Approve the Cookies
This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies. Read More.
OK
Index  •   • New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
New posts  •   • RTAT  •   • 'Best of'  •   • Gallery  •   • Gear  •   • Reviews
Register to forums    Log in

 
FORUMS Photography Talk by Genre Astronomy & Celestial Talk
Thread started 12 Aug 2017 (Saturday) 16:14
Prev/next
sponsored links
(this ad will go away when you log in as registered member)

Total solar eclipse... Sigma 50-500mm or Meade 1,000mm f/10 SCT?

 
OpenTrackRacer
Member
OpenTrackRacer's Avatar
78 posts
Joined Dec 2009
Aug 12, 2017 16:14 |  #1

So, I'm prepping my gear for the eclipse and just loaded my 6D, 7D, 17-40L and Sigma 50-500mm "Bigma" when I go looking for my solar filter. As I grab that I see the Meade 5" 1,000mm f/10 SCT that I use as a guide scope on my Meade 10" LX-200. I kinda forgot about that thing!

I'd love to hear opinions on whether I should shoot with the Sigma 500mm or the Meade 1,000mm.

Thanks!


Underground Explorers
MSHA Part 48 Certified Underground Miner
National Cave Rescue Commision Certified Search and Rescue

http://www.underground​explorers.com (external link)
http://www.facebook.co​m/undergroundexplorers (external link)

LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as registered member)
Celestron
Cream of the Crop
8,397 posts
Gallery: 1 photo
Joined Jun 2007
Texas USA
Aug 12, 2017 21:30 |  #2

If you want all the Corona use the 50-500 . The 5" being f10 might hender getting the corona .




LOG IN TO REPLY
Nighthound
Cream of the Crop
Nighthound's Avatar
Joined Aug 2007
Aug 13, 2017 13:55 |  #3

I personally would go with a refractive optical tube or lens over a catadioptric optical tube. The long focal length of the SCT sounds tempting but the combination of thermal currents inside the SCT and the longer focal length in even a moderately unstable atmosphere could result in poor image quality. We'll have the sun high in the sky here on the southeast coast and given that it's August it's going to be HOT. I have a Newtonian that's 800mm but i opted to get a filter for my 500mm lens and add the teleconverter for 700mm. I didn't want to have to deal with a mount and the other gear to support it, especially since I'm traveling to get to totality. For me the lens on a gimbal and tripod is perfect for the job.


Steve
Canon Gear: 1D Mark IV | 1D Mark II | 5D | 20D | 500L IS (f/4) | 100-400L
My Astro Gallery http://s3.photobucket.​com ...7/Nighthd/POTN%20Ga​llery/external link

LOG IN TO REPLY
MalVeauX
"Looks rough and well used"
MalVeauX's Avatar
Joined Feb 2013
Florida
Aug 13, 2017 16:30 |  #4

Use whatever you want. 1,000mm with a full frame sensor is going to frame it up with lots of room to spare because the corona and the plumes extend out rather far, you will want several degrees FOV for all of it with a little room to spare, which a 6D + 1000mm will do with lots of room to spare. But you'll need tracking to really make this work well. If you're not using tracking, then you will want to use a wider FOV, so in that case, use the Sigma.

You will not have issues with heat with an appropriate filter. You're imaging in white light and it will be a totally void surface, so there's no special image quality to worry about at this scale. You will not be at a scale to see convection cells. You will just see a disc. So don't worry about using your SCT or not, it's fine. Worry about getting a good FOV depending on your ability to track and how you're going to image.

Personally I'd use the smallest simplest setup with the fastest control so that you can enjoy the eclipse and not fuss with equipment. I use tracking though, so I can image at high resolution scales. It's much, much easier to do this at low resolution scale, and I recommend a lower scale for simplicity. If you don't have a tracker, you will need to keep it really wide and be ok with a small low resolution scale.

Very best,


My Flickr (external link) :: My Astrobin (external link)

LOG IN TO REPLY
OpenTrackRacer
THREAD ­ STARTER
Member
OpenTrackRacer's Avatar
78 posts
Joined Dec 2009
Aug 19, 2017 01:45 |  #5

I decided to punt and bring both the Sigma 50-500 and the SCT. I have room so... I'll be using a geared tripod head which makes tracking fairly easy. I did some tests and I think I have enough FOV with the 6D and the SCT. I like that combination because I can get seven exposure bracketing with the 6D while the 7D only does three exposures.

We'll know what's best soon enough!


Underground Explorers
MSHA Part 48 Certified Underground Miner
National Cave Rescue Commision Certified Search and Rescue

http://www.underground​explorers.com (external link)
http://www.facebook.co​m/undergroundexplorers (external link)

LOG IN TO REPLY
Celestron
Cream of the Crop
8,397 posts
Gallery: 1 photo
Joined Jun 2007
Texas USA
Aug 19, 2017 10:16 as a reply to OpenTrackRacer's post |  #6

The SCT won't get the corona tho but great close ups .




LOG IN TO REPLY
sponsored links
(this ad will go away when you log in as registered member)

521 views & 2 likes for this thread
Total solar eclipse... Sigma 50-500mm or Meade 1,000mm f/10 SCT?
FORUMS Photography Talk by Genre Astronomy & Celestial Talk


Not a member yet? Click here to register to the forums.
Registered members get all the features: search, following threads, own gear list and ratings, likes, more forums, private messaging, thread follow, notifications, own gallery, settings, view hosted photos, own reviews and more...


AAA

Send feedback to staff    •   Jump to forum...    •   Rules    •   Index    •   New posts    •   RTAT    •   'Best of'    •   Gallery    •   Gear    •   Reviews    •   Polls

COOKIES DISCLAIMER: This website uses cookies to improve your user experience. By using this site, you agree to our use of cookies. Privacy policy and cookie usage info.

POWERED BY AMASS 1.4version 1.4
made in Finland
by Pekka Saarinen
for photography-on-the.net
Spent 0.00115 for 4 database queries.
PAGE COMPLETED IN 0.02s
Latest registered member is alessandro
965 guests, 482 members online
Simultaneous users record so far is 6106, that happened on Jun 09, 2016