canon eos photography question: light sensitivity lenses - GoFuckYourself.com

mrthumbs · 12-16-2005, 01:20 PM

Are there lenses availabe for the EOS that are more sensitive to light?

Or is it all about ISO shuttertime and the CCD?

latinasojourn · 12-16-2005, 02:21 PM

the lens just "gathers" the light, with "fast" lenses (bigger lens openings) have more ability to gather.

it is just physics. the smaller the f/stop the greater the light gathering ability.

and the faster the lens, the heavier, and more expensive.

f/5.6 lets in twice the light as f/8, which lets in twice the light as f/11, etc.

pornguy · 12-16-2005, 02:24 PM

NIce to know.

Damn. I just learned something on GFY

26MLR · 12-16-2005, 02:25 PM

Quote:

Originally Posted by latinasojourn

the lens just "gathers" the light, with "fast" lenses (bigger lens openings) have more ability to gather.

it is just physics. the smaller the f/stop the greater the light gathering ability.

and the faster the lens, the heavier, and more expensive.

f/5.6 lets in twice the light as f/8, which lets in twice the light as f/11, etc.

Not entirely true. the quality of the lens has something to do with it as well... not just the size.

AlienQ - BANNED FOR LIFE · 12-16-2005, 02:27 PM

High ISO speed very bad for Lowlight.

Finding the compromise is the tough part if opting for low light settings.

I just did a shoot in low light settings.

Its a tough area of photography.

End up with grainer pictures or a blury model if she can not sit still during exposure time.

Thats my Leymans answer.

latinasojourn · 12-16-2005, 02:46 PM

Quote:

Originally Posted by 26MLR

Not entirely true. the quality of the lens has something to do with it as well... not just the size.

the optical quality of the lens is not what effects it's light gathering ability, the size of the lens diaphragm is.

f/stop is a light gathering measurement standard, and is irrespective of optical quality, lens manufacturer, or camera format.

it is rudimentary physics.

it is true that faster lenses generally have better lens quality because the marketplace demands it (and they are much more expensive) but a high optical quality lens set at f/8 lets in exactly the same amount of light (on average discounting vignetting) as a low optical quality lens set at f/8.

to answer the original poster's question---yes, buy a fast canon lens, such as
50mm f/1.4 if you want to shoot in low light, with lowest iso.

but slow shutterspeed and tripod could accomplish same mission.

woj · 12-16-2005, 02:50 PM

if you want to capture more light get a "fast lens" lower f number = more light captured...
f/2.0 captures more light than f/3.5

26MLR · 12-16-2005, 02:54 PM

Quote:

Originally Posted by latinasojourn

the optical quality of the lens is not what effects it's light gathering ability, the size of the lens diaphragm is.

f/stop is a light gathering measurement standard, and is irrespective of optical quality, lens manufacturer, or camera format.

it is rudimentary physics.

it is true that faster lenses generally have better lens quality because the marketplace demands it (and they are much more expensive) but a high optical quality lens set at f/8 lets in exactly the same amount of light (on average discounting vignetting) as a low optical quality lens set at f/8.

to answer the original poster's question---yes, buy a fast canon lens, such as
50mm f/1.4 if you want to shoot in low light, with lowest iso.

but slow shutterspeed and tripod could accomplish same mission.

OK, you got me.

Tricksy · 12-16-2005, 03:03 PM

I bought a very cheap lens (~$100) for my Canon EOS 20D. It's Canon EF 50mm f/1.8
Works really good in dim light. Canon EF 50mm f/1.4 is even better but cost around $350.

SilentKnight · 12-16-2005, 03:41 PM

Quote:

Originally Posted by AlienQ

High ISO speed very bad for Lowlight.

Finding the compromise is the tough part if opting for low light settings.

I just did a shoot in low light settings.

Its a tough area of photography.

End up with grainer pictures or a blury model if she can not sit still during exposure time.

Thats my Leymans answer.

As one who does a LOT of low and available light photography, motion blur is the constant enemy. I rarely change the iso to compensate (mostly I shoot at 80iso) - but rely on longer exposures, a sturdy tripod, usually a cable release...and hopefully a model who can 'strike a pose' and hold it fairly steady.

mrthumbs · 12-16-2005, 03:44 PM

Quote:

Originally Posted by latinasojourn

the optical quality of the lens is not what effects it's light gathering ability, the size of the lens diaphragm is.

f/stop is a light gathering measurement standard, and is irrespective of optical quality, lens manufacturer, or camera format.

it is rudimentary physics.

it is true that faster lenses generally have better lens quality because the marketplace demands it (and they are much more expensive) but a high optical quality lens set at f/8 lets in exactly the same amount of light (on average discounting vignetting) as a low optical quality lens set at f/8.

to answer the original poster's question---yes, buy a fast canon lens, such as
50mm f/1.4 if you want to shoot in low light, with lowest iso.

but slow shutterspeed and tripod could accomplish same mission.

Thank you.. that makes a lot of sense.

12-16-2005, 01:20 PM	#1
mrthumbs salad tossing sig guy Join Date: Apr 2002 Location: mrthumbs*gmail.com Posts: 11,702	canon eos photography question: light sensitivity lenses Are there lenses availabe for the EOS that are more sensitive to light? Or is it all about ISO shuttertime and the CCD?

12-16-2005, 02:24 PM	#3
pornguy Too lazy to set a custom title Industry Role: Join Date: Mar 2003 Location: Homeless Posts: 62,911	NIce to know. Damn. I just learned something on GFY __________________ PornGuy skype me pornguy_epic AmateurDough The Hottes Shemales online! TChicks.com \| Angeles Cid \| Mariana Cordoba \| MAILERS WELCOME!

12-16-2005, 02:27 PM	#5
AlienQ - BANNED FOR LIFE best designer on GFY Join Date: Mar 2003 Location: IALIEN.COM - High Definition Video and Photographic Productions -ICQ 78943384 Posts: 30,307	High ISO speed very bad for Lowlight. Finding the compromise is the tough part if opting for low light settings. I just did a shoot in low light settings. Its a tough area of photography. End up with grainer pictures or a blury model if she can not sit still during exposure time. Thats my Leymans answer. __________________ NAKED HOSTING FTW!11 I'm On The INSANE PLAN $9.95/mo! \| The Alien Blog Adult News Worth Reading Updated Daily \| Content For Sale! 641 PICS 216 MINUTES OF VIDEO $350.00 \|ICQ: 78943384 \| Last edited by AlienQ - BANNED FOR LIFE; 12-16-2005 at 02:28 PM..

12-16-2005, 02:50 PM	#7
woj <&(©¿©)&> Industry Role: Join Date: Jul 2002 Location: Chicago Posts: 47,882	if you want to capture more light get a "fast lens" lower f number = more light captured... f/2.0 captures more light than f/3.5 __________________ Custom Software Development, email: woj#at#wojfun#.#com to discuss details or skype: wojl2000 or gchat: wojfun or telegram: wojl2000 Affiliate program tools: Hosted Galleries Manager Banner Manager Video Manager Wordpress Affiliate Plugin Pic/Movie of the Day Fansign Generator Zip Manager

12-16-2005, 03:03 PM	#9
Tricksy Confirmed User Join Date: Aug 2004 Location: USA Posts: 2,601	I bought a very cheap lens (~$100) for my Canon EOS 20D. It's Canon EF 50mm f/1.8 Works really good in dim light. Canon EF 50mm f/1.4 is even better but cost around $350. __________________ Real-Bucks.com - Real Bucks for Real Webmasters.

12-16-2005, 02:21 PM	#2
latinasojourn Confirmed User Join Date: Oct 2003 Posts: 3,191	the lens just "gathers" the light, with "fast" lenses (bigger lens openings) have more ability to gather. it is just physics. the smaller the f/stop the greater the light gathering ability. and the faster the lens, the heavier, and more expensive. f/5.6 lets in twice the light as f/8, which lets in twice the light as f/11, etc.