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Does a faster lens need less light to make the same exposure?

Started 6 months ago | Discussions thread

Don Daugherty

Contributing Member • Posts: 621

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Re: Does a faster lens need less light to make the same exposure?

In reply to Dave Seeley, 6 months ago

"Faster" glass comes from the maximum aperture it can attain. If all of the elements of exposure are the same, then it will provide the same results. Advantage: You're 50L can open up to F/1.2, your 28-70 F/2.8 cannot.

D

Dave Seeley wrote:

I was thinking that it did... but

I had my 28-70 2.8L (Tv) at 1/200 iso 1000 metering at f3.5.

Swapped out my 50 1.2L at same (Tv) at 1/200 iso 1000 metering at f3.5.

Does that make sense? No advantage with the faster glass?

Thanks

Dave

--
pro photo-illustration
http://www.DaveSeeley.com/
current kit: 5DmkIII, 5DmkII, 17-35/2.8L, 24-105is/4.0L, 28-70/2.8L, 70-200is/2.8L, 100 macro/2.8L, 50/1.2L, 2x II extender, 8x550ex Speedlites, Phottix Odin Flash Triggers

Reply Reply with quote Complain

Post (hide subjects)	Posted by	When
Does a faster lens need less light to make the same exposure?	Dave Seeley	6 months ago
Think about it for a minute...	Forrest	6 months ago
Re: Does a faster lens need less light to make the same exposure?	Don Daugherty	6 months ago
Re: Does a faster lens need less light to make the same exposure?	Dave Seeley	6 months ago
Re: Does a faster lens need less light to make the same exposure?	nelsonal	6 months ago
Re: Does a faster lens need less light to make the same exposure?	BillsLIPhotos	6 months ago
All about exposure.	Great Bustard	6 months ago	1
Re: All about exposure.	Dave Seeley	6 months ago
Re: All about exposure.	Great Bustard	6 months ago
Re: All about exposure.	joger	6 months ago
Re: All about exposure.	meland	6 months ago
Re: All about exposure.	Steve Balcombe	6 months ago
Re: All about exposure.	joger	6 months ago
Re: All about exposure.	Steve Balcombe	6 months ago
Not 4%	Jan Madsen	6 months ago
Re: All about exposure.	Steve Balcombe	6 months ago
Re: All about exposure.	Jan Madsen	6 months ago
Re: Does a faster lens need less light to make the same exposure?	meland	6 months ago

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