from earthy Posted December 5, 2003 Share Posted December 5, 2003 Im very slow in manual focusing do i really need to focus precisely when Im at f8 or f11? I mean shud my subject 100% focus or is it ok my subject is only 80%focus at f8-f11 i ask this question because when i push the depth of field preview at f8-f11 my subject becomes sharp when i release the depth of field preview button my subject are not 100% sharp. So i can still get sharp pix when im at f8-f11 when my subject is not 100% focus shown on my viewfinder my lens is 50mm 1.4 Link to comment Share on other sites More sharing options...
el_fang Posted December 5, 2003 Share Posted December 5, 2003 Personally I think it's ok at 76% focus. Link to comment Share on other sites More sharing options...
spencer_hahn Posted December 5, 2003 Share Posted December 5, 2003 Don't you usually ramble in the Canon forum? If it's in focus when you press the DoF preview button, it'll be in focus. What's your question. Link to comment Share on other sites More sharing options...
leslie_cheung Posted December 5, 2003 Share Posted December 5, 2003 i suggest you get focus as much as you can as there is only one plane of precise focus. also it depends on the subject as well. if you are doing street with a 28mm, it is easier to let go than say a portrait shoot with a tele lens focus on the eye Link to comment Share on other sites More sharing options...
dominic_. Posted December 5, 2003 Share Posted December 5, 2003 It might not be very noticible on 4x6 prints, but once you start enlarging it usually becomes clear that poor focus has been used. I would try and get 90%+ if I were you. Best wishes, --Dominic Link to comment Share on other sites More sharing options...
todd peach seattle, washi Posted December 5, 2003 Share Posted December 5, 2003 Not to sound glib, but try focussing faster. "Creeping" to the best focus can be frustrating, as you have difficulty telling when it's "good enough" or "best". I have more success by rapidly sawing the focus ring to "past good", then "back". Link to comment Share on other sites More sharing options...
mark_jordan3 Posted December 5, 2003 Share Posted December 5, 2003 I guess it's an approach if the difference meant losing an opportunity for the shot. What do you feel contributes to your slow focusing? I would try to identify those issues and see what can be addressed. A few things that come to mind:<br> - Focusing screens, are they interchangebable on your particular body...if so, try a different screen<br> - Diopters, if your an eyeglass wearer<br> - Switching to faster lenses (2.8 or faster) to give you a brighter focusing image to work with<br> Link to comment Share on other sites More sharing options...
jake_tauber Posted December 5, 2003 Share Posted December 5, 2003 I suggest you learn some photography basics. You can preset your focus once you understand how aperture effects it. Read this: http://www.dpreview.com/learn/Glossary/Optical/Depth_of_field_01.htm Link to comment Share on other sites More sharing options...
shawn_rahman Posted December 5, 2003 Share Posted December 5, 2003 When is everyone going to learn that that "From Earth" is not serious about learning about anything? Link to comment Share on other sites More sharing options...
klix Posted December 5, 2003 Share Posted December 5, 2003 Learn the basics... there are plenty of references out there. With a 50mm/1.4 lens and a subject at 10 ft...., at 1.4 your DOF is <1 ft; at f11, you've got about 7.5 ft of total DOF to work with. At least that's how it works with Nikons -- Canon might have its own voodoo so you REALLY SHOULD double check with your buddies at the Canon forum -- yes, I really mean that!!! Link to comment Share on other sites More sharing options...
david_h._hartman Posted December 5, 2003 Share Posted December 5, 2003 <em>"When is everyone going to learn that that "From Earth" is not serious about learning about anything?" --Shawn Rahman<br> </em><br> I think Shawn is on to something here, have a look...<br> <br> <a href="http://www.photo.net/shared/community-member-all?proc_name=bboard&user_id=752433" target="_new"><u>Forum Postings by From Earth</u></a><br> <br> Cheers,<br> <br> Dave. Link to comment Share on other sites More sharing options...
Robert_Lai Posted December 6, 2003 Share Posted December 6, 2003 He (she) can't go to the Canon forum because all his (her) Canon lenses have fungus in them. I suggested Leica to him (her) a long time ago.<p>To be fair to "from earth", I am also having problems focusing my 50mm f/1.4. The problem is very shallow depth of field. The problem seems less with the 35mm f/1.4, possibly because of the greater DOF available at that focal length. In trying to get the subject's eyes focused, I end up getting the shirt focused instead. I'm using the 6x finder for now until I get the hang of it.<P>Albert Smith seems to have the best ability to get these lenses in focus wide open, as evidenced by pictures of his mother. Perhaps he can give some advice. Link to comment Share on other sites More sharing options...
todd peach seattle, washi Posted December 7, 2003 Share Posted December 7, 2003 Are you using an E screen, Robert? As opposed to something with a central focus aid? With fast glass/narrow DOF, you can get a focus error from 're-composing'. I'm getting my share of 'misses' with an 85/1.4 wide open at portrait ranges. I attribute some of that to slight subject motion (candids). I have yet to try the 'move with them' technique, but I fear that won't work with the narrow DOF at this range. Link to comment Share on other sites More sharing options...
Carl Stone Posted December 7, 2003 Share Posted December 7, 2003 This may not offer much help here, but this is an area where AF really helps. Link to comment Share on other sites More sharing options...
rockne_roll1 Posted December 11, 2003 Share Posted December 11, 2003 Mabey s/he has fungus in her brain. (Just Kidding) Link to comment Share on other sites More sharing options...
charles_twiss1 Posted December 11, 2003 Share Posted December 11, 2003 Depends on how far away you are from the subject. F8 will not give as much depth of field close up as it will with a lens focused on infinity. Focul length also plays a part. If you intend to spend the rest of your life on head and shoulders portarits from 10 feet away...it'll be ok. Otherwise, learn to focus or go autofocus...just in case you need to open up a stop or two one day. Link to comment Share on other sites More sharing options...
larry_miller5 Posted June 3, 2005 Share Posted June 3, 2005 "Slow Focusing", that's a new one! Link to comment Share on other sites More sharing options...
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