram
08:56 Saving Processed Images
09:21 Outro

Other videos:

*MaxIm DL Tutorials:…
*Image Processing video playlist:…


10 Sleepless Nights by Olivaw
Creative Commons — Attribution 3.0 Unported— CC BY 3.0…
Music provided by Audio Library

Edited for length, volume, and EQ

Atlas V Launch with classified Reconnaissance Satellite March 1, 2017

A United Launch Alliance Atlas V rocket is set for a U.S. West Coast launch on Wednesday lifting into orbit a clandestine payload for the National Reconnaissance Office.

Secret Mission with the delivery US Navy satellites.

Atlas V, flying in its basic 401 configuration, is set for liftoff from Space Launch Complex 3E at Vandenberg Air Force Base at 17:50 UTC.

NASA Television provides live coverage of launches

Managers cleared Atlas V to head into final launch preparations on Monday in a clean Launch Readiness Review and meteorologists have issued a 90% chance of favorable conditions during the day’s classified launch window that closes no later than 18:30 UTC.

Atlas V NROL-79 Mission Profile

Following up on Wednesday’s mission will be a Delta IV launch on March 8 from Cape Canaveral lifting the ninth satellite for the U.S. Military’s Wideband Global Satcom communications constellation and a March 19 launch of Atlas V will loft the Cygnus OA-7 mission to resupply the International Space Station.

Recorded launch

The effects of one Martian day of wind blowing sand

PIA21143: Sand Moving Under Curiosity, One Day to Next

 Target Name:  Mars
 Is a satellite of:  Sol (our sun)
 Mission:  Mars Science Laboratory (MSL)
 Spacecraft:  Curiosity
 Instrument:  MARDI
 Product Size:  2108 x 1533 pixels (w x h)
 Produced By:  Malin Space Science Systems
 Full-Res TIFF:  PIA21143.tif (7.113 MB)
 Full-Res JPEG:  PIA21143.jpg (214.8 kB)


he pair of images in this animation shows effects of one Martian day of wind blowing sand underneath NASA’s Curiosity Mars rover on a non-driving day for the rover. Each image was taken just after sundown by the rover’s downward-looking Mars Descent Imager (MARDI). The area of ground shown in the images spans about 3 feet (about 1 meter) left-to-right.

The first image was taken on Jan. 23, 2017, during the 1,587th Martian day, or sol, of Curiosity’s work on Mars. Figure 1 above is the image with a scale bar in centimeters. The second was taken on Jan. 24, 2017 (Sol 1588). The day-apart images by MARDI were taken as a part of investigation of wind’s effects during Martian summer, the windiest time of year in Gale Crater.

When Curiosity landed inside Gale Crater in August 2012, MARDI recorded the descent from the rover’s point of view. Malin Space Science Systems, San Diego, built and operates MARDI.

NASA’s Jet Propulsion Laboratory, a division of the Caltech in Pasadena, California, manages the Mars Science Laboratory Project for the NASA Science Mission Directorate, Washington, and built the project’s Curiosity rover.

For more information about Curiosity, visit and

Image Credit:NASA/JPL-Caltech/MSSS
Image Addition Date:2017-02-27