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04-23-2011, 09:29 AM   #1
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What does long throw mean?

I was looking at a thread about a lens on here and it said the lens had "long throw of the focus ring." It was about the tamron 90 being suitable for indoor sports.

What does long throw mean?

04-23-2011, 09:32 AM   #2
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What is focus throw? - Photography - Stack Exchange
04-23-2011, 09:40 AM   #3
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it means the number or degrees of focus rotation a lens does inorder to achieve a certain focus of a distance. for example a certain lens only take a 90 degree turn to achieve infinity focus and another lens needs to take 360 turn to achieve such distance. therefore the second lens has a longer focus throw.

having a short and a long focus throw have it's own pros and cons. short throw would enable you to focus much faster (crucial for fast moving subjects) while a long throw will enable you to focus more accurately and intricately in the smallest possible way (getting the best possible focused image).
04-23-2011, 09:52 AM   #4
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Long throw is desirable for manual focus.

04-23-2011, 11:06 AM   #5
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QuoteOriginally posted by manishved Quote
Long throw is desirable for manual focus.
In general yes, but over 630 degrees like on a M42 Vivitar 55/2.8 macro is a bit much when you have been shooting macro and after that want to do something at infinity
04-23-2011, 12:54 PM   #6
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QuoteOriginally posted by sterretje Quote
In general yes, but over 630 degrees like on a M42 Vivitar 55/2.8 macro is a bit much when you have been shooting macro and after that want to do something at infinity
The macro lenses that I use most often also turn the "wrong" way - the opposite direction of a Pentax lens. That adds to the problem. The Adaptall-2 Tamron 90/2.5 only turns about 270 degrees, similar to the K55/1.8, and it has a very nice feel, though it does go the "wrong" direction.
04-23-2011, 02:08 PM   #7
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QuoteOriginally posted by sterretje Quote
In general yes, but over 630 degrees like on a M42 Vivitar 55/2.8 macro is a bit much when you have been shooting macro and after that want to do something at infinity
All it takes is a little forethought. I don't have any issue with my tak 200f3.5 and 330 degree throw. You just set it before hand to the range you want
04-23-2011, 03:42 PM   #8
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QuoteOriginally posted by Pentaxor Quote
it means the number or degrees of focus rotation a lens does inorder to achieve a certain focus of a distance. for example a certain lens only take a 90 degree turn to achieve infinity focus and another lens needs to take 360 turn to achieve such distance. therefore the second lens has a longer focus throw.

having a short and a long focus throw have it's own pros and cons. short throw would enable you to focus much faster (crucial for fast moving subjects) while a long throw will enable you to focus more accurately and intricately in the smallest possible way (getting the best possible focused image).
Is the focus throw in the specs of most lenses?

04-23-2011, 05:55 PM   #9
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QuoteOriginally posted by justtakingpics Quote
Is the focus throw in the specs of most lenses?
they should be. having said that, macro lenses in general like the 90mm and other macros have long focus throws.
04-23-2011, 08:24 PM   #10
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QuoteOriginally posted by justtakingpics Quote
Is the focus throw in the specs of most lenses?
Usually you can get from the markings on the focus ring... for example, I have the vivitar 200mm f3.5 manual focus lens... from the closest marking of 8.5 feet to infinity takes more than 3/4 of the ring. The longer the throw, the more precision focus can be adjusted.
04-23-2011, 10:34 PM   #11
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QuoteOriginally posted by Lowell Goudge Quote
All it takes is a little forethought. I don't have any issue with my tak 200f3.5 and 330 degree throw. You just set it before hand to the range you want
Oh, I know. But it's the presetting from nearby to about 1 meter that always drives me up the wall; that already takes 540 degrees or so.

Maybe we must swap lenses
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