Which is better, higher ISO or faster lenses?


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ykkok

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Feb 24, 2004
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#1
Since most people is worried about the noise level in higher ISO, so, which do you think is of better quality:

1. f4.0 lens (slower) with ISO 1600 (17-85 IS)
2. f2.8 lens (faster) with ISO 800 (14-54)

* both should have equiv. EV, I suppose.
 

megaweb

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#2
Higher ISO => more noise

Faster lenses => more cost

so to decide which one is better is up to you :p
 

J

Jason H0

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#4
i recommend to you to use a higher ISO and then get Ninja or neat image to clean up the noisy in the photo. Better then to get a lens with a big whole cos it will cost a even bigger whole in your wallet.


ykkok said:
Since most people is worried about the noise level in higher ISO, so, which do you think is of better quality:

1. f4.0 lens (slower) with ISO 1600 (17-85 IS)
2. f2.8 lens (faster) with ISO 800 (14-54)

* both should have equiv. EV, I suppose.
 

STboy

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Apr 5, 2004
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#5
Having a faster lense means that you have luxury of going in different light situation without sarcificing the quality of the picture. If one is talking about of depth of field, a F2.8 will giving u a better out of focus background(shallower) than a F4. There will be times u need faster shutter speed and boosting ISO will give u grainy pictures, to capture motion for eg., that where a faster len come in.

Of course, having a faster lense also means that you pay more and carry more weight.

Juz a humble comparision...
 

user111

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Jul 27, 2004
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#7
u must look at the focal length range also
 

ykkok

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Feb 24, 2004
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#8
user111 said:
u must look at the focal length range also
For instance :

1. 300mm F4
2. 300mm F2.8

I find that some Olympus lenses gives you one stop more light comparatively to others.
 

user111

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Jul 27, 2004
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#9
for 300mm its still ok to get f4.

eg for 50mm 1.8 is enuff already vs 1.4
 

dkw

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Dec 10, 2003
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#10
Noise free high ISO is a back-saver! Can use slower, lighter lenses. Believe me, it matters!
 

ykkok

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Feb 24, 2004
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#11
Agree, it'll be great to have both.

I also notice that 4/3 lenses are generally smaller due to a smaller sensor behind, with equivalent f-stop and effective focal length.
 

AReality

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Jun 9, 2003
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#12
ykkok said:
For instance :

1. 300mm F4
2. 300mm F2.8

I find that some Olympus lenses gives you one stop more light comparatively to others.


Do note that the DOF is deeper on the Olympus system due to the smaller sensor. So a f/2.8 on the oly is comparatively the same as a f/5.6 on full-frame sensor, w.r.t DOF.


.
 

rainman

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Apr 4, 2004
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#13
ykkok said:
Since most people is worried about the noise level in higher ISO, so, which do you think is of better quality:

1. f4.0 lens (slower) with ISO 1600 (17-85 IS)
2. f2.8 lens (faster) with ISO 800 (14-54)

* both should have equiv. EV, I suppose.
faster lens u still can use higher ISO...what do u think? :)
 

ykkok

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Feb 24, 2004
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#14
AReality said:


Do note that the DOF is deeper on the Olympus system due to the smaller sensor. So a f/2.8 on the oly is comparatively the same as a f/5.6 on full-frame sensor, w.r.t DOF.


.
I agree that DOF is deeper on the Olympus system, but deeper DOF is sometime useful. For example shooting macro shots, I no longer need to struggle up to f22 to get sufficient DOF, usually f11-f16 will do. This give me plenty more light to work with.

But, I don't agree on how you phrase it - I think, it is misleading as people may think that the Olympus system is darker when u say f2.8 = f5.6. Rather, is actually because of the shorter focal length to achieve the same field of view (fov).

I would rather say, for the same fov, 300mm film = 150mm 4/3. That's the reason why, the latter has deeper DOF.
 

poh6702

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May 8, 2004
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#15
When you are under low light situation, I believe there isn't much UV ray that you want to filter, removing the UV filter will increase the light into the camera sensor. I have done the experiment before, by fixing the appeture, and let the camera auto set the speed, I found that by removing the UV filter, the speed increase and when put back the filter, it reduced.

If money no problem it is also good to have faster Lens, because you still can set to F4.0 with a F2.8 lens, but reversed is not true.
 

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