AndrewAir
Topic Author
Posts: 337
Joined: Sun Jul 14, 2002 2:08 pm

F/stops

Thu Aug 08, 2002 9:57 am

I have a Canon 7E and I have read the manual many times but it is hard to understand, it talks about F/stops and shutter speed. I don't understand what both of them are. I thought shutter speed was the ISO. Can anyone explain to me what they are.


Thanks
 
Staffan
Posts: 3879
Joined: Tue Mar 18, 2008 9:21 am

RE: F/stops

Thu Aug 08, 2002 10:04 am

ISO is a measure on how sensitive to light the film is (ISO 100, 200, 400, 800...)

Shutter speed is the time which the film is exposed to light (1/25, 1/50, 1/100 second and so on).

f/ stops is the same as aperture, it decides how much light that is let through the lense, aperture also affects the depth of focus (f/1.4, f/2.8, f/5.6 etc..)

Staffan

 
AndrewAir
Topic Author
Posts: 337
Joined: Sun Jul 14, 2002 2:08 pm

RE: F/stops

Thu Aug 08, 2002 10:08 am

What would be the best setting. Does anyone know how to program this on the Canon 7e
 
Staffan
Posts: 3879
Joined: Tue Mar 18, 2008 9:21 am

RE: F/stops

Thu Aug 08, 2002 10:11 am

If there is a P-mode (all automatic) that will be the best way to start.
 
PPGMD
Posts: 2398
Joined: Sun Sep 30, 2001 5:39 am

RE: F/stops

Thu Aug 08, 2002 10:24 am

On most cameras there are essentaly four modes that you can set the camera.

P: Program mode, the camera chooses all the settings (there are sometimes a couple of diffrent P modes) A good start but you want to expirement. To quote Phil G of Photo.net, "A good roll for me has 35 not so good photos, to show that I am expirmenting, and one well exposed photo, to show that I am not totally incompetent"
A: Appature Priority mode, in this mode you select the F Stop, and the camera will set the shutter speed. This mode is good when you want to control the depth of field that the photo will have. (this is the mode that I shoot in the most)
S: Shutter priority, In this mode you select the shutter speed and the camera will select the F stop. This mode for me is good when I need a certian shutter speed to get the photo that I want, wether that is to stop the action (fast shutter) or want to show motion (slow shutter).
M: Manual mode, in this mode you have complete control, you select both the shutter and the F Stop, often all the camera will do is tell you wether the settings that you have selected will produce a properly exposed photo or not.
M mode is another mode that I will use alot, because I like to have more control over my photos, in particular I like to have control of the depth of field.

Depth of field: is the zone of the sence that will be in acceptable sharpness, the higher the shutter, the larger the zone will be for that particule lens. F/16 on a 28mm is a larger zone than F/16 on a 600mm.

The best way to learn all this is to expirment. If you want to pick up a book that will cover all the basics, than one that I would suggest for you would be the National Geographic Photography Field Guide. I found that this book covers just about all the basics to a resonable amount of depth and presents alot of good tips in plain english.
At worst, you screw up and die.
 
PPGMD
Posts: 2398
Joined: Sun Sep 30, 2001 5:39 am

RE: F/stops

Thu Aug 08, 2002 10:44 am

Oh yeah forgot here is some free (my favirote word) reading online that will cover what I was talking about.
http://www.photo.net/making-photographs/exposure

Also take a look at the main area in the making photographs section
http://www.photo.net/making-photographs/

And while you are there browse around his website, there are many great guides, pictures and reviews that one can read. Its one of the best photography related websites that is available on the web.
http://www.photo.net
At worst, you screw up and die.

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