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What is an F stop?

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Thread started 18 Sep 2006 (Monday) 06:40   
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bdj3
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I'm new to the jargon; someone asked me to check my f stop over the weekend. I had no idea what that was.Help!My next question is for doing close up portrait model photography what lense would you recommend? Right now I have a rebel xt 18-55mm lense. Help! thanks!

Post #1, Sep 18, 2006 06:40:44


http://www.flickr.com/​photos/lisapraul/external link
40d/kit lens/ rebel xt 6.3mp/430 ex flash/18-55 kit lens/50mm 1.8/55-200mm/ 1gb/1gb flash cards/ 2gb flash card/ some filters....polarizer..​.wishing for more!

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Pete
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"F-stop" is the same as "aperture setting".

Post #2, Sep 18, 2006 07:06:09


Pete
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Curtis ­ N
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Here's a wikipedia entry that should help you out.
http://en.wikipedia.or​g/wiki/F-numberexternal link

Post #3, Sep 18, 2006 08:52:34


"If you're not having fun, your pictures will reflect that." - Joe McNally
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SimonG
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Wouldn't a post like this be better suited to Talk About Photography? Surely you do not need a pro's input on this one eh?

Post #4, Sep 18, 2006 17:24:48 as a reply to Curtis N's post 8 hours earlier.


-- Michael (a.k.a. SimonG)
EOS 5D | 17-40 f/4L | 24-105 f/4L | 40 f/2.8 | 50 f/1.4 | 85 f/1.4 | 430EX | Zenfolioexternal link

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tim
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Do a class in your area, it's easier than reading about it. Or read then experiement.

Post #5, Sep 19, 2006 19:32:45


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nitekatt2006
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I agree, we all started at the bottom. look into a photography 101 class or adult education. I imagine if you didn't know what an F stop was, there are many other basics you want to learn as well. It's nothing to be ashamed of. A friend of mine never took his digi cam off automatic for over a year! he was missing out on a lot of fun and experiments katt

Post #6, Sep 19, 2006 21:19:46


Canon 10D and 30D. Tokina 80-200mm Pro 2.8 zoom, Sigma 50mm 2.8 macro, Sigma 10-20mm f4-5.6, Canon 28-135mm f3.5-5.6 IS, 2 AB 800

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colinmcnamara
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Your F stop is one of the three major values that you can adjust in your camera. (F stop, Shutter Speed, ISO).
If you are just starting out I would recomend going through Canon's free tutorial for entry level DSLR users.
http://web.canon.jp/Im​aging/enjoydslr/index.​htmlexternal link

--Colin

Post #7, Sep 19, 2006 22:54:12 as a reply to nitekatt2006's post 1 hour earlier.


Cameras & Lenses
Canon
20D

Canon EF 24-70 2.8L USM
Canon EF 50mm 1.8 ll
Canon EF-S 18-55
Sony DSC-P9
Lighting & Studio Equipment
Canon
Speedlight 580EX Flash
Stofen OmniBounce
Sunpack 383 Auto Flash
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TeeJay
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Curtis N wrote in post #2002301external link
Here's a wikipedia entry that should help you out.
http://en.wikipedia.or​g/wiki/F-numberexternal link

If you didn't know before, you'll be confused as hell after reading that!:lol: :lol:

Post #8, Sep 20, 2006 10:54:01


1DsMkIII | 1DMkIIN | 70-200 f/2.8L IS | 24-70 f/2.8L | 24-105 f/4L IS | 17-40 f/4L | 50 f/1.2L | WFT-E1 & E2 Transmitters - Click Here for setup advice | CP-E4 Battery Pack x 2 | ST-E2 | 580EX | 550EX | 430EXII | 420EX | Tripod + monopod | Bowens Esprit Gemini 500W/s heads & Travel-Pak | All this gear - and still no idea :confused:

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landwish
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http://digital-photography-school.com/blog/apertu​re/external link

I'm just starting to figure out what I'm doing and the link above helped a lot. A cheap lens to get you started with portraits would be the 50mm 1.8


http://www.amazon.com ...8-5217730?ie=UTF8&s=phot​oexternal link

There are better lenses out there, but this is the one I decided to start with :)

Post #9, Sep 20, 2006 12:42:34


http://landwish.devian​tart.com/external link

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symes
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as others have said it is the aperature value. in laymens terms it means how much you want in focus from the actual focus point - at f4 you will have less in focus around your focus point than at f8 and so one as the fnumber increases...

TeeJay wrote in post #2012341external link
If you didn't know before, you'll be confused as hell after reading that!:lol: :lol:

hahahhahhha

Post #10, Sep 22, 2006 16:16:27


Symes
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Bill ­ Roberts
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Lot's of good advice above, but I have to disagree somewhat with symes on this. Although he's quite right in that the aperture does indeed radically effect the depth of field and what appears to be acceptably sharp in front of and behind the actual point of focus, it's really to do with the amount of light that the lens is allowing in. A small f number (say f/2.8) will let in a lot more light than a larger number (say f/16). Even that's confusing in that the smaller number is actually a larger aperture :confused:

Don't worry about it though, read up on it and try out various settings on the camera. After a while it will all start to make sense.

Post #11, Sep 22, 2006 17:29:15


BiLL

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evilmichael
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[QUOTE=colinmcnamara;2​010667]Your F stop is one of the three major values that you can adjust in your camera. (F stop, Shutter Speed, ISO).
If you are just starting out I would recomend going through Canon's free tutorial for entry level DSLR users.
http://web.canon.jp/Im​aging/enjoydslr/index.​htmlexternal link

--Colin

Colin, GREAT suggestion onthe website! I am "trying" to help my wife learn how to use our 20D. I don't have the photo to layman terminology translator. This webpage does and looks fun to use. Thanks!

Post #12, Sep 22, 2006 19:26:38


michael
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Unfortunately, it kills all of it's students.:rolleyes:
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colinmcnamara
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evilmichael wrote in post #2023688external link
Colin, GREAT suggestion onthe website! I am "trying" to help my wife learn how to use our 20D. I don't have the photo to layman terminology translator. This webpage does and looks fun to use. Thanks!

Yeah, it is a super one. Though it does make me want to go out and buy more glass.

--Colin

Post #13, Sep 22, 2006 21:55:31


Cameras & Lenses
Canon
20D

Canon EF 24-70 2.8L USM
Canon EF 50mm 1.8 ll
Canon EF-S 18-55
Sony DSC-P9
Lighting & Studio Equipment
Canon
Speedlight 580EX Flash
Stofen OmniBounce
Sunpack 383 Auto Flash
Calumet 48" Umbrella reflector & Stand
Photek Background in a Bag
Adorama 5n1 48" reflector
Supporting Equipment

Spyder2 Pro monitor calibrator
Tamarac Expedition 9 Bag
Lowepro Toploader Bag
4GB & 2GB Compact Flash
2x BP111A Batteries
1 Wife 2 Kids

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tim
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An F stop is like a bus stop, except for one little thing...

Post #14, Sep 23, 2006 03:04:08


NZIPP Qualified Professional wedding photographer.
Wellington Wedding Photographerexternal link ~ Camera and Lens Reviewsexternal link ~ Photographers Tech Supportexternal link
Read all my FAQs (wedding, printing, lighting, books, etc)

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