Mar 18 2012

New Update and Website

The weather in the New England area is quickly changing, mildest winter I can recall.  Today temperatures hit 73F.  In coming weeks, I will be adding a new website which is an extension of DaltonSkyGazer.  The addition of the second website will allow me better format control of images produced from the observatory. My main site DaltonSkyGazer.com is managed via WordPress.  The new site TheDaltonObservatory.com ,  will be hardcoded via Dreamweaver, affording  more flexibility in my design elements.

Update 15 May 2012

As of 11 May 2012, I have placed the main template files of the new website on the server.  I decided on going with a Celestron color scheme at the website.  I will be working over next few weeks in the background preparing the content for the pages at the new site extension.

I  updated the color scheme of DaltonSkyGazer.com today, along with a few minor cosmetic additions; new header image, starfield background, etc. The new color scheme blends in with the new site extension colors.

 

 

Permanent link to this article: http://www.daltonskygazer.com/new-update-and-domain.html

Jan 12 2012

Celestron Releases Long Awaited Focal Reducers for Edge HD Optics

I just learned this morning that Celestron has finally released the long awaited for focal reducers for the Edge HD optics.  The focal reducers for the 11 inch HD and 14 inch HD OTA’s have been released.  I know many people have been waiting a long time for these reducers.  These new focal reducers are bit pricey listed at price of $599 each and show as being in stock.  This is large piece of finally machined glass, I do understand the price on these.  If they work great, which I am sure they will, homerun!

This is great news that Celestron came through on releasing the Focal Reducers, I am sure the wait will be worth it.  Each ota will require a specially configured focal reducer due to the way the HD optics field flattener is internal to the ota.  Many of us Edge 800HD owners  and also the Edge HD 925 owners will be awaiting a release date for focal reducers for these fine OTA’s  Fingers crossed!

I did recently stumble upon a quote from Celestron which was found in the questions section under the 800HD ota… This thought process makes me very happy! 

A similar situation exists for the production and first availability of EdgeHD focal reducers. Celestron wants to assure that they will be the same high quality as the EdgeHD telescopes and won’t compromise this goal to rush them on to the market.

 

The specs say they will take the telescope down one  full F stop (cutting photon gathering time by half) and increase FOV by approximately 43%.  They are listed as .7x reducers. 

 

Reducer Lens .7x – EdgeHD™ 1400

Reducer Lens .7x – EdgeHD™ 1100

 

 

 

 

Permanent link to this article: http://www.daltonskygazer.com/celestron-releases-long-awaited-focal-reducers-for-edge-hd-optics.html

Jan 01 2012

Happy New Year 2012 From DaltonSkyGazer Observatory

A  Happy New Year 2012 to all who follow the DaltonSkyGazer astro blog!

 

DaltonSkyGazer Observatory

The holidays are winding down, thought I would post an update on activites and such at the DaltonSkyGazer observatory.  I have been doing some visual observing along with a little astrophotography with my DSI III C camera.  I am happy to say that the warm control room area has been a blessing and works better than expectations.  The small ceramic heater I am using can be run on the low setting(300 watts) when temps are down to 10F outside and easily keeps the control room at 65F to 70F without any issues.  Warm up time is also quick on the control room when first running the heater for the evening.  I spent some time organizing the control room this past week, I decided to remove some extra clutter which was not needed in the observatory;    a printer, small refridge, and few tool items laying around.

I have not posted many updates recently been waiting for the arrival of a new imaging camera Canon 550D which has been placed on backorder, ordered up 28 November.  I am expecting shipping update this week after the New Years holiday.  Once the new Canon arrives I will be back to writing many articles and back into astrophotography again full bore.  I have also been recovering from blowing out a few discs in my back which happened in late July during Stellafane week.  I think a major cause of the back injury was hefting the 12″ scope up onto the wedge in the observatory while standing on 6ft ladder and having to extend way out to drop the base onto the bolt of the wedge.   The healing process has been bit slow taking me away from extra hrs spent in the observatory.

I am proud to say the blog has celebrated 2 years up as of this past December!   There  have have been over 70,000 page views per year to the site .   I have added a few small changes over the past few weeks to the observatory tab above and many new updates will be coming at faster pace in 2012.

Happy New Year to all!  Hope to finally be back into the AP game here in very near future when the Canon 550D arrives!

Be sure to check out some of the other astro blogs highlighted on my left hand tab.  Mike’s Astronomy Blog, Uncle Rod’s BlogSpot, Astrophotography Tonight, Telescope Man, Griceland Observatory , and Seal Killer’s Astrophotography Site.  All great blogs and great people from within  the astronomy community!

If you are interested in astronomy, I highly recommend joining Astronomy Forums.  The AF is the largest astronomy forum in the world.  If you have any astro related questions whether it be gear, astrophotography, accessories, etc,  be sure to check out  the Astronomy Forums. Joining the Forum is free and you will meet many great people with same interests from all over the world.

 

 

 

 

 

Permanent link to this article: http://www.daltonskygazer.com/happy-new-year-2012-from-daltonskygazer-observatory.html

Nov 06 2011

Using a Bahtinov Mask to Achieve Focus for Astrophotography

 

 

The use of a Bahtinov Mask is my preferred method for achieving critcal focus while set up for astrophotography.  A Bahtinov Mask can be bought for only a few dollars through any astronomy retailer or you can easily make your own mask via an online Bahtinov Mask generator. The task of focusing with a mask is easy to learn and quite fast once one becomes accustomed to using a mask.  

80 mm APO Triplet and Celstron 800 HD with Bahtinov Masks Attached
 
 
 
 
 
 
  
The basic steps to achieving focus with a Bahtinov Mask are highlighted in examples below:
 
With camera or imaging device attached slew telescope to a bright star.  Setup imaging software to take 2 to 5 second exposures.  I use Nebulosity 2.0 in the frame and focus mode.  Hang Bahtinov Mask over the end of the OTA, take a 2 to 5 second exposure. You may see out of focus view such as that in image below.

 

Out of Focus Bright star through Bahtinov Mask

 
 

The middle beam of light is almost centered very close to focus

 
The next step is to adjust the focuser and take another two to five second exposure.  The goal is to be close enough to focus to achieve the spiked star pattern seen on image to the right.  Once you have this pattern showing, make very small adjustments to focus and keep taking test exposures until you center the beam of light in between the diffraction spikes.
 
 
 
 
 
 
 
 
 
 
     
Bright star near perfect focus using Bahtinov Mask

Perfect focus is achieved when your final adjustment looks like the picture to the left.  You are now focused and ready to slew to the object you wish to image.  Don’t forget to remove the Bahtinov Focus Mask before commencing image run.  It is always good practice to take test exposure and preview your focus once on the object you wish to image.  You are now ready to frame your object and begin the nights imaging run.  This focusing method is very fast with practice and makes focusing a very simple task.

Permanent link to this article: http://www.daltonskygazer.com/using-a-bahtinov-mask-to-achieve-focus-for-astrophotography.html

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