Canon Digital Photography Forums  

Go Back   Canon Digital Photography Forums > 'Equipment Talk' section > Canon EF and EF-S Lenses
Register Rules FAQ Members List Search Today's Posts Mark Forums Read



Reply
 
Thread Tools Display Modes
Old 23rd of October 2008 (Thu)   #1
MinhThien
Senior Member
 
MinhThien's Avatar
 
Join Date: Apr 2008
Location: Vancouver, British Columbia
Posts: 1,626
Default 70-200mm f4 IS sweet spot?

Hi guys what is the sweet spot of your 70-200f4is? Mine isn't sharp at f4! In good lightning i think f8 looks best?
__________________
Eric
5D III | 24-70 L II | 70-200L II | 85L II | 430EX | 190CXPRO4 | 498RC2 | TT Turnstyle 20 | TT Navigator | TT Restro 7 | F-stop Kenti |
MinhThien is offline   Reply With Quote
This ad block will go away when you log in as member
Old 23rd of October 2008 (Thu)   #2
Dave Jenkins
Member
 
Dave Jenkins's Avatar
 
Join Date: Jun 2007
Location: The Beautiful Northwest Georgia Mountains!
Posts: 235
Default Re: 70-200mm f4 IS sweet spot?

Mine doesn't have a sour spot. It's sweet at every aperture. (5D, 70-200 f4L, 1/80th sec. @f4, ISO 3200)
Attached Images
File Type: jpg _MG_6791_web.jpg (79.4 KB, 348 views)
__________________
Dave Jenkins
<'}}}}><
My new book: Georgia: A Backroads Portrait http://blur.by/1gg1SMt
Architecture and People: www.davidbjenkins.com
My award winning book: Rock City Barns: A Passing Era: www.silvermaplepress.com
Dave Jenkins is offline   Reply With Quote
Old 23rd of October 2008 (Thu)   #3
AustinWolf
Member
 
Join Date: May 2005
Location: Devon, UK
Posts: 100
Default Re: 70-200mm f4 IS sweet spot?

f4 @200mm always looks sharp with mine.
Attached Images
File Type: jpg 20080330-IMG_3009-Edit-Edit.jpg (126.4 KB, 332 views)
__________________
*/Canon EOS 7D, Sigma 17-70, Canon 70-200L f4 IS, Nifty Fifty, Kenko Pro 1.4X, 500D/*
AustinWolf is offline   Reply With Quote
This ad block will go away when you log in as member
Old 23rd of October 2008 (Thu)   #4
MinhThien
Senior Member
 
MinhThien's Avatar
 
Join Date: Apr 2008
Location: Vancouver, British Columbia
Posts: 1,626
Default Re: 70-200mm f4 IS sweet spot?

omg! I guess i should send in my for service?
__________________
Eric
5D III | 24-70 L II | 70-200L II | 85L II | 430EX | 190CXPRO4 | 498RC2 | TT Turnstyle 20 | TT Navigator | TT Restro 7 | F-stop Kenti |
MinhThien is offline   Reply With Quote
Old 23rd of October 2008 (Thu)   #5
Jman13
Cream of the Crop
 
Jman13's Avatar
 
Join Date: Dec 2005
Location: Columbus, OH
Posts: 5,558
Default Re: 70-200mm f4 IS sweet spot?

If yours isn't sharp at f/4, then you need to send it to Canon or return it if it's new. The 70-200 f/4L IS should be absolutely tack sharp at f/4. Mine is as sharp at f/4 as my old 135L was at f/4. Not kidding.

These are both at ISO 1600 and f/4:





This is also at f/4:


100% crop of above:
__________________
Jordan Steele - http://www.jordansteele.com
Admiring Light - http://www.admiringlight.com

Last edited by Jman13 : 23rd of October 2008 (Thu) at 21:49.
Jman13 is offline   Reply With Quote
Old 23rd of October 2008 (Thu)   #6
gjl711
human (barely) and bribable
 
gjl711's Avatar
 
Join Date: Aug 2006
Location: Deep in the heart of Texas
Posts: 48,100
Default Re: 70-200mm f4 IS sweet spot?

Well, looking at photozone, it looks as if f/5.6 is going to be the sweet spot, but all are very good.
http://www.photozone.de/canon-eos/19...review?start=1
__________________
Not sure why, but call me JJ.

I wondered why the baseball was getting bigger, then it hit me
.
::Flickr::
::Gear::
gjl711 is offline   Reply With Quote
Old 23rd of October 2008 (Thu)   #7
n1as
Goldmember
 
Join Date: Oct 2007
Location: VT
Posts: 2,213
Default Re: 70-200mm f4 IS sweet spot?

Oh, you guys are SO WRONG. This lens definitely has a sweet spot.


... Attached to the front of my camera!


I echo what others are saying. It is prickly sharp at f/4. Yea, it gets better stopped down just a but but is it so good at f/4 that there is no reason to not shoot wide open.
__________________
- Keith -

http://darwinphoto.zenfolio.com

n1as is offline   Reply With Quote
Old 24th of October 2008 (Fri)   #8
Jimmer411
Thank god Im green.
 
Join Date: Sep 2007
Location: Enumclaw, WA
Posts: 819
Default Re: 70-200mm f4 IS sweet spot?

Razor sharp from f/4 up. From 70 to 200mm and even at mfd!
__________________
50D | Sigma 30mm f/1.4 HSM | EF 85mm f/1.8 USM | EF 70-200 f/2.8L IS II | 430EX | YN-460-II | RF-602 x2 |
Jimmer411 is offline   Reply With Quote
Old 24th of October 2008 (Fri)   #9
picturecrazy
soft-hearted weenie-boy
 
picturecrazy's Avatar
 
Join Date: Jan 2006
Location: Alberta, CANADA
Posts: 8,504
Default Re: 70-200mm f4 IS sweet spot?

if you get the shot in focus, that's the sweet spot. it'll always look nice.
the 70-200 series is legendary for a good reason.
picturecrazy is offline   Reply With Quote
Old 24th of October 2008 (Fri)   #10
nordstern1
Senior Member
 
nordstern1's Avatar
 
Join Date: Nov 2007
Posts: 1,303
Default Re: 70-200mm f4 IS sweet spot?

to the OP, mine is very sharp too like the others who commented here. dont immediately conclude that the equipment is faulty. can you pls post a sample of the pic/s that you say are unsharp?
__________________
JOE
G10 | 5D | 40D | 17-55 2.8 IS | 16-35 2.8 L II | 24-70 2.8 L | 70-200 2.8 IS L | 85 1.2 L II | 430EX
manfrotto | tenba | crumpler | clik elite | tamrac | op/tech | blackrapid | sandisk | b+w | marumi | giottos | mac | buffalo
nordstern1 is offline   Reply With Quote
Old 24th of October 2008 (Fri)   #11
MinhThien
Senior Member
 
MinhThien's Avatar
 
Join Date: Apr 2008
Location: Vancouver, British Columbia
Posts: 1,626
Default Re: 70-200mm f4 IS sweet spot?

Hi Joe!
I will post some F4 2morrow!
__________________
Eric
5D III | 24-70 L II | 70-200L II | 85L II | 430EX | 190CXPRO4 | 498RC2 | TT Turnstyle 20 | TT Navigator | TT Restro 7 | F-stop Kenti |
MinhThien is offline   Reply With Quote
Old 24th of October 2008 (Fri)   #12
bohdank
Cream of the Crop
 
bohdank's Avatar
 
Join Date: Jan 2008
Location: Montreal, Canada
Posts: 14,060
Default Re: 70-200mm f4 IS sweet spot?

I pretty much leave mine on f4... that says it all.
__________________
Bohdan - I may be, and probably am, completely wrong.
Gear List

Montreal Concert, Event and Portrait Photographer
Flickr
bohdank is offline   Reply With Quote
Old 24th of October 2008 (Fri)   #13
egordon99
Cream of the Crop
 
Join Date: Feb 2008
Location: Philly 'burbs
Posts: 10,243
Default Re: 70-200mm f4 IS sweet spot?

+1

I think once I had it stopped down a bit, but f/4 works for me
egordon99 is offline   Reply With Quote
Old 24th of October 2008 (Fri)   #14
Daan37
Member
 
Daan37's Avatar
 
Join Date: Apr 2008
Location: Netherlands
Posts: 414
Default Re: 70-200mm f4 IS sweet spot?

f/5.6 over the entire zoom range, but f/4 is no slouch either. Although IS seems to affect sharpness negatively mainly at f/4 at the shorter end of the zoom range. It is sharpest from 100mm to 200mm, with 135mm being sharpest (equally sharp as my 135L at comparable apertures). It suffers from softness and lack of contrast at 200mm MFD (it clears up at 200mm and 2.5 meters shooting distance though).
Daan37 is offline   Reply With Quote
Old 24th of October 2008 (Fri)   #15
TaDa
...as cool as Perry
 
TaDa's Avatar
 
Join Date: Feb 2008
Location: New York
Posts: 6,723
Default Re: 70-200mm f4 IS sweet spot?

Agreed with the others, mine was sharp at f/4, could cut you at 5.6
__________________
Name is Peter and here is my gear:
Canon 5D II, Canon 7D, Canon 40D
Glass - Zeiss 21 f/2.8 ZE, Canon 35 f/1.4L, Canon 40 f/2.8 STM, Canon 24-70 f/2.8
L, Canon 85 f/1.2L II, Canon 70-200 f/2.8L IS II, Canon 500 f/4L IS
Speedlite 580ex II, 430ex - Gitzo GT-3541XLS w/ Arca B1
TaDa is offline   Reply With Quote
Reply


Thread Tools
Display Modes

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

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
what's the sweet spot kja Canon EF and EF-S Lenses 3 22nd of June 2008 (Sun) 00:45
What's the sweet spot on 17-55 2.8 IS? Kimmer Canon EF and EF-S Lenses 1 6th of March 2008 (Thu) 00:09
17-35 L sweet spot? charly Canon EF and EF-S Lenses 9 18th of October 2007 (Thu) 23:53
Sweet Spot? chabooky386 Canon EF and EF-S Lenses 3 18th of August 2007 (Sat) 02:10
sweet spot coeng Canon EF and EF-S Lenses 8 21st of March 2006 (Tue) 13:38


All times are GMT -5. The time now is 11:41.


Powered by vBulletin® Version 3.6.12
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
This forum is not affiliated with Canon in any way and is run as a free user helpsite by Pekka Saarinen, Helsinki Finland. You will need to register in order to be able to post messages. Cookies are required for registering and posting. HTML in messages is not allowed, plain website addresses are automatically made active by the board.