#1  
Old 24-11-2010, 10:17 PM
dannat's Avatar
dannat (Daniel)
daniel

dannat is offline
 
Join Date: Sep 2007
Location: Macedon shire, Australia
Posts: 3,363
Best useful medium lens

having just recently bought my first canon - why is the most useful lens for taking astro shots at the medium end..i am thinking between 50mm(which is a common size for widefields) & 500mm - where most refractors start to kick in
i find it strange the 200mm canon prime goes for apparently less than the 70-200mm..is the zoom that good?
Reply With Quote
  #2  
Old 24-11-2010, 10:30 PM
dugnsuz's Avatar
dugnsuz (Doug)
to baldly go...

dugnsuz is offline
 
Join Date: Aug 2005
Location: Hahndorf, South Australia
Posts: 4,200
Quote:
Originally Posted by dannat View Post
having just recently bought my first canon - why is the most useful lens for taking astro shots at the medium end..i am thinking between 50mm(which is a common size for widefields) & 500mm - where most refractors start to kick in
i find it strange the 200mm canon prime goes for apparently less than the 70-200mm..is the zoom that good?
I can see you're on a slippery slope Daniel!
You are going to need to start looking at MTF charts and lens comparisons soon.
So I'll start you off!
This is a great site to compare lens performance side by side, in this case the 200mm prime v's the 70-200 IS zoom...
http://www.the-digital-picture.com/R...mp=4&APIComp=0
L-R mouse over the image to compare the 2 lenses.

The nifty 50 (Canon 50mm f1.8) stopped down is a great budget prime but my 70-200mm f4L IS is my widefield weapon of choice (The non-IS version is equally as good and way cheaper)
I've got a 24-70 f2.8L which I've yet to really give a good go under the stars.
Doug
Reply With Quote
  #3  
Old 24-11-2010, 11:39 PM
Octane's Avatar
Octane (Humayun)
IIS Member #671

Octane is offline
 
Join Date: Dec 2005
Location: Canberra
Posts: 11,159
You can't go wrong with the 200mm f/2.8L II USM. I've got one and also the 70-200mm f/2.8L USM.

I took a few shots with it on the modified 40D and it's a corker.

The 200mm will eventually make its way on to the STL.

H
Reply With Quote
  #4  
Old 27-11-2010, 09:15 AM
hotspur's Avatar
hotspur (Chris)
Registered User

hotspur is offline
 
Join Date: Apr 2009
Location: south east QLD,Australia
Posts: 2,850
re canon lenses

Its all down hill here for you dannat,one you get on the canon lens train you will need another and another!

One of my most favourite and useful canon lenses is a 17-55 F 2.8 IS lens.Not to be confused with the 18-55 kit lens.This lens is 77mm wide,amazing IQ,can focus on a black cat on a new moon night.the way it captures colour is amazing.Very handy for everyday use and the more demanding applications people have on these type of pages,You can buy a new one for around $1000 from DWI-well worth it.

Here is a astro image,This was taken about 5 months ago,been cloudy ever since
Attached Thumbnails
Click for full-size image (Copy of for reduceIMG_0252.jpg)
186.4 KB65 views
Click for full-size image (sunset taromeo.JPG)
186.7 KB72 views
Reply With Quote
  #5  
Old 27-11-2010, 05:54 PM
Octane's Avatar
Octane (Humayun)
IIS Member #671

Octane is offline
 
Join Date: Dec 2005
Location: Canberra
Posts: 11,159
Chris, that's a wide-angle lens. I think he's after something longer.

H
Reply With Quote
  #6  
Old 27-11-2010, 08:41 PM
dannat's Avatar
dannat (Daniel)
daniel

dannat is offline
 
Join Date: Sep 2007
Location: Macedon shire, Australia
Posts: 3,363
am i better to stick with canon own lens say the 70-200mm f4 - or are the sigma/tamron offerings at f2.8 OK?
Reply With Quote
  #7  
Old 27-11-2010, 09:14 PM
Octane's Avatar
Octane (Humayun)
IIS Member #671

Octane is offline
 
Join Date: Dec 2005
Location: Canberra
Posts: 11,159
Canon.

H
Reply With Quote
  #8  
Old 27-11-2010, 09:14 PM
hotspur's Avatar
hotspur (Chris)
Registered User

hotspur is offline
 
Join Date: Apr 2009
Location: south east QLD,Australia
Posts: 2,850
re lenses

Sorry,about that.

Yes,a canon 70-200 F4 would be a lovely choice,I'd keep away from non camera brand lenses.If you wanted F2.8 the canon non IS version is a very fine lens.approx $1200 from DWI

Not sure about using the f2.8 version for astro work would go,I tried a few times with mine,got lots of reflections in images,there must be a lot of glass inside,More likely I did not know how to use it for astro work.

If you want a really good long canon lens,the 400 L F5.6 is amazing!,I have used it a few times piggy back and one could really get some great images with that glass,if you could afford it now,its quite a reasonable price,compared to when I bought mine.Really great for wildlife too.

Chris
Reply With Quote
  #9  
Old 27-11-2010, 09:54 PM
DavidTrap's Avatar
DavidTrap (David)
Really just a beginner

DavidTrap is offline
 
Join Date: Jun 2009
Location: Brisbane
Posts: 2,828
Quote:
Originally Posted by hotspur View Post
Here is a astro image,This was taken about 5 months ago,been cloudy ever since
That was a nice night Chris - one of the last times I've had my gear out I think
DT
Reply With Quote
  #10  
Old 28-11-2010, 01:13 AM
jenchris's Avatar
jenchris (Jennifer)
Registered User

jenchris is offline
 
Join Date: Nov 2010
Location: Ormeau Gold Coast
Posts: 2,067
No no no you've all got it wrong.
The best lens is a Richey Chretien 1800 f4 on an EQ6 pro.
Pop your Canon on the end of that and you can have a lot of fun.
Reply With Quote
  #11  
Old 28-11-2010, 08:55 AM
hotspur's Avatar
hotspur (Chris)
Registered User

hotspur is offline
 
Join Date: Apr 2009
Location: south east QLD,Australia
Posts: 2,850
Quote:
Originally Posted by DavidTrap View Post
That was a nice night Chris - one of the last times I've had my gear out I think
DT
Yes,David-was the last time I had the roof of observatory for than half a hour.(I only roll it off and on once a month these days-for a quick check to see if still works)

That was 5 minute exp,just a basic image to see how the new lens went,Should be good with 5 or 6 images like that stacked.I hope it clears up in 6 months,so we can use the 10-22 on the milky way.

Chris
Reply With Quote
  #12  
Old 28-11-2010, 10:45 AM
koputai's Avatar
koputai (Jason)
Registered User

koputai is offline
 
Join Date: Nov 2007
Location: Canberra, Australia
Posts: 1,633
I have the Canon 70-200mm f/4 IS and it is a superlative lens. Truly awesome. It is well noted as being sharper than the 2.8, one of the sharpest lenses ever, from any company.

However, if you are after the lens for purely astro work, the 70-200's don't have a zoom lock. I'd probably be picking a prime like the 300mm f/4 and whacking on the IDAS LPS filter. As you probably know, Doug has been there, and his results speak for themselves!

Cheers,
Jason.
Reply With Quote
  #13  
Old 28-11-2010, 11:06 AM
hotspur's Avatar
hotspur (Chris)
Registered User

hotspur is offline
 
Join Date: Apr 2009
Location: south east QLD,Australia
Posts: 2,850
lenses

Jason,I am unfamiliar with the IDAS LPS filters for camera lenses for astro work,What does it do ?? I am interested in using my 400 L prime F 5.6 for more astro work (one year-when the clouds clear).

I think I saw Doug selling his 300 F4,I will have to get in touch with him to get some pointers.

The 300 L prime,is a very good lens,It was a hard choice for me,when I had to choose between it and the 400.

To the OP,just stick with canon,do not buy those non camera brand lenses,in the end they cost more than a L,the amount of frustration I have had with them,cost me a lot of money,wasted time,and missed out on opportunities I can never get back.

A canon non IS F4 70-200 are very reasonably priced at present,for what you want it does sound like a 300 L would be more suitable.

C
Reply With Quote
  #14  
Old 28-11-2010, 11:38 AM
koputai's Avatar
koputai (Jason)
Registered User

koputai is offline
 
Join Date: Nov 2007
Location: Canberra, Australia
Posts: 1,633
Chris,

The IDAS LPS is a light pollution filter from Hutech. Check it out here:

http://www.sciencecenter.net/hutech/idas/lps.htm

Cheers,
Jason.
Reply With Quote
  #15  
Old 30-11-2010, 09:19 PM
philiphart's Avatar
philiphart (Phil Hart)
Registered User

philiphart is offline
 
Join Date: Jan 2007
Location: Melbourne
Posts: 1,060
i've got the canon 200mm f2.8 and love it! have never used the 70-200mm so can't comment. i think it's rare to find a tamron etc that can cut it for astrophotography - i was very disappointed with a couple of wide sigma primes i owned a long time ago.

phil
Reply With Quote
  #16  
Old 05-12-2010, 08:46 PM
dannat's Avatar
dannat (Daniel)
daniel

dannat is offline
 
Join Date: Sep 2007
Location: Macedon shire, Australia
Posts: 3,363
thought i would close this thread wit this
Attached Thumbnails
Click for full-size image (IMG_0220.JPG)
53.9 KB86 views
Reply With Quote
  #17  
Old 05-12-2010, 11:46 PM
Octane's Avatar
Octane (Humayun)
IIS Member #671

Octane is offline
 
Join Date: Dec 2005
Location: Canberra
Posts: 11,159
Good man.

Congratulations, you are now the owner of one of the finest lenses in the line-up.

H
Reply With Quote
  #18  
Old 06-12-2010, 11:01 PM
Hans Tucker (Hans)
Registered User

Hans Tucker is offline
 
Join Date: Jul 2008
Location: Melbourne
Posts: 1,438
Quote:
Originally Posted by dannat View Post
thought i would close this thread wit this
I have been closely following this thread and will be looking out for results you post on this lens...I spied one up for sale on another website.
Reply With Quote
  #19  
Old 07-12-2010, 02:18 PM
Waxing_Gibbous's Avatar
Waxing_Gibbous (Peter)
Grumpy Old Man-Child

Waxing_Gibbous is offline
 
Join Date: Jul 2009
Location: South Gippsland
Posts: 1,768
Better late than never.
The 135 f2 would be my weapon of choice. Stopped down to between f4 and f8.
Second and not far behind would be the Sigma 150 or 180 Macros. These are totally underrated lenses, and while their AF is very slow compared to Canon's they lack nothing in sharpness or clarity. In fact Sigma's 180 is arguabley sharper than the Canon 180 at twice the price. They never hang around long on the B&S forums.
In joint second would be the 200 2.8 Canon L along with the preposterously awesome and unequalled Canon 300mm 2.8L. Well maybe the f4 version also.
Nothing like primes for AP IMHO.
Reply With Quote
Reply

Bookmarks

Thread Tools
Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +10. The time is now 03:19 AM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Advertisement
SkyWatcher Australia
Advertisement
Meade Australia
Advertisement
NexDome Observatories
Advertisement
Celestron Australia
Advertisement
OzScopes Authorised Dealer
Advertisement
Lunatico Astronomical
Advertisement
Bintel
Advertisement
Astronomy and Electronics Centre
Advertisement