#1  
Old 18-05-2008, 08:42 PM
gmbfilter (Geoff)
Geoff

gmbfilter is offline
 
Join Date: Mar 2007
Location: South Tacoma NSW
Posts: 571
Help with Canon lens

Have recently gone mad and purchased 40D. It came with a 17-85 IS lens and I would like to get EF 70-200mm telephoto Zoom. I don't care about Image Stabilisation. However I don't understand enough about the differences between the f2.8 and f4. How much difference does it make?
Any help would be great.
Reply With Quote
  #2  
Old 18-05-2008, 08:56 PM
Suzy_A's Avatar
Suzy_A
Registered User

Suzy_A is offline
 
Join Date: Jan 2006
Location: Fremantle
Posts: 237
Both the f4 and the f2.8 are very, very good lenses. The main difference is that the f4 is a LOT lighter but the exposure times to get the same result are obviously going to be longer for the f4. The f2.8 has a lot more glass and a lot more metal in it.

If you want use the lens for general - and in particular holiday - photos, the f4 is much better. Probably the IS f4 actually, then you can hand-hold without any problems in reasonable light.

But if you want to use it mainly for astro and you are not going to carry it up the top of mountains on your holiday, then the f2.8 is better.

I got the 2.8 non-IS. The images are just ever so slighter sharper and brighter than the IS version. Also the non-IS are quite a bit cheaper.
Reply With Quote
  #3  
Old 19-05-2008, 08:31 AM
gmbfilter (Geoff)
Geoff

gmbfilter is offline
 
Join Date: Mar 2007
Location: South Tacoma NSW
Posts: 571
Thanks for that. Going for f2.8.
Reply With Quote
  #4  
Old 23-05-2008, 01:25 AM
AlexN's Avatar
AlexN
Tunnel Vision

AlexN is offline
 
Join Date: Mar 2008
Location: Caboolture, Australia
Posts: 6,801
Good decision mate!

You Will Not Be Disappointed
Reply With Quote
  #5  
Old 25-05-2008, 11:42 PM
Ian Robinson
Registered User

Ian Robinson is offline
 
Join Date: Jan 2007
Location: Gateshead
Posts: 2,205
So am I , I splashed out and told them I wanted the IS model , I don't just use my camera mounted on a telescope or a GEM and I want the added weather proofing too.

I am now officially BROKE for a while and will have start saving my pennies again.
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 06:32 PM.

Powered by vBulletin Version 3.8.7 | Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Advertisement
Bintel
Advertisement
Testar
Advertisement