Jump to content


Photo

Canon Rebel T5

  • Please log in to reply
10 replies to this topic

#1 Space Hunter

Space Hunter

    Explorer 1

  • -----
  • Posts: 95
  • Joined: 28 Mar 2014
  • Loc: LI NY-Italia

Posted 06 August 2014 - 11:08 PM

ok so 1st issue my tracking is not set so i get small trails do not no how to fix that second my images are very grainie i guess the T5 is not good for astophoto but i thought every dslr would be at least some what fine i dont know if mabey im doing something wrong with the settings or what but i dont want to get the 60DA and find out my T5 was fine all along

see grainie nonsense and i can only take about a 10 sec image before its too blury due to tracking help please lol

IMG_1062_zpsab7418cc.jpg



#2 Jerry Lodriguss

Jerry Lodriguss

    Vendor

  • *****
  • Vendors
  • Posts: 3702
  • Joined: 19 Jul 2008
  • Loc: Voorhees, NJ

Posted 06 August 2014 - 11:17 PM

The image you posted does not look trailed to me.

 

It looks like it was shot at quite a long focal length if that is full frame.

 

The image is "grainy" because your exposures are not long enough.

 

Longer exposures at long focal lengths are going to trail if you don't guide them.

 

Solutions are simple lol: shoot with a shorter focal length or start guiding.

 

It's not the camera, it's the operator! 

 

Jerry


Edited by Jerry Lodriguss, 06 August 2014 - 11:17 PM.

  • torsinadoc likes this

#3 Space Hunter

Space Hunter

    Explorer 1

  • -----
  • Posts: 95
  • Joined: 28 Mar 2014
  • Loc: LI NY-Italia

Posted 07 August 2014 - 12:48 AM

The image you posted does not look trailed to me.

 

It looks like it was shot at quite a long focal length if that is full frame.

 

The image is "grainy" because your exposures are not long enough.

 

Longer exposures at long focal lengths are going to trail if you don't guide them.

 

Solutions are simple lol: shoot with a shorter focal length or start guiding.

 

It's not the camera, it's the operator! 

 

Jerry

you obv did not understand im not talking about this photo this photo was for the gain i have a focal reducer as far a tracking or guiding as you say watever my mount is not doing that i have it set to sidereal but i get trails if its too long of an exposure otherwise its very very bright and grainness once again not understanding but i dont xpect "certain" people to thanks



#4 thgr8houdini

thgr8houdini

    Explorer 1

  • -----
  • Posts: 61
  • Joined: 01 Apr 2014
  • Loc: Wisconsin, USA

Posted 07 August 2014 - 01:49 PM

From your signature, it looks like you are using a Celestron AVX and a C8 with focal reducer. That's still a reasonably long focal length (~1200mm if my math isn't horrible today). You'd definitely want to make sure you get a very good polar alignment, especially if you aren't guiding. Like Jerry said, I would definitely recommend getting a guider set up that you can use with your AVX. Not sure if something like the Orion magnificent mini auto guider would cut it for this size scope or not, but it would certainly be better than no guiding! That will go a long way to avoiding trailing.


  • Space Hunter likes this

#5 shan1987

shan1987

    Mariner 2

  • -----
  • Posts: 207
  • Joined: 01 Apr 2013

Posted 07 August 2014 - 03:10 PM

The t5 is great for ap(the only be thing a 60da has on it is red sensitivity) if there is too much grain at 10 seconds and you are having troubles with polar alignment and don't want to guide you can stack your images to reduce grain... However 10 seconds is still not long enough to correctly expose the image at f6.3 ... I know it's a pain in the arse but try and try again to improve polar alignment. Try to get enough exposure to get your histogram at least 1/3rd of the way off the left wall wth no more than 1600iso (for more info on this look up expose to the right imaging) to really get good depth without noise you need at least 1-4 hours of stacked exposure time
  • Space Hunter likes this

#6 Jerry Lodriguss

Jerry Lodriguss

    Vendor

  • *****
  • Vendors
  • Posts: 3702
  • Joined: 19 Jul 2008
  • Loc: Voorhees, NJ

Posted 07 August 2014 - 04:45 PM

No ur rite Im won of em "certain" peoples who don understan lol


  • mfulmer, Raginar and shan1987 like this

#7 Darrenlh

Darrenlh

    Lift Off

  • -----
  • Posts: 15
  • Joined: 08 Sep 2010

Posted 08 August 2014 - 05:32 PM

Jerry, you have the patience of a saint... you can lead a horse to water...


  • Raginar likes this

#8 Raginar

Raginar

    Fly Me to the Moon

  • *****
  • Posts: 6138
  • Joined: 19 Oct 2010
  • Loc: Rapid CIty, SD

Posted 08 August 2014 - 05:43 PM

Jerry, you're the best. Sorry for that.

#9 Jerry Lodriguss

Jerry Lodriguss

    Vendor

  • *****
  • Vendors
  • Posts: 3702
  • Joined: 19 Jul 2008
  • Loc: Voorhees, NJ

Posted 08 August 2014 - 05:56 PM

Hi Guys,

 

Thanks for the vote of confidence.

 

I *thought* I answered "Space Hunter's" questions (once I decoded them) with specific answers, but I guess not to his satisfaction.

 

Sigh.

 

Maybe the aliens in his sig can answer them. :-)

 

Jerry



#10 th3r3ds0x

th3r3ds0x

    Sputnik

  • -----
  • Posts: 40
  • Joined: 17 May 2014
  • Loc: SE Louisiana

Posted 08 August 2014 - 06:11 PM

Jerry,

 

Perhaps he should read one of your books.  I have two them by the way, they're great!  Keep up the great work.

 

Sean



#11 Space Hunter

Space Hunter

    Explorer 1

  • -----
  • Posts: 95
  • Joined: 28 Mar 2014
  • Loc: LI NY-Italia

Posted 08 August 2014 - 08:27 PM

hhahahah jerz uhh tfpfnjasfsgalttiitaoadb <---------------- :lol: 








Cloudy Nights LLC
Cloudy Nights Sponsor: Astronomics