Minimum Focusing Distance

aware · 18th of December 2005 (Sun)

Is this calculated from the end of the lens or the focal plane?

Austin

Dante King · 18th of December 2005 (Sun)

well, is it that critical that 7 inches or so would matter? I was taught it was from sensor.

aware · 18th of December 2005 (Sun)

Thanks for the info Dante. I am planning on photographing small birds from a permanent blind and I am having a friend set up a perch about a week before I arrive. Maybe in the grand scheme of things its not that important, but with small birds I want to be absolutely as close as possible and with a 400mm lens the difference between the end of the lens and the focal plane is about a foot.

Jman13 · 19th of December 2005 (Mon)

I'm pretty sure it's from the focal plane. My Tokina 12-24 has a minimum focus distance of 11 inches, by the specifications, but I get focus lock with the end of the lens about 7 inches from a subject....which confused me until I realized that it was about 11 inches from the focal plane.

Jon · 19th of December 2005 (Mon)

It is generally reported from the film/focal plane.

If you're that worried, carry a 12 mm extension tube along as well. Should move your infinity point to about 13 m. away and allow you to focus about 1 m. closer than stock closest focus.

DavidEB · 19th of December 2005 (Mon)

gee, I thought it was calculated from the lens' nodal point, but I could be wrong.

shiato storm · 19th of December 2005 (Mon)

surely theres a limit on the lens somewhere that it focus's to? I'd say set your hide to a little bit more than this minimum distance just to be save.

18th of December 2005 (Sun)	#1
aware Junior Member Join Date: Feb 2005 Location: Houston Posts: 10	Minimum Focusing Distance Is this calculated from the end of the lens or the focal plane? Austin

18th of December 2005 (Sun)	#2
Dante King "Cream of Corn" BurgerMeister Join Date: Jan 2005 Location: San Anselmo, California Posts: 9,134 IMAGE EDITING OK	Re: Minimum Focusing Distance well, is it that critical that 7 inches or so would matter? I was taught it was from sensor. __________________ Dante I am not an Lcoholic. Lcoholics go to meetings! Gear List

18th of December 2005 (Sun)	#3
aware Junior Member Join Date: Feb 2005 Location: Houston Posts: 10	Re: Minimum Focusing Distance Thanks for the info Dante. I am planning on photographing small birds from a permanent blind and I am having a friend set up a perch about a week before I arrive. Maybe in the grand scheme of things its not that important, but with small birds I want to be absolutely as close as possible and with a 400mm lens the difference between the end of the lens and the focal plane is about a foot.

19th of December 2005 (Mon)	#4
Jman13 Cream of the Crop Join Date: Dec 2005 Location: Columbus, OH Posts: 5,558	Re: Minimum Focusing Distance I'm pretty sure it's from the focal plane. My Tokina 12-24 has a minimum focus distance of 11 inches, by the specifications, but I get focus lock with the end of the lens about 7 inches from a subject....which confused me until I realized that it was about 11 inches from the focal plane. __________________ Jordan Steele - http://www.jordansteele.com Admiring Light - http://www.admiringlight.com

19th of December 2005 (Mon)	#5
Jon Moderator Cocker Spaniel Mod Join Date: Jun 2004 Location: Kensington, MD USA Posts: 65,142	Re: Minimum Focusing Distance It is generally reported from the film/focal plane. If you're that worried, carry a 12 mm extension tube along as well. Should move your infinity point to about 13 m. away and allow you to focus about 1 m. closer than stock closest focus. __________________ Jon ---------- EOS, Powershot and Domke - it doesn't get any better than this! T90 and stuff \| F-1n, New F-1, FTb and more stuff out on loan Cocker Spaniels Maryland and Virginia activities *DC Cherry Blossoms* Image Posting Rules and Image Posting FAQ Report SPAM, Don't Answer It! (link) PERSONAL MESSAGING REGARDING SELLING OR BUYING ITEMS WITH MEMBERS WHO HAVE NO POSTS IN FORUMS AND/OR WHO YOU DO NOT KNOW FROM FORUMS IS HEREBY DECLARED STRICTLY STUPID AND YOU WILL GET BURNED.

19th of December 2005 (Mon)	#6
DavidEB Goldmember Join Date: Feb 2005 Location: North Carolina Posts: 3,117 IMAGE EDITING OK	Re: Minimum Focusing Distance gee, I thought it was calculated from the lens' nodal point, but I could be wrong. __________________ David my stuff - my gallery - go Rats!

19th of December 2005 (Mon)	#7
shiato storm Senior Member Join Date: May 2005 Location: Bristol, UK Posts: 1,073	Re: Minimum Focusing Distance surely theres a limit on the lens somewhere that it focus's to? I'd say set your hide to a little bit more than this minimum distance just to be save. __________________

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