Kreutz SunGrazer Lovejoy - Page 30

glenc (Glen) · #**581** 26-01-2012, 02:57 AM

Justin, Coops, Lester and Rob are doing a great job recording the comet's daily changes.

Lester · #**582** 26-01-2012, 09:53 AM

Thanks Rob and Glen for your comments. Top image again Rob, good to see. I did a seperate stack of the 1600 and 800 ISO exposures from last night and the results were no different. So double the exposure time for ISO 800 IMO isn't worth it, better to get more images at ISO 1600.

All the best.

tilbrook@rbe.ne (Justin Tilbrook) · #**583** 26-01-2012, 11:19 AM

Hi,

Lester another great image!
Looks like your really having to push the exposures now.
Rob, thats amazing!
Is your camera cooled? if not even more so.

Cheers,

Justin.

Lester · #**584** 26-01-2012, 11:59 AM

Thanks Justin for your comments. Yes the only trick I may have up my sleeve is the 5D MK ll that has just arrived, but only a standard camera. It may be able to shoot at higher ISO with less grain than the 40D.

I think Rob uses a standard 400D, which goes to show the skill of the man.

All the best.

Rob_K · #**585** 26-01-2012, 12:03 PM

Thanks Glen, Lester, Justin.

Quote:

Originally Posted by tilbrook@rbe.ne

Hi,

Rob, thats amazing!
Is your camera cooled? if not even more so.

Not cooled, modded or anything Justin, just the basic 400D with 18-55mm kit lens. It was quite warm last night too. I do have pretty good dark skies although last night it looked a tad milky to me so I was surprised that I got anything.

Cheers -

tilbrook@rbe.ne (Justin Tilbrook) · #**586** 26-01-2012, 12:31 PM

Thanks Rob,

Thats inspired me to have another go, weather permitting.

Cheers,

Justin.

tilbrook@rbe.ne (Justin Tilbrook) · #**587** 26-01-2012, 01:11 PM

Hi,

I processed a single frame from the 23rd.

1100D - 18 to 55 zoom at 21mm f/3.5 ISO 1600 240sec exp.

I'm amazed it's there!

Goes to show that I should process all potential frames, even though there doesn't appear to be anything on the image.

Gives me hope for tonight.

Cheers,

Justin.

Lester · #**588** 26-01-2012, 04:24 PM

Good result Justin.

Windy here from the SE and clear.

Stefan Kurti (Stefan) · #**589** 26-01-2012, 10:51 PM

Greetings from Slovakia, Europe!

I can not hardly tell anything about comet itself, but I was able to do interview with the discoverer - Terry Lovejoy.

Although some of you certainly know him personally and better, I hope there are still people to whom it might be interesting reading.

You can find it here:

http://www.skaw.sk/enlovejoy.htm

So, enjoy!

Stefan

tilbrook@rbe.ne (Justin Tilbrook) · #**590** 26-01-2012, 11:11 PM

Hi,

I'm back in the game.

Here's a single image for the 26th.

Canon 1100dD
Lens 18 to 55 zoom at 18mm f/3.5 ISO 1600 300 sec.

Directly into photoshop and gradient mapping applied.

More later.

Cheers,
Justin.

Lester · #**591** 26-01-2012, 11:37 PM

Welcome Stefan, and excellent article on Terry, I enjoyed the read.

Good on ya Justin for squeezing the most out of your images.

I am shooting the comet now with new 5D MK ll at ISO 6400, can see the image easily on the rear view screen, so it has potential.

All the best.

Lester · #**592** 27-01-2012, 07:51 AM

Hi all,

been having some issues trying to stack the images in DSS from the 5D MK ll, the corners of the frame are not registered.

This is only a 4 exposure stack 90 seconds at ISO 6400 with 50mm lens at F2.

http://i638.photobucket.com/albums/u...s/8d2ce578.jpg

This is 12x90 second exposures with 5D and 24mm lens at F2, ISO 6400. Again DSS is having a problem with registering the whole FOV.

http://i638.photobucket.com/albums/u...s/6f92fc13.jpg

Lester · #**593** 27-01-2012, 08:10 AM

This is 4 x 150 second exposure with 5D at ISO 6400 using 24mm lens at F2. Bright meteor running parallel to the comet.

http://i638.photobucket.com/albums/u...s/910650bc.jpg

CometGuy · #**594** 27-01-2012, 11:39 AM

Excellent work Lester and Justin. The region near the head seems to still have a bit more brightness and would problably show up well with a longer lens. We have had close to 400mm of rain here last couple of days with rain/cloud on the forecast for the next week, so no chance of follow up observations here for a while

So its great you guys are still giving it coverage.

Oh and Stefan thank you for posting the article!

Terry

Liz · #**595** 27-01-2012, 11:43 AM

Well done Lester, looks like the new camera is doing a great job.

Lester · #**596** 27-01-2012, 11:51 AM

Thanks Terry and Liz.

Yes Liz I even think it may be better than the Astro 40D that can easily fog the frame if exposures are too long. The 5D didn't show any sign of fogging the frame at 150 seconds at ISO 6400. That would be equal to 600 seconds at ISO 1600, and at half that the 40D was fogging the frame.

All the best.

Lester · #**597** 27-01-2012, 12:31 PM

8x6 minutes exposures with Astro 40D at ISO 1600 and 24mm lens at F2.

http://i638.photobucket.com/albums/u...s/f5567186.jpg

tilbrook@rbe.ne (Justin Tilbrook) · #**598** 27-01-2012, 05:12 PM

Hi,

Thanks Terry and Lester.

Lester the new camera seems to delivering good images, it will be nice some DSO shots from it.

Cheers,

Justin.

Rob_K · #**599** 27-01-2012, 10:56 PM

Fantastic work Lester & Justin!

Very murky sky here tonight, doesn't look like I'll be getting a shot.

Lester, I 'operated' a bit on yours (26th) and it seems to show the tail pretty much into the Milky Way, or 31 degrees. The 5D seems to be working a treat!

Cheers -

Lester · #**600** 27-01-2012, 11:18 PM

Thanks Justin and Rob for your comments. Just waiting for my wife to get home from her pub crawl with girl friend, so she can keep an ear out for the grandchildren as they sleep.

I am keen to try even longer exposures at ISO 6400 as there was no sign of fogging the frame at 150 seconds.

All the best.