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Photography Questions.
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Doorstop
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PostPosted: Tue Jan 13, 2009 3:33 pm    Post subject: Photography Questions.  Reply with quote Report this post to Mods

I couldn't see another thread on a generalised topic like this and I had a specific question to ask so here we go ...

I've recently acquired a half decent camera (Lumix DMC FZ18) and am in the process of tinkering with it with the general aim of finding out about aperture thingies, shutter settings, f-stops and all that interminable jargon but it's still all pretty murky to me.

I was taking photos last night and found that in certain conditions (indoors under incandescent light) my photos aren't as sharp as I'd like them to be .. they have lots of colour bleed, the focus isn't as defined as in full light and there's a lot of noise in the image.

For instance ...


I was just wondering if any kind UGer could enlighten me as to the proper settings to use to clean my images up or, alternatively, point me in the direction of a tutorial or three?
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Unh@ppyb@st@rd
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PostPosted: Tue Jan 13, 2009 4:33 pm    Post subject: Reply with quote Report this post to Mods

in low light condition you need to open lens right up f2.8 i think for lumix. great if subject static with just enough light. If subject moves slightly shot will be blurred so you increase Iso to freeze motion ( iso 800 or 1600 not uncommon in low light situations but this will also increase noise. A tripod will be need if subject is static or flash to illuminate subject. hope that gives u rough explanation.  
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Doorstop
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PostPosted: Tue Jan 13, 2009 5:37 pm    Post subject: Reply with quote Report this post to Mods

That's brilliant UB ... y'see, this is the stuff I'm desperate to learn.

Fantastic .. cheers again.  
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AlanM
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PostPosted: Tue Jan 13, 2009 5:48 pm    Post subject: Reply with quote Report this post to Mods

Your camera also has image stabilisation, which will help by allowing you to hand hold shots at much slower shutter speeds than without - it won't help with moving subjects though.
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LowLight
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PostPosted: Tue Jan 13, 2009 8:05 pm    Post subject: Reply with quote Report this post to Mods

Some pics and links.

Aperture


Things to remember about aperture.

The lower f/ number the larger the aperture. The lower the f/ number the more light will enter the lens.
Aperture size affects Depth Of Field





ISO

Things to remember about ISO - This all just depends on your available light

ISO 100/200 is fine for sunny days but will require a slower shutter speed and/or larger aperture f/1.8 f/2.8 in darker situations etc.

ISO 400/800/1600 will allow for a faster shutter speed but will result in more noise being generated.
ISO noise



Shutter Speed

Things to remember about shutter speed.

A slow shutter speed 30 seconds to 1/60 sec will result in a blurry image, milky water, trails from moving cars etc.
A faster shutter speed 1/200 sec to 1/4000 sec will freeze the subject. Good for sports or wildlife photography.



That's just a short explanation of exposure and doesn't take into account the use of a tripod (get one) a flash or conditions that are out of your control

So:

Larger aperture (smaller number) - More light in, affects Depth Of Field (read up on that a wee bit and practice with it).

ISO Speed - Lower number = less noise but requires slower shutter speed depending on lighting conditions.

Shutter Speed - Low shutter speed will blur anything moving or create a nice smooth water look etc.

Faster shutter speed will freeze any action, ideal for fast paced sport or wildlife.

Just remember these aren't rules just some guidelines. Get out and get shooting and don't get too caught up in all the technical stuff.

I'll also revise this post later because it's a bit rushed.

NEXT TIME

DEPTH OF FIELD
RAW
WHITE BALANCE
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Last edited by LowLight on Tue Jan 13, 2009 11:03 pm; edited 2 times in total
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LowLight
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PostPosted: Tue Jan 13, 2009 8:10 pm    Post subject: Reply with quote Report this post to Mods

Oh and if you go to my flick page or look at my images posted here you'll notice the settings are around the border.

I'm not saying they're all perfect settings (no such thing) but they might show you how a large aperture will create a shallower depth of field (blurry background) or how a fast shutter speed will capture a bird in flight or freeze people in mid step walking down the street.

Just get out shooting and get the results posted.
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PostPosted: Tue Jan 13, 2009 9:47 pm    Post subject: Re: Photography Questions. Reply with quote Report this post to Mods

Doorstop wrote:



Poor buggers, they just know that they are going to have to look at the results as well.
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AlanM
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PostPosted: Tue Jan 13, 2009 10:11 pm    Post subject: Reply with quote Report this post to Mods

LowLight wrote:
ISO Speed - Lower number = less noise but requires faster shutter speed depending on lighting conditions.


Lower ISO needs a slower shutter speed not a faster speed.
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LowLight
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PostPosted: Tue Jan 13, 2009 11:04 pm    Post subject: Reply with quote Report this post to Mods

Fixed.
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PostPosted: Wed Jan 14, 2009 12:48 pm    Post subject: Reply with quote Report this post to Mods

Very helpful Gentlemen ... between this and 'The Other Place' I have learned loads over last night and this morning.

Cheers muchly ... and rest assured I will be back bothering you again ... soon.    


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