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Topic: This Is The Difference Between 200-400-800 ISO
Username: BA777
Posted 2002-07-10 21:54:07 and read 5922 times.

Guys,

Shot with a Fuji FinePix 4700Zoom, taken with the camera fixed on a tripod, camera in the same posistion each time, and shooting the same picture, but with different ISO selections.

First off is 200:



Next 400



And next 800 (why did I bother  Wink/being sarcastic)



As you can see, 200 is the clearest, then 400 then 800, 800 seems extremely grainy,which is why I never use it when shooting, always 200 and in the worst cases 400.

I haven't seen a post like this in these forums before, so I thought it might be valuable information for new photographers here on A.net and maybe some more experienced shooters.

Before Mr Sheldon, Mr Watt etc. have a go @ me as they would probably see this post "inappropriate"  Wink/being sarcastic I'd like the beginners to see what I mean.

BTW, these are DIGITAL shots, so film shots may not be the same!!

Regards.

BA777  Big thumbs up

Topic: RE: This Is The Difference Between 200-400-800 ISO
Username: Ckw
Posted 2002-07-10 23:35:20 and read 5871 times.

OK, an interesting comparison, but a few points people should note

1 - what you see is not grain, but noise - it looks similar but is quite different. In general though both get more noticeable as ISO increases.

2 - Although in general higher ISO means lesser quality, there is no direct correlation across cameras or films. For instance, Fuji Provia 400 has significantly less visible grain than Fuji Sensia 200. Different digital camera sensors also have different characteristics.

With digital images the "quality" of the noise is important - ideally it should be very random. Noise becomes much more noticable at low ISOs if it forms a regular pattern.

Cheers,

Colin

Topic: RE: This Is The Difference Between 200-400-800 ISO
Username: Airhead711
Posted 2002-07-11 00:39:19 and read 5846 times.

Thanks for the info.Very informative post and exactly the type of info I come to these boards to find.1 quick question though.What type of situation would require the ISO to be set to 400 or 800?I thought that low light situations required a higher ISO.But a couple of months ago at an airshow I took a photo of a B-1 Bomber doing a low pass with full burners at night.I had the ISO set to 400 and the photo was extremely grainy(or noisy...it's digital)But I am just a beginner so it's trial and error for me.So,can you explain a little about the situations that would require a higher ISO?

Thanks
Scott

Topic: RE: This Is The Difference Between 200-400-800 ISO
Username: PPGMD
Posted 2002-07-11 00:48:08 and read 5847 times.

Well I have used 400 and 800 myself on my CP995. I was sort of forced to, it was dark and there was alot of movement. The 400s weren't bad, but the 800s were horrible, but still came out pretty good IMO.

Though on my cameras when shooting the 200 f2.8, with Press 400 or Press 800 the grain isn't that bad IMO, and the shutter speeds are at exactly what I am looking for.

Topic: RE: This Is The Difference Between 200-400-800 ISO
Username: Ckw
Posted 2002-07-11 10:02:11 and read 5812 times.

Regardless of the ISO, grain or noise will be made worse by underexposure, so it is important to select an appropriate ISO for the conditions. I think, for example, instead of working at the margins of ISO 100 and risking a half stop underexposure, you would get better results with a correctly exposed shot at ISO 200.

Also, going back to my earlier comment, not all digital cameras are alike, and will have different noise characteristics depending on the sensor. Only experimentation and experience will tell you what's best for your camera - but since you're digital, at least you can experiment to your heart's content at no cost!

Cheers,

Colin

Topic: RE: This Is The Difference Between 200-400-800 ISO
Username: BartiniMan
Posted 2002-07-15 10:54:30 and read 5721 times.

Quick question, what does ISO stand for?

BartiniMan

Topic: RE: This Is The Difference Between 200-400-800 ISO
Username: Staffan
Posted 2002-07-15 10:57:41 and read 5727 times.

International Standard Organisation, or something like that.

Staffan

Topic: RE: This Is The Difference Between 200-400-800 ISO
Username: G-CIVP
Posted 2002-07-15 20:37:25 and read 5700 times.

"Fuji Provia 400 has significantly less visible grain than Fuji Sensia 200."

Mmm. Didn't know that - saw a photographer using that at LHR on a sunny day and thought he was mad! Are there any other (common) film anomalies?

Topic: RE: This Is The Difference Between 200-400-800 ISO
Username: Craigy
Posted 2002-07-15 22:46:19 and read 5689 times.

G-CIVP,
I don't think Provia is an 'anomaly'. It is branded as professional slide film, and costs about twice the price of Sensia. I use Provia 100 and when scanned at 4000 dpi, I cannot see any grain at all. I have just used my first Provia 400 and I am waiting to see the results. It is a luxury shooting 400 ISO, being able to use such small apertures and fast shutters even at 500mm.
Regards,
Craig.

Topic: RE: This Is The Difference Between 200-400-800 ISO
Username: G-CIVP
Posted 2002-07-18 21:03:42 and read 5639 times.

Thanks Craigy - the fog has lifted!


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