Who agrees?

Have your say on issues related to using a DSLR camera.

Moderator: Moderators

Forum rules
Please ensure that you have a meaningful location included in your profile. Please refer to the FAQ for details of what "meaningful" is.

Who agrees?

Postby Oneputt on Thu May 05, 2005 4:36 pm

I have always thought it slightly ridiculous that when talking about aperture size, the smaller the number the larger the aperture.

I would like to start a revolution to clear up all confusion. Problem is it would probably cause more.
User avatar
Oneputt
Senior Member
 
Posts: 3174
Joined: Tue Jan 04, 2005 3:58 pm
Location: Stuck in traffic Maroochydore.

Postby cordy on Thu May 05, 2005 4:44 pm

rofl i was actually speaking to a mate the other night and we were both commenting on how silly it was

im in!

Chris
cordy
Member
 
Posts: 340
Joined: Mon Mar 07, 2005 3:04 pm
Location: Canberra - Nikon D70 / Canon 20D

Postby sirhc55 on Thu May 05, 2005 4:49 pm

I agree Oneputt - it’s like saying USM for sharpening :D
Chris
--------------------------------
I started my life with nothing and I’ve still got most of it left
User avatar
sirhc55
Key Member
 
Posts: 12930
Joined: Fri Sep 17, 2004 6:57 pm
Location: Port Macquarie - Olympus EM-10

Postby stubbsy on Thu May 05, 2005 4:52 pm

Of course it DOES make sense as it stands since the aperture size of say F8 is smaller than say F2 since F8 is 1/8 and F2 is 1/2. It's just photographers were/are a lazy bunch and dropped the 1/

It is however confusing.
Peter
Disclaimer: I know nothing about anything.
*** smugmug galleries: http://www.stubbsy.smugmug.com ***
User avatar
stubbsy
Moderator
 
Posts: 10748
Joined: Wed Dec 08, 2004 7:44 pm
Location: Newcastle NSW - D700

Postby Greg B on Thu May 05, 2005 4:53 pm

Noooooooooooooo :lol:

I found this...

The reason f/4 is a larger aperture than f/22 is that f-stops are fractions. f/4 is larger than f/22 just as 1/4th is larger than 1/22nd. Another important thing to remember is that since f/22 is a smaller aperture, or smaller opening of the lens, less light makes it into the camera and that means that a setting of f/22 requires more time to let in enough light for a proper exposure - a longer shutter speed.
Greg - - - - D200 etc

Talent hits a target no one else can hit; Genius hits a target no one else can see.
- Arthur Schopenhauer
User avatar
Greg B
Moderator
 
Posts: 5938
Joined: Fri Sep 03, 2004 7:14 pm
Location: Surrey Hills, Melbourne

Postby Oneputt on Thu May 05, 2005 5:00 pm

Chris you are right thats another one USM. I did read an explanation but hell it doesn't make sense.
User avatar
Oneputt
Senior Member
 
Posts: 3174
Joined: Tue Jan 04, 2005 3:58 pm
Location: Stuck in traffic Maroochydore.

Postby Greg B on Thu May 05, 2005 5:04 pm

Is it because you are masking out the unsharpness?
Greg - - - - D200 etc

Talent hits a target no one else can hit; Genius hits a target no one else can see.
- Arthur Schopenhauer
User avatar
Greg B
Moderator
 
Posts: 5938
Joined: Fri Sep 03, 2004 7:14 pm
Location: Surrey Hills, Melbourne

Postby pippin88 on Thu May 05, 2005 6:21 pm

With USM you make a mask that is unsharp. Which is then overlaid.
- Nick
Gallery
User avatar
pippin88
Senior Member
 
Posts: 1107
Joined: Thu Jan 06, 2005 6:42 pm
Location: Newcastle / Sydney

Postby Matt. K on Thu May 05, 2005 6:45 pm

Greg B got it right. Masking unsharpness. That figures in the same way that life masks out death. Only a computer nerd could construct terminology like that...or a Public Servant.
Regards

Matt. K
User avatar
Matt. K
Former Outstanding Member Of The Year and KM
 
Posts: 9981
Joined: Mon Sep 06, 2004 7:12 pm
Location: North Nowra

Re: Who agrees?

Postby darb on Fri May 06, 2005 2:09 pm

Oneputt wrote:I have always thought it slightly ridiculous that when talking about aperture size, the smaller the number the larger the aperture.

I would like to start a revolution to clear up all confusion. Problem is it would probably cause more.


absolutely !!

I almost always use the term "tighter" or "wider" when it comes to aperture. It cant be misconstrued.

ive found too many discrepencies with the way people explain ... like when someone says "i used a small aperture" half the time they mean F stop, half the time they mean physical size (complete reverse.) ...
User avatar
darb
Senior Member
 
Posts: 1020
Joined: Thu Sep 30, 2004 12:03 am
Location: allll ovvverr (live in perth)

Postby sirhc55 on Fri May 06, 2005 2:35 pm

USM goes back to the days of film - why it should be used in the same context with computers and photo programs is a mystery to me.
Chris
--------------------------------
I started my life with nothing and I’ve still got most of it left
User avatar
sirhc55
Key Member
 
Posts: 12930
Joined: Fri Sep 17, 2004 6:57 pm
Location: Port Macquarie - Olympus EM-10

Postby Oneputt on Fri May 06, 2005 2:42 pm

Absolutely Chris it goes back to film days using one image over another to create a halo and sharpen edges. No reason for that to be the case with digital.
User avatar
Oneputt
Senior Member
 
Posts: 3174
Joined: Tue Jan 04, 2005 3:58 pm
Location: Stuck in traffic Maroochydore.

Postby MCWB on Fri May 06, 2005 3:32 pm

I prefer the terms "stopped down" and "opened up" when referring to apertures, as it's clear which direction you're going in. I agree, many people get confused between 'physically' small aperture and small f/ number.
User avatar
MCWB
Senior Member
 
Posts: 2121
Joined: Mon Oct 11, 2004 10:55 pm
Location: Epping/CBD, Sydney-D200, D70

Re: Who agrees?

Postby Hlop on Fri May 06, 2005 3:48 pm

Oneputt wrote:I would like to start a revolution to clear up all confusion. Problem is it would probably cause more.


I won't recommend to start revolution - it leads to disorder. Actually, I know one country where revolution has happened almost 100 years ago and that country still in troubles. So, think at least ten times before starting any revolution :)
Mikhail
Hasselblad 501CM, XPAN, Wista DX 4x5, Pentax 67, Nikon D70, FED-2
User avatar
Hlop
Senior Member
 
Posts: 1355
Joined: Thu Jan 06, 2005 9:27 am
Location: Singapore

Postby tasadam on Fri May 06, 2005 3:56 pm

Greg B wrote:Noooooooooooooo :lol:

I found this...

The reason f/4 is a larger aperture than f/22 is that f-stops are fractions. f/4 is larger than f/22 just as 1/4th is larger than 1/22nd.


Hang on :idea: , it seems we missed the chance of turning the tide on this one.
When we got digital cameras, we shouldn't have had F2 we should have called it F0.5
F4 = F0.25
F8 = F0.125
F22 = 0.04545454545454545454545454545

Decimal for the Digital age!

End to the Fractions!

Problem solved - Bigger hole - Bigger number!

Then when the kids of today learn photography using Decimal Digital cameras, they won't know the foggiest thing about what all those settings are on that thing called a FILM camera! :lol: :lol: :lol: :lol:

Not only that, they'll be going for the dictionary to see what Fraction means...

Or they might be learning all they ever want to know from their Mobile Phone manual.....

Geez I crack myself up :?
Share what you know, learn what you don't.
Wilderness Photography of Tasmania http://www.tasmaniart.com.au
User avatar
tasadam
Senior Member
 
Posts: 631
Joined: Thu Dec 16, 2004 10:57 am
Location: Near Devonport, Tasmania

Postby MHD on Fri May 06, 2005 4:45 pm

yeah I use stopping down and opening up...

Makes sense to me... But I am a physicist... we are used to weird things
New page
http://www.potofgrass.com
Portfolio...
http://images.potofgrass.com
Comments and money always welcome
User avatar
MHD
Moderator
 
Posts: 5829
Joined: Sat Sep 11, 2004 8:51 pm
Location: Chicago Burbs

Postby Gordon on Fri May 06, 2005 7:21 pm

no no nooooo, photographers have it all wrong, just ask an astronomer. Aperture is the size of the opening that lets the light in, focal ratio is the ratio of focal length over aperture.
Simple!

My telescope for example:

focal length 2440mm
aperture 450mm
focal ratio f/5.4

Gordon
User avatar
Gordon
Member
 
Posts: 436
Joined: Fri Feb 18, 2005 11:04 pm
Location: Loomberah/Siding Spring Observatory

Postby darb on Fri May 06, 2005 9:46 pm

wide & narrow.

its impossible to confuse!
User avatar
darb
Senior Member
 
Posts: 1020
Joined: Thu Sep 30, 2004 12:03 am
Location: allll ovvverr (live in perth)

Postby phillipb on Fri May 06, 2005 10:16 pm

I don't know what all the fuss is about, they're just numbers, the trick is to visualise what that number represents to the end result. If you can do that before you press the shutter, you're well on your way to becoming a good photographer.
p.s. That's why I still bracket. :oops:
__________
Phillip


**Nikon D7000**
User avatar
phillipb
Senior Member
 
Posts: 2599
Joined: Sat Aug 07, 2004 10:56 am
Location: Milperra (Sydney) **Nikon D7000**

Re: Who agrees?

Postby digitor on Fri May 06, 2005 11:41 pm

Oneputt wrote:I have always thought it slightly ridiculous that when talking about aperture size, the smaller the number the larger the aperture.

I would like to start a revolution to clear up all confusion. Problem is it would probably cause more.


And another thing - the bigger the shutter speed, the shorter it is! What's going on here? A 500th should be a lot more than a 60th!

Cheers
What's another word for "thesaurus"?
User avatar
digitor
Senior Member
 
Posts: 925
Joined: Tue Nov 16, 2004 9:53 pm
Location: Tea Tree Gully, South Australia

Postby Aussie Dave on Sat May 07, 2005 12:00 am

Anyone ever had a real good look at the EXIF info and seen your exposure time (shutter) shown as 0.003125 (or 1/320 - as we commonly think of it) ??

I guess the fraction is easier to remember....say....type....read....???

However, there is one advantage to thinking about f-stops as "bigger".........the bigger the number, the bigger the DOF.
Dave
Nikon D7000 | 18-105 VR Lens | Nikon 50 1.8G | Sigma 70-300 APO II Super Macro | Tokina 11-16 AT-X | Nikon SB-800 | Lowepro Mini Trekker AWII
Photography = Compromise
User avatar
Aussie Dave
Senior Member
 
Posts: 1427
Joined: Sun Nov 21, 2004 1:40 pm
Location: West. Suburbs, Melbourne [Nikon D7000]

Postby darb on Sat May 07, 2005 4:29 am

i think the point of the discussion is not about what we personally refer to when we think of aperture, its when online communities discuss and "smaller, larger, stopped down" etc & confusion often occurs! :)

thats why i always say wider or narrow, some online counterparts otherwise think i mean "smaller F stop" others think "smaller aperture" and others thing "smaller F NUMBER" ... ie ive seen 3 interpretations of it!, ie some transpose smaller F stop to actually meaning a higher NUMBER< others take it as a smaller number (hence wider.) and it all ends in a mess when theres a bunch talking :)
User avatar
darb
Senior Member
 
Posts: 1020
Joined: Thu Sep 30, 2004 12:03 am
Location: allll ovvverr (live in perth)

Postby Oneputt on Sat May 07, 2005 8:10 am

Darb has it right. When I originally posed this question, it was because I see no value is sticking by outdated jargon.

We acept changes in technology readily so why not update the jargon as well?
User avatar
Oneputt
Senior Member
 
Posts: 3174
Joined: Tue Jan 04, 2005 3:58 pm
Location: Stuck in traffic Maroochydore.

Postby digitor on Sat May 07, 2005 11:20 am

I don't agree that the jargon (or some would say terminology) has become outdated - an F-number is the same thing it has always been. What has changed, however, seems to be people's willingness to learn the priciples and the terminology that describes it. Photography, after all, is but one area of optics where the concept of F-numbers is used, but it is the field with the greatest exposure (pun intended) to the masses.

I stand by my admittedly frivolous post above: if the shutter speed display shows 500, people seem to have no trouble accepting that is is less of an exposure than when the display reads 60, so why the problem with F stops?

Cheers
What's another word for "thesaurus"?
User avatar
digitor
Senior Member
 
Posts: 925
Joined: Tue Nov 16, 2004 9:53 pm
Location: Tea Tree Gully, South Australia


Return to General Discussion