ISO for daylight shooting wide open F1.4

pyra_ohms · 08-03-2010, 01:16 PM

I just got my new SMC-A 1.4 and cant wait to test it!

What ISO-speed should i use to be able to shoot wide open in daylight? Is this possible? Filters?

Cheers

alohadave · 08-03-2010, 01:23 PM

Try it out. You can shoot at whatever ISO you want.

Lower is generally better for daytime, especially if you are going to be shooting near f/1.4.

**Lowell Goudge** · 08-03-2010, 02:38 PM

you might find wide open there is too much light without a ND filter or polarizer.

go out and play a little, then think about filters if there is too much light.

KxBlaze · 08-03-2010, 02:45 PM

Definitely as low as possible (100 maybe). But even then depending how much sun light there is you might have to shoot at a very fast shutter speed.

Wheatfield · 08-03-2010, 05:39 PM

Lowest ISO you can.
This is a pretty good rule of thumb actually.
Shoot the lowest ISO you can use to get what you want in any situation.

jetstar · 08-03-2010, 07:13 PM

I think shooting wide open you will definitely need to shoot at lowest ISO possible, even still without a ND filter you will probably get some overexposed photos unless you can shoot at over 1/4000th sec.

JeffJS · 08-03-2010, 08:22 PM

100.

ManhattanProject · 08-03-2010, 08:47 PM

Originally posted by JeffJS

100.

Yea... I always use 100 outside from dawn to dusk.

But to the OP, every situation varies. This is really a stupid question, if there's such a thing.

Ira · 08-04-2010, 05:53 AM

Originally posted by ManhattanProject

Yea... I always use 100 outside from dawn to dusk.

I'm the exact same way, unless it gets real overcast and I have to go to 200. But people have posted here that it's not a true 100. And remember that you have to have Expanded Sensitivity On and Highlight Correction Off to have 100 available.

BTW:

Does the OP realize that on the K-x (and I assume other Pentax DSLRs), your range of available ISOs is linked to your preferences for Ev (exposure compensation)? In other words, if you have your Ev settings at full stops, you will only be able to select ISO 100, 200, 400, etc. But if you have it set to 1/3rd of a stop, you'll have available like 100, 135, 175, etc.

pyra_ohms · 08-04-2010, 06:15 AM

Originally posted by ManhattanProject

Yea... I always use 100 outside from dawn to dusk.

But to the OP, every situation varies. This is really a stupid question, if there's such a thing.

I dont agree. I want to know which ISO-speed gives me opportunity to use F1.4 in full sun with my camera shutter speed ranging from 4s-1/2000s.

Is there film under ISO100 (i.e. 32 or 64) on the market?

Maybe i have to use a ND filter though cause of the fast shutter speed required.

Wheatfield · 08-04-2010, 06:53 AM

Originally posted by pyra_ohms

I dont agree. I want to know which ISO-speed gives me opportunity to use F1.4 in full sun with my camera shutter speed ranging from 4s-1/2000s.

Is there film under ISO100 (i.e. 32 or 64) on the market?

Maybe i have to use a ND filter though cause of the fast shutter speed required.

Why don't you go out and take some pictures, find out what you need to do what you want and then work towards acquiring it?
If you want to use an f/1.4 aperture in full sun with a 4 second exposure, I suspect you are in for some difficulty, but I'll leave you to figure out why on your own, as the learning experience will be good for you.

oliver939 · 08-04-2010, 06:56 AM

you should have reminded everybody her eyou shoot with film camera

(also it obvious in your gear list, most people here use DSLR).

Maybe 64 exists. IF not, depending the fastest speed of your camera shutter, you may have to put a ND filter.

Ira · 08-04-2010, 07:32 AM

Oooops:

Film.

ManhattanProject · 08-04-2010, 08:32 AM

Film changes everything.

John Poirier · 08-04-2010, 11:09 AM

Originally posted by Ira

Oooops:

Film.

Being too lazy to unzip a camera bag and walk outside with a 1.4 on one of my film bodies, I looked at my Sekonic L398. At the meter's normal indication for bright sunlight, at ISO 100 an aperture of 1.4 would require a shutter speed of 1/16000 (Off the scale for the meter, but I did a bit of mental arithmetic.)

Testing indoors or waiting for dimmer natural light would be cheaper and simpler than using an ND filter, and would probably give a more accurate indication of lens performance. Sticking a filter on a lens at 1.4 is probably not a good thing in terms of sharpness or contrast.

08-03-2010, 01:16 PM	#1
pyra_ohms Forum Member Join Date: Apr 2010 Location: Malmö Photos: Albums Posts: 67	ISO for daylight shooting wide open F1.4 I just got my new SMC-A 1.4 and cant wait to test it! What ISO-speed should i use to be able to shoot wide open in daylight? Is this possible? Filters? Cheers

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08-03-2010, 01:23 PM	#2
alohadave Veteran Member Join Date: Jan 2008 Location: Quincy, MA Photos: Gallery \| Albums Posts: 2,024	Try it out. You can shoot at whatever ISO you want. Lower is generally better for daytime, especially if you are going to be shooting near f/1.4.

08-03-2010, 02:38 PM	#3
Lowell Goudge Site Supporter Join Date: Jan 2007 Location: Toronto Photos: Gallery \| Albums Posts: 17,891	you might find wide open there is too much light without a ND filter or polarizer. go out and play a little, then think about filters if there is too much light.

08-03-2010, 02:45 PM	#4
KxBlaze Veteran Member Join Date: Feb 2010 Location: California Photos: Gallery Posts: 1,602	Definitely as low as possible (100 maybe). But even then depending how much sun light there is you might have to shoot at a very fast shutter speed.

08-03-2010, 05:39 PM	#5
Wheatfield Moderator Join Date: Apr 2008 Location: The wheatfields of Canada Posts: 15,986	Lowest ISO you can. This is a pretty good rule of thumb actually. Shoot the lowest ISO you can use to get what you want in any situation.

08-03-2010, 07:13 PM	#6
jetstar Inactive Account Join Date: Jan 2010 Posts: 2	I think shooting wide open you will definitely need to shoot at lowest ISO possible, even still without a ND filter you will probably get some overexposed photos unless you can shoot at over 1/4000th sec.

08-03-2010, 08:22 PM	#7
JeffJS Inactive Account Join Date: Aug 2008 Location: Michigan, USA Photos: Gallery \| Albums Posts: 7,484	100.

08-03-2010, 08:47 PM	#8
ManhattanProject Senior Member Join Date: Apr 2010 Location: Midwest Photos: Gallery Posts: 221	Originally posted by JeffJS 100. Yea... I always use 100 outside from dawn to dusk. But to the OP, every situation varies. This is really a stupid question, if there's such a thing.

08-04-2010, 05:53 AM	#9
Ira Inactive Account Join Date: Mar 2009 Location: Coral Springs, FL Photos: Gallery \| Albums Posts: 5,216	Originally posted by ManhattanProject Yea... I always use 100 outside from dawn to dusk. I'm the exact same way, unless it gets real overcast and I have to go to 200. But people have posted here that it's not a true 100. And remember that you have to have Expanded Sensitivity On and Highlight Correction Off to have 100 available. BTW: Does the OP realize that on the K-x (and I assume other Pentax DSLRs), your range of available ISOs is linked to your preferences for Ev (exposure compensation)? In other words, if you have your Ev settings at full stops, you will only be able to select ISO 100, 200, 400, etc. But if you have it set to 1/3rd of a stop, you'll have available like 100, 135, 175, etc.

08-04-2010, 06:15 AM	#10
pyra_ohms Forum Member Join Date: Apr 2010 Location: Malmö Photos: Albums Posts: 67 Original Poster	Originally posted by ManhattanProject Yea... I always use 100 outside from dawn to dusk. But to the OP, every situation varies. This is really a stupid question, if there's such a thing. I dont agree. I want to know which ISO-speed gives me opportunity to use F1.4 in full sun with my camera shutter speed ranging from 4s-1/2000s. Is there film under ISO100 (i.e. 32 or 64) on the market? Maybe i have to use a ND filter though cause of the fast shutter speed required.

08-04-2010, 06:53 AM	#11
Wheatfield Moderator Join Date: Apr 2008 Location: The wheatfields of Canada Posts: 15,986	Originally posted by pyra_ohms I dont agree. I want to know which ISO-speed gives me opportunity to use F1.4 in full sun with my camera shutter speed ranging from 4s-1/2000s. Is there film under ISO100 (i.e. 32 or 64) on the market? Maybe i have to use a ND filter though cause of the fast shutter speed required. Why don't you go out and take some pictures, find out what you need to do what you want and then work towards acquiring it? If you want to use an f/1.4 aperture in full sun with a 4 second exposure, I suspect you are in for some difficulty, but I'll leave you to figure out why on your own, as the learning experience will be good for you.

08-04-2010, 06:56 AM	#12
oliver939 Senior Member Join Date: Dec 2009 Location: europe Posts: 156	you should have reminded everybody her eyou shoot with film camera (also it obvious in your gear list, most people here use DSLR). Maybe 64 exists. IF not, depending the fastest speed of your camera shutter, you may have to put a ND filter.

08-04-2010, 07:32 AM	#13
Ira Inactive Account Join Date: Mar 2009 Location: Coral Springs, FL Photos: Gallery \| Albums Posts: 5,216	Oooops: Film.

08-04-2010, 08:32 AM	#14
ManhattanProject Senior Member Join Date: Apr 2010 Location: Midwest Photos: Gallery Posts: 221	Film changes everything.

08-04-2010, 11:09 AM	#15
John Poirier Veteran Member Join Date: Dec 2006 Location: Gabriola Island Posts: 619	Originally posted by Ira Oooops: Film. Being too lazy to unzip a camera bag and walk outside with a 1.4 on one of my film bodies, I looked at my Sekonic L398. At the meter's normal indication for bright sunlight, at ISO 100 an aperture of 1.4 would require a shutter speed of 1/16000 (Off the scale for the meter, but I did a bit of mental arithmetic.) Testing indoors or waiting for dimmer natural light would be cheaper and simpler than using an ND filter, and would probably give a more accurate indication of lens performance. Sticking a filter on a lens at 1.4 is probably not a good thing in terms of sharpness or contrast.