Monthly Archive: February 2010

Feb 07 2010

Final Reprocess of M66 First light with Edge 800HD

I had a chance to clean up image some more.  In looking at my exposures I was very limited in what ones to use.  Learned a few lessons this time out.  Next time I will be better prepared to capture some more exposures.  Here is a touch up of original image.  I removed some more noise using NEAT. 

M66 First Light with Edge 800HD and Canon Xsi

 

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Feb 05 2010

Ease of Focusing with Bahtinov Mask

During last nights frigid imaging session I used my two Bahtinov Mask’s for focusing the imagers.  This is a very fast process and makes life much easier.  If you image, I highly recommend that you look at making your own mask from online sources or buy one for your telescope, they are a cheap but valuable tool for your imaging equipment. 

Out of Focus Bright star through Bahtinov Mask

The middle beam of light is almost centered we are approaching focus

 

Bright star near perfect focus using Bahtinov Mask

80mm and 8 inch Bahtinov Mask Notice hangers on 80mm and center cutout on the 8 inch Mask

 If you look at the above image you will notice that the 80mm mask has little tabs or plastic screws these make it quick to hang over the end of your OTA.  The 8 inch mask has its center cutout so that it likewise quickly goes onto the Edge 800HD OTA, this could aslo be hung.  Total time to hang one and to achieve critcal focus using 10 second exposures or live view should be less than a minute once you get the hang of using a mask.  This is the fastest and most accurate focusing method I have seen yet without having electronic marked focuser etc on a permanent setup. 

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Feb 05 2010

A quick update on tonight’s imaging session

I began my adventure today setting up around 3pm in winds of 20-30mph and temps in the mid teens.  All I can say is it was brutal, but I continued anyways, not wanting to miss an opportunity to try out the new gear.  I took a few pictures in the process of setting up for the night.  I did end up using the Canon Xsi on the Edge 800HD ota for imaging and my DSI IIIC for guiding with PHD.  I ran into a few snags early on including not being able to find the ac power adapter for my Canon, so I ended up running on batteries.      

Setting up the gear to image in very cold and windy weather

 The setup of the gear went fairly fast considering the cold and windy weather.  I was waiting for stars to show themselves around 6pm so I could get my initial alignment in.   The first big snag came as the wind was blowing in hard from the West.  I had just completed using my polar scope to quick align scope mount and began my 2 star alignment.  The polar scope alignment was quick and simple.  The star alignment though was very obviously running into some serious errors.  I tried three times to get it going, but it was way off on alignment stars.  I then remembered that I had set the OTA orientation within the hand control to favor East 90.  This was done because I had read somewhere that with the side by side setup this was setting to choose because the saddle is turned by 90 degrees at initial startup.  I quickly went through menu and changed ota orientation back to normal.  The mount does not care where your starting point is alignment marks etc, it knows the starting point and that is all that matters!  At this point the wind was full force and my hands had grown numb, so I headed inside to warm up with some coffee.       

Both scopes with Bahtinov Masks attached as I was setting up

After warming up I came back out to tackle the alignment, confident I had fixed the problem.  This was my first time using the side by side setup outdoors.  I proceeded to align the scope without any further issues.  The gotos were nailing the alignment stars dead on and I was happy.  I placed the scope up onto Sirius and hooked up my Canon Xsi to the Edge 800 HD Ota.  I then placed the Bahtinov Mask onto the end of the optical tube.  I had the Canon EOS utility open,  after some help via messenger from Ray Shore, I found where to change the bulb setting, and proceeded to focus the scope.  It took only two ten second exposures(these could be reduced in exposure time) to obtain focus with the mask; the whole process may have taken about 1 minute. 

The next step was to get PHD started and to focus my DSI IIIC on my Meade 80mm ED 5000 APO.  PHD has a live view window which allowed me to place the mask on the OTA and achieve focus in less than 20 seconds!  I could  not live without the mask which my friend Alex strongly swore by when I was setup as his observatory this past October.       

Quick test of PHD using Sirius as the Image and a nearby star to guide. I had never guided before this night.

      

Looking to the North during intial setup the cameras were later changed

The time was now 745 pm,  I was frozen but  the winds were beginning to die down somewhat.   I realized  I did not have the ac adapter for the Canon(Ray was at other end of messenger relating to equipment snafus!), I decided to continue on, using the two batteries I had for the camera.  I  took another break to let the wind die down and came back out to do a test of PHD, using Sirius as my main image(above overexposed).  I found a guide star and ran a few tests.  I experimented with PHD a bit, then decided it was time to try my hand at M42 before it was out of view behind a tree.  I hit goto on M42 and the scope swung around and nailed the target.  I looked at my live display  realizing  my guidescope was looking directly into the top branches of the tree nearby.  M42 was a no go.  I was disappointed but decided to take a look at Starry Night to see what objects were nearby.  I settled on moving over to M66.  I was cold, at this point having a hard time thinking or even moving my fingers, looking back, now that I am rested and warm ,I should have centered both galaxies(DUH).  It is amazing what cold weather can do to the brain.  The brain shuts all rationale thoughts down to concentrate on keeping the body warm.     

I found an alignment star fairly easily and decided to do a quick 1 minute exposure to see what was in the FOV.  I could see two galaxies, not a perfectly framed picture but the cold was setting in, I was game (My Brain was Elsewhere).  I set the Canon on up in the EOS utility to capture 8 images, iso 800; at 5 min exposures each, hit start then walked inside to warm up again.  I have not had time yet to go through all of the images, but I did manage to whip a quick image together.  I am still new to processing, this is a very crude picture.  Not the best framing, but something to show at this point.  You can see the field is flat for the new Edge 800HD OTA.     

My first quick process of M66

It is getting very late past 4am,  I still have to break the gear down for the night.  I will post some more updates after getting gear in and some sleep accomplished.  Some minor updates posted later on.  

Cropped M66

       

Messing around with NEAT

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Feb 03 2010

Weather Update

I have one last night at work then few days off.  I just checked the weather and it looks like I have a go to setup outdoors both Thursday and Friday Nights.  It will be cold, 12F-13F but the skies are predicted to be good.  It will be some cold weather to try out the new gear in but I am totally game at this point.  If the setup and prep go smooth I should have plenty of  time to grab some photons!

I will setup in mid afternoon and grab some good pics outdoors with the new rig.  I will make sure I have some extra handwarmers to keep the handcontrol nice and cozy.  This will be a good test of the gear in cold weather along with my own endurance.  I do recall many years ago with my friend Alex of Zengineering , setting up my 12″ LX-200GPS and his 20″ Obsession up one day in weather around 5F and staying out all night with the gear to about 330am.  We had his portable trailer which had his custom computer stations inside with internet available to them via cell phone.  We also had a small portable heater in his trailer.  It was one cold night I will never forget.  We froze but we had fun that night and our gear peformed flawless in the weather.  May have to pack up a bottle of Rebel Yell from the SCT Group to keep warm and toasty.  

I was checking out updates on Ray Shore’s AstroPhotography-Tonight site, and was pumped when I saw that he had some decent weather to try out his new CGEM and DSLR.  I have been corresponding quite a bit with Ray these past few months and we are both determined to provide some good content on the CGEM mount and extras through both of our sites.  Ray has been a valuable source for me to follow on the CGEM mount and astrophotography in general.  We both share a great passion for astronomy.  I look foward to his reviews every day, and likewise will share some of my own on Daltonskygazer. 

I am hoping all goes well and I have some new guided images to post up over the weekend.  If autoguiding goes well I plan on going with some very long exposures to really test the mount out.  I hope to have several new images available, most particuliarly some images with the new Edge 800HD and also with the Canon Xsi 450.  Stay Tuned!

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