Pixalo Photography Community

Go Back   Pixalo Photography Community > Photography Forums > General photography questions and answers

General photography questions and answers: Discuss Focus issue...First of all my problem is i was taking photo's this weekend and i noticed the shots were slightly out ...
Welcome to the Pixalo Photography Community. As a Guest you are free to browse the site, but see what extras you get as a Member here.


Reply
 
LinkBack Thread Tools Display Modes
Old 17-09-2007, 19:09   #1 (permalink)
Quite Chatty
 
Join Date: May 2007
Posts: 52
Anto Modded is on a distinguished roadAnto Modded is on a distinguished road
User's Gallery
Focus issue

First of all my problem is i was taking photo's this weekend and i noticed the shots were slightly out of focus and have been the last 3 months of so. I am new to this so bear with me. I will put up a good pic and the settings used and then i will put up the bad one and settings also. I think the problem was thru fiddling around i selected ''automatic AF point selection'' where as i should of been using ''manual AF point selection and kept the seltion point in the center. Please feel free to comment be it good or bad as i struggle with the settings remembering things. All i really use the camera for is car trackdays and rallies. The main modes i use is ''tv'' at 200 and work down to freeze moving cars and leave motion blurr. And ''av'' at f/5 - f/5.6 for freezing subjects. I also use the sport mode to which i was told to stay away from and use the first to and adjust till i get it right.

First Pic (good one) http://images25.fotki.com/v904/photo...jpg?1183411726

Settings....EXIF Image Details

Make: Canon
Model: Canon EOS 350D Digital
Width: 650 pixels
Height: 433 pixels
Focal Length: 133.0mm
F-Number: F/6.3
Exposure Time: 0.0006 sec. 1/1600
ISO Speed: 400
Flash Mode: Off
Date: 2007-07-01 01:39:29


Second Pic (Bad One) http://images28.fotki.com/v1026/phot...jpg?1189961859

Settings.........EXIF Image Details

Make: Canon
Model: Canon EOS 350D Digital
Width: 650 pixels
Height: 433 pixels
F-Number: F/5.6
Exposure Time: 0.002 sec. 1/500
Metering Mode: Multi-segment
ISO Speed: 400
Flash Mode: Off
Date: 2007-09-16 00:18:23


Note the quality is reduced alot for uploading
__________________
msn: gt_anto@hotmail.com
www.D4Dphotos.com
Anto Modded is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 17-09-2007, 19:25   #2 (permalink)
Quite Chatty
 
Join Date: May 2007
Posts: 52
Anto Modded is on a distinguished roadAnto Modded is on a distinguished road
User's Gallery
Re: Focus issue

Forgot to mention its a canon 350d and a sigma 70 - 300 lense i usally have on
Anto Modded is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 17-09-2007, 19:29   #3 (permalink)
Loves the place
 
silkstone's Avatar
 
Join Date: Jan 2005
Location: Silkstone Common, Yorkshire, UK
Posts: 5,719
silkstone is a glorious beacon of lightsilkstone is a glorious beacon of light
silkstone is a glorious beacon of lightsilkstone is a glorious beacon of lightsilkstone is a glorious beacon of lightsilkstone is a glorious beacon of lightsilkstone is a glorious beacon of lightsilkstone is a glorious beacon of lightsilkstone is a glorious beacon of lightsilkstone is a glorious beacon of lightsilkstone is a glorious beacon of lightsilkstone is a glorious beacon of lightsilkstone is a glorious beacon of light

Image editing O.K.
User's Gallery
Users Camera Equipment List
Re: Focus issue

What focus mode are you using? For anything coming towards you or going away, you should use AI Servo which is supposed to have predictive AF so it guesses the distance the subject has moved between pressing the button and actually recording the image. (I gues you know that!) Or you can track the focus manually which, with a bit of practice, can work very well (and used to be the only option. ) I've never been entirely convinced about AF for moving subjects - sometimes it works and sometimes it doesn't.

Yes, use the centre AF point (assuming the part of the subject you want in focus is in the middle). I don't know why cameras have a zillion focus points when most people only use one.

Except.... be aware that using the centre point in One Shot mode, locking focus and then reframing so the subject is to one side will result in back-focusing. Whether that matters depends on the depth of field, but it catches people out.

It may be worth choosing a fixed point on the track, focusing on that manually and then pressing the button just a fraction before the car reaches that point.

Those with better ideas will be along shortly.....
silkstone is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 17-09-2007, 19:41   #4 (permalink)
Feet under the table
 
Summerleft's Avatar
 
Join Date: Jul 2007
Location: Derbyshire, UK
Posts: 1,786
Summerleft has a spectacular aura aboutSummerleft has a spectacular aura aboutSummerleft has a spectacular aura aboutSummerleft has a spectacular aura aboutSummerleft has a spectacular aura aboutSummerleft has a spectacular aura aboutSummerleft has a spectacular aura aboutSummerleft has a spectacular aura aboutSummerleft has a spectacular aura aboutSummerleft has a spectacular aura aboutSummerleft has a spectacular aura about

Image editing O.K.
User's Gallery
Users Camera Equipment List
Re: Focus issue

Quote:
Originally Posted by silkstone View Post

It may be worth choosing a fixed point on the track, focusing on that manually and then pressing the button just a fraction before the car reaches that point.

Those with better ideas will be along shortly.....

Thats a pretty good one, I dont know if its just me but doing it that way can be a tad disconcerting when taking the pics, but i have to say I only do it that way now and all the pics have come out well
Summerleft is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 17-09-2007, 20:14   #5 (permalink)
Pixalo Crew
 
Markulous's Avatar
 
Join Date: Jul 2006
Location: Peak District
Posts: 19,640
Markulous is a jewel in the rough
Markulous is a jewel in the roughMarkulous is a jewel in the roughMarkulous is a jewel in the roughMarkulous is a jewel in the roughMarkulous is a jewel in the roughMarkulous is a jewel in the rough

Image editing O.K.
User's Gallery
Users Camera Equipment List
Re: Focus issue

What I noticed immediately was the difference in shutter speed - and confirmed by the wheels of the vehicles. 1/500 it's not that tricky to get camera shake - especially if handholding. Are you using a tripod which would help?

I'm not dismissing the focus question - just that it's difficult to tell at that size where the focus point is!

Oh, and whilst I've not "done" vehicles, I'd manual focus on the subject as it moved, using a tripod to support the camera (or monopod if I was moving around a lot)
Markulous is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 17-09-2007, 20:43   #6 (permalink)
Quite Chatty
 
Join Date: May 2007
Posts: 52
Anto Modded is on a distinguished roadAnto Modded is on a distinguished road
User's Gallery
Re: Focus issue

-i am using AI Servo
-I dont use a tripod or monopod, only when im using the 170 - 500 lense which ive only used twice.
-The focusing manual is a great idea, but ive to take shots of a car and it only races 6 laps once in the whole day cause there is 9 different groups racing over the day. Therefore i need to be able to get as many good shots a possible in the short time i have. They lap at under a minute which is quick
-I usally just used tv and as i said worked from 200 - 250 down to work my motion blurr cause im not that experience with it. I usally opt for sports mode which i did on all those shots which that mini is in. I will change the af point to center. Also in tv mode i could shoot 1/1000 - 1/2000 if its good enough day but i was told that wont make a difference. I was told af point in center should work if i focus correctly on the car. Ive been reading books like mad and comparing settings. I just want to get the best out of the camera i can. Will take me years to get good at this but wont stop me trying to get results early.

Also thanks for all the comments people
Anto Modded is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 17-09-2007, 20:58   #7 (permalink)
Pixalo Crew
 
Markulous's Avatar
 
Join Date: Jul 2006
Location: Peak District
Posts: 19,640
Markulous is a jewel in the rough
Markulous is a jewel in the roughMarkulous is a jewel in the roughMarkulous is a jewel in the roughMarkulous is a jewel in the roughMarkulous is a jewel in the roughMarkulous is a jewel in the rough

Image editing O.K.
User's Gallery
Users Camera Equipment List
Re: Focus issue

You should be OK @ 1/500 but definitely would be OK @ 1/1000. 1/2000 would be overkill.

I'd still use a tripod - makes the whole thing easier as you rest up between shots and camera is balanced on tripod for smoother pans
Markulous is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 17-09-2007, 21:03   #8 (permalink)
Quite Chatty
 
Join Date: May 2007
Posts: 52
Anto Modded is on a distinguished roadAnto Modded is on a distinguished road
User's Gallery
Re: Focus issue

I will try a monopod at the weekend at the weekend and post up the results of some different settings i try. will try 1/1000 on tv, and f/5 on av and alter from there to see how it goes. but 1/1000 on tv might not work in a dull condition i was told. Person said f/5 or f/5.6 on av will give the same result
Anto Modded is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 17-09-2007, 21:17   #9 (permalink)
Quite Chatty
 
Join Date: May 2007
Posts: 52
Anto Modded is on a distinguished roadAnto Modded is on a distinguished road
User's Gallery
Re: Focus issue

Quote:
Originally Posted by silkstone View Post
Except.... be aware that using the centre point in One Shot mode, locking focus and then reframing so the subject is to one side will result in back-focusing. Whether that matters depends on the depth of field, but it catches people out.
I use continuous shot
Anto Modded is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Old 22-09-2007, 20:58   #10 (permalink)
Quite Chatty
 
Join Date: May 2007
Posts: 52
Anto Modded is on a distinguished roadAnto Modded is on a distinguished road
User's Gallery
Re: Focus issue

Ok i took 700 odd pics today and got good results at last. The pics are resized to make them quick to upload but arent edited at all. All were taken in ''tv'' mode. I used a iso of 400 and kept between 1/800 - 1/1600 and had to go to iso of 800 around 5.30 cause it got very dull. Used ''tv'' mode also for the motion blurring. i started at 250 and worked down to 160. i tried 125 but my hands arent too steady.





Anto Modded is offline  
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
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

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Copyright issue Steve400 General photography questions and answers 13 26-05-2007 11:33
Tips and Hints for a focus or soft focus problem. daveyuk Tutorials and Guides 13 16-03-2006 19:34
AF issue - is this normal? fingerz Cameras, Lenses and Accessories 40 28-01-2006 11:49


All times are GMT +1. The time now is 09:00.


vBulletin Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
ReviewPost & PhotoPost vB3 Enhanced, Copyright 2003-2014 All Enthusiast, Inc.
SEO by vBSEO 3.3.0
Copyright © 2006 - 2017 Pixalo.com

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196