20D Newbie Queries

Stuart Moore said:

I've had my 20D for a couple of weeks now and I'm hoping someone
might be able to help with a couple of queries.

The first related to flash exposure compensation (page 96 in the
manual).

The instructions say that you press the metering/flash button, set
the power switch to the top position and use the large wheel to set
the EC.

On my 20D, the compensation seems to "work" (i.e. the viewfinder
and LCD both indicate FEC is working) while the power switch is
still in the "on" position.

I've no reason to think this is a problem, just curious about the
behaviour.

The second query relates to depth of field on my 17-85 IS. Do
tables exist with approximate depth of field figures for this lens
at different focal lengths and distances to main focused subject?
I've taken some close shots (1-2m to subject) and some at approx
10m to subject at F7.1 and was expecting more of the frame outside
the prime focus point (which is perfectly sharp) to be in focus.

Thanks for any help (and sorry if these are daft questions - I'm
still getting used to the camera!).

Click to expand...

Aurorax said:

http://www.dofmaster.com/dofjs.html

Stuart Moore said:

I've had my 20D for a couple of weeks now and I'm hoping someone
might be able to help with a couple of queries.

The first related to flash exposure compensation (page 96 in the
manual).

The instructions say that you press the metering/flash button, set
the power switch to the top position and use the large wheel to set
the EC.

On my 20D, the compensation seems to "work" (i.e. the viewfinder
and LCD both indicate FEC is working) while the power switch is
still in the "on" position.

I've no reason to think this is a problem, just curious about the
behaviour.

The second query relates to depth of field on my 17-85 IS. Do
tables exist with approximate depth of field figures for this lens
at different focal lengths and distances to main focused subject?
I've taken some close shots (1-2m to subject) and some at approx
10m to subject at F7.1 and was expecting more of the frame outside
the prime focus point (which is perfectly sharp) to be in focus.

Thanks for any help (and sorry if these are daft questions - I'm
still getting used to the camera!).

Click to expand...

Click to expand...

Stuart Moore said:

About the FEC, the thumb wheel seems to be working as the manual
predicts in all other cases....

Aurorax said:

http://www.dofmaster.com/dofjs.html

Stuart Moore said:

I've had my 20D for a couple of weeks now and I'm hoping someone
might be able to help with a couple of queries.

The first related to flash exposure compensation (page 96 in the
manual).

The instructions say that you press the metering/flash button, set
the power switch to the top position and use the large wheel to set
the EC.

On my 20D, the compensation seems to "work" (i.e. the viewfinder
and LCD both indicate FEC is working) while the power switch is
still in the "on" position.

I've no reason to think this is a problem, just curious about the
behaviour.

The second query relates to depth of field on my 17-85 IS. Do
tables exist with approximate depth of field figures for this lens
at different focal lengths and distances to main focused subject?
I've taken some close shots (1-2m to subject) and some at approx
10m to subject at F7.1 and was expecting more of the frame outside
the prime focus point (which is perfectly sharp) to be in focus.

Thanks for any help (and sorry if these are daft questions - I'm
still getting used to the camera!).

Click to expand...

Click to expand...

Click to expand...

Stuart Moore said:

I've had my 20D for a couple of weeks now and I'm hoping someone
might be able to help with a couple of queries.

The first related to flash exposure compensation (page 96 in the
manual).

The instructions say that you press the metering/flash button, set
the power switch to the top position and use the large wheel to set
the EC.

On my 20D, the compensation seems to "work" (i.e. the viewfinder
and LCD both indicate FEC is working) while the power switch is
still in the "on" position.

I've no reason to think this is a problem, just curious about the
behaviour.

The second query relates to depth of field on my 17-85 IS. Do
tables exist with approximate depth of field figures for this lens
at different focal lengths and distances to main focused subject?
I've taken some close shots (1-2m to subject) and some at approx
10m to subject at F7.1 and was expecting more of the frame outside
the prime focus point (which is perfectly sharp) to be in focus.

Thanks for any help (and sorry if these are daft questions - I'm
still getting used to the camera!).

Click to expand...

Rylee Isitt said:

The switch only needs to be set to enable the thumb wheel to
initially set the FEL. Once it's set, you can turn the switch to
disable the thumb wheel. You're not turning FEL off, just your
ability to use the thumb wheel.

Stuart Moore said:

I've had my 20D for a couple of weeks now and I'm hoping someone
might be able to help with a couple of queries.

The first related to flash exposure compensation (page 96 in the
manual).

The instructions say that you press the metering/flash button, set
the power switch to the top position and use the large wheel to set
the EC.

On my 20D, the compensation seems to "work" (i.e. the viewfinder
and LCD both indicate FEC is working) while the power switch is
still in the "on" position.

I've no reason to think this is a problem, just curious about the
behaviour.

The second query relates to depth of field on my 17-85 IS. Do
tables exist with approximate depth of field figures for this lens
at different focal lengths and distances to main focused subject?
I've taken some close shots (1-2m to subject) and some at approx
10m to subject at F7.1 and was expecting more of the frame outside
the prime focus point (which is perfectly sharp) to be in focus.

Thanks for any help (and sorry if these are daft questions - I'm
still getting used to the camera!).

Click to expand...

--



~ Rylee Isitt

Click to expand...

Aurorax said:

Stuart Moore said:

About the FEC, the thumb wheel seems to be working as the manual
predicts in all other cases....

Aurorax said:

http://www.dofmaster.com/dofjs.html

Stuart Moore said:

I've had my 20D for a couple of weeks now and I'm hoping someone
might be able to help with a couple of queries.

The first related to flash exposure compensation (page 96 in the
manual).

The instructions say that you press the metering/flash button, set
the power switch to the top position and use the large wheel to set
the EC.

On my 20D, the compensation seems to "work" (i.e. the viewfinder
and LCD both indicate FEC is working) while the power switch is
still in the "on" position.

I've no reason to think this is a problem, just curious about the
behaviour.

The second query relates to depth of field on my 17-85 IS. Do
tables exist with approximate depth of field figures for this lens
at different focal lengths and distances to main focused subject?
I've taken some close shots (1-2m to subject) and some at approx
10m to subject at F7.1 and was expecting more of the frame outside
the prime focus point (which is perfectly sharp) to be in focus.

Thanks for any help (and sorry if these are daft questions - I'm
still getting used to the camera!).

Click to expand...

Click to expand...

Click to expand...

Click to expand...

Stuart Moore said:

Aurorax said:

Stuart Moore said:

About the FEC, the thumb wheel seems to be working as the manual
predicts in all other cases....

Aurorax said:

http://www.dofmaster.com/dofjs.html

Stuart Moore said:

I've had my 20D for a couple of weeks now and I'm hoping someone
might be able to help with a couple of queries.

The first related to flash exposure compensation (page 96 in the
manual).

The instructions say that you press the metering/flash button, set
the power switch to the top position and use the large wheel to set
the EC.

On my 20D, the compensation seems to "work" (i.e. the viewfinder
and LCD both indicate FEC is working) while the power switch is
still in the "on" position.

I've no reason to think this is a problem, just curious about the
behaviour.

The second query relates to depth of field on my 17-85 IS. Do
tables exist with approximate depth of field figures for this lens
at different focal lengths and distances to main focused subject?
I've taken some close shots (1-2m to subject) and some at approx
10m to subject at F7.1 and was expecting more of the frame outside
the prime focus point (which is perfectly sharp) to be in focus.

Thanks for any help (and sorry if these are daft questions - I'm
still getting used to the camera!).

Click to expand...

Click to expand...

Click to expand...

Click to expand...

Click to expand...

Rylee Isitt said:

Rylee Isitt said:

The switch only needs to be set to enable the thumb wheel to
initially set the FEL. Once it's set, you can turn the switch to
disable the thumb wheel. You're not turning FEL off, just your
ability to use the thumb wheel.

Stuart Moore said:

I've had my 20D for a couple of weeks now and I'm hoping someone
might be able to help with a couple of queries.

The first related to flash exposure compensation (page 96 in the
manual).

The instructions say that you press the metering/flash button, set
the power switch to the top position and use the large wheel to set
the EC.

On my 20D, the compensation seems to "work" (i.e. the viewfinder
and LCD both indicate FEC is working) while the power switch is
still in the "on" position.

I've no reason to think this is a problem, just curious about the
behaviour.

The second query relates to depth of field on my 17-85 IS. Do
tables exist with approximate depth of field figures for this lens
at different focal lengths and distances to main focused subject?
I've taken some close shots (1-2m to subject) and some at approx
10m to subject at F7.1 and was expecting more of the frame outside
the prime focus point (which is perfectly sharp) to be in focus.

Thanks for any help (and sorry if these are daft questions - I'm
still getting used to the camera!).

Click to expand...

--



~ Rylee Isitt

Click to expand...

--



~ Rylee Isitt

Click to expand...

Aurorax said:

The instructions are telling you that for the thumb wheel to be
used, the On Off switch has to be in the vertical position ((c)
above) so you have to switch it to position (c) if you are doing
compenation. Once the compensation is done, it can be in position
(b) and (c) (but obviously not (a).

Stuart Moore said:

Aurorax said:

Stuart Moore said:

About the FEC, the thumb wheel seems to be working as the manual
predicts in all other cases....

Aurorax said:

http://www.dofmaster.com/dofjs.html

Stuart Moore said:

I've had my 20D for a couple of weeks now and I'm hoping someone
might be able to help with a couple of queries.

The first related to flash exposure compensation (page 96 in the
manual).

The instructions say that you press the metering/flash button, set
the power switch to the top position and use the large wheel to set
the EC.

On my 20D, the compensation seems to "work" (i.e. the viewfinder
and LCD both indicate FEC is working) while the power switch is
still in the "on" position.

I've no reason to think this is a problem, just curious about the
behaviour.

The second query relates to depth of field on my 17-85 IS. Do
tables exist with approximate depth of field figures for this lens
at different focal lengths and distances to main focused subject?
I've taken some close shots (1-2m to subject) and some at approx
10m to subject at F7.1 and was expecting more of the frame outside
the prime focus point (which is perfectly sharp) to be in focus.

Thanks for any help (and sorry if these are daft questions - I'm
still getting used to the camera!).

Click to expand...

Click to expand...

Click to expand...

Click to expand...

Click to expand...

Click to expand...

Stuart Moore said:

The FEC amount can be changed while the power switch is still in
the 'on' position (if the meter/flash button is pressed first).

To see what I mean, set the 20D power switch to the 'on' position,
press the metering/power button, rotate the thumb wheel and
(hopefully) see the exposure compensation amount change as the
wheel is rotated. Set it to (say) +2. If you take shot, the FEC
will be applied.

According to the manual, because the power switch hasn't been set
to the upper position (rather than the 'on' position) the FEC
'shouldn't' work.

I've just tried a test. I followed the manual's instruction for
setting FEC except that I didn't at any time set the power switch
to the top position. Instead, I left it at the 'on' position. FEC
worked perfectly (one shot exposed normally, then I tried another
+2 stops over exposure).

As I said, I'm not sure this is a fault. If you follow the manual
to the letter, it works as designed. However, using the method
above also works!

Rylee Isitt said:

Rylee Isitt said:

The switch only needs to be set to enable the thumb wheel to
initially set the FEL. Once it's set, you can turn the switch to
disable the thumb wheel. You're not turning FEL off, just your
ability to use the thumb wheel.

Stuart Moore said:

I've had my 20D for a couple of weeks now and I'm hoping someone
might be able to help with a couple of queries.

The first related to flash exposure compensation (page 96 in the
manual).

The instructions say that you press the metering/flash button, set
the power switch to the top position and use the large wheel to set
the EC.

On my 20D, the compensation seems to "work" (i.e. the viewfinder
and LCD both indicate FEC is working) while the power switch is
still in the "on" position.

I've no reason to think this is a problem, just curious about the
behaviour.

The second query relates to depth of field on my 17-85 IS. Do
tables exist with approximate depth of field figures for this lens
at different focal lengths and distances to main focused subject?
I've taken some close shots (1-2m to subject) and some at approx
10m to subject at F7.1 and was expecting more of the frame outside
the prime focus point (which is perfectly sharp) to be in focus.

Thanks for any help (and sorry if these are daft questions - I'm
still getting used to the camera!).

Click to expand...

--



~ Rylee Isitt

Click to expand...

--



~ Rylee Isitt

Click to expand...

Click to expand...

Stuart Moore said:

The FEC amount can be changed while the power switch is still in
the 'on' position (if the meter/flash button is pressed first).

To see what I mean, set the 20D power switch to the 'on' position,
press the metering/power button, rotate the thumb wheel and
(hopefully) see the exposure compensation amount change as the
wheel is rotated. Set it to (say) +2. If you take shot, the FEC
will be applied.

According to the manual, because the power switch hasn't been set
to the upper position (rather than the 'on' position) the FEC
'shouldn't' work.

I've just tried a test. I followed the manual's instruction for
setting FEC except that I didn't at any time set the power switch
to the top position. Instead, I left it at the 'on' position. FEC
worked perfectly (one shot exposed normally, then I tried another
+2 stops over exposure).

As I said, I'm not sure this is a fault. If you follow the manual
to the letter, it works as designed. However, using the method
above also works!

Rylee Isitt said:

Rylee Isitt said:

The switch only needs to be set to enable the thumb wheel to
initially set the FEL. Once it's set, you can turn the switch to
disable the thumb wheel. You're not turning FEL off, just your
ability to use the thumb wheel.

Stuart Moore said:

I've had my 20D for a couple of weeks now and I'm hoping someone
might be able to help with a couple of queries.

The first related to flash exposure compensation (page 96 in the
manual).

The instructions say that you press the metering/flash button, set
the power switch to the top position and use the large wheel to set
the EC.

On my 20D, the compensation seems to "work" (i.e. the viewfinder
and LCD both indicate FEC is working) while the power switch is
still in the "on" position.

I've no reason to think this is a problem, just curious about the
behaviour.

The second query relates to depth of field on my 17-85 IS. Do
tables exist with approximate depth of field figures for this lens
at different focal lengths and distances to main focused subject?
I've taken some close shots (1-2m to subject) and some at approx
10m to subject at F7.1 and was expecting more of the frame outside
the prime focus point (which is perfectly sharp) to be in focus.

Thanks for any help (and sorry if these are daft questions - I'm
still getting used to the camera!).

Click to expand...

--



~ Rylee Isitt

Click to expand...

--



~ Rylee Isitt

Click to expand...

Click to expand...

RichW said:

because the purpose of the switch is to prevent accidental
adjustment. You can't accidentally adjust FEC because you have to
first press the top button right button to enable it. Good luck,

Rich

Click to expand...