Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Canon EOS dSLR

Reply
 
Thread Tools Search this Thread
Old Feb 21, 2005, 12:33 AM   #1
Junior Member
 
Join Date: Nov 2004
Posts: 22
Default

Hello, I have to buy a telezoom for my canon 20d. I am thinking of sigma 50-500 or sigma 80-400 OS (Optical stabilizer). What you guys suggest ? Do you guys know the main difference between both lens? Any suggestion ? What's better? Thanks, Alexandre
afocante is offline   Reply With Quote
Sponsored Links
Old Feb 21, 2005, 8:39 AM   #2
NHL
Senior Member
 
NHL's Avatar
 
Join Date: Jun 2002
Location: 39.18776, -77.311353333333
Posts: 11,547
Default

They both have something the other lack:
1. The 50-500 has 'HSM' - faster and quieter focus with full-time manual AF overide
2. The 80-400 has 'OS' - has optical stabilizer but not as fast in focus.

... Going strictly by MTF the 50-500 is slightly better :idea:

NHL is offline   Reply With Quote
Old Feb 21, 2005, 9:03 AM   #3
Senior Member
 
surfnron's Avatar
 
Join Date: Jun 2003
Posts: 578
Default

NHL,
I've seen these charts before, but have never found an explination of how to read them. Can you point me in the right direction?
Thanx,
Ron :?:

Never mind, I did a Google search and came up with this site:
http://www.bobatkins.com/photography.../mtf/mtf1.html
surfnron is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 10:10 AM.