On Monday, 28 September 2015 18:48:46 UTC+1, dennis@home wrote:
On 28/09/2015 17:03, whisky-dave wrote:



Do the optics of lenses behave differently?

No that I know of.

They behave differently as film has a different response to off axis
images than a digital sensor does.

As far as I know the light traveling through lenes behaves the same irrespective of whether the camera has a film or sensor in it.



Does the reciprocity law (halve shutter speed so double aperture
etc) behave differently?

Yes significantly.

they are the same.

wrong.


It only matters in extreme cases.

so they aren't the same then are they.



you need to correct the exposure using characteristics that change
from one make of film to another;

yuo don;t get that with digital, you don't even have to think about
it.

You can change how the sensor responds and what is recorded so you do
need to think about it.

yuo can't change how a sensor responds. It is an electronic device which has charastretics which the user can NOT change.




So when studying photogrphy like my friend was who won a pjhopt comp
in spain. She works at a uni teaching photography and is an adobe
registered certified to teach.

???

teaching photography is differnt to getting someone to take the same snapshot as you can.



You might be making life more difficult for him if you make him
avoid using P or Av/Tv mode, but it will make it easier to learn
initially.

They have to know what those terms mean and why you use them.

That is what you are teaching isn't it?

Yes, and you DON'T even need a camera to teach that.


You give a kid a digital camera that is **** compared to their mobile
phone they get board unintrested and disruptive. Now you have 20 kids
around you not concentrating they'd rather use their phone to get a
far better picture than they could ever get with the digital camera
you've supplied.

So what are you trying to teach them if its not how to get a better
picture, it sounds like you have given them cr@p and expect them to use
it. I take it your film camera of choice is a box brownie.

No, but you wouldn't give them a smart phone, even though most people
could get better pictures with it.


Why does the image on my LCD look the same irrespected of
the aperature and shutter speed I set.

Because you have a cr@p camera

wrong answer .

So what's your answer? Is it that the image on an LCD screen
(either when used as a viewfinder or when examining the pictures
after taking) is too small to be able to distinguish clearly
between in-focus and out-of focus parts of the scene?

No because when you look at the screen you see what you might end up
with.

That is what you use a viewfinder for to see what you may get.

exactly what you may get.


you are going to take a p[icture of usain bolt in teh 100 meters on
the left is the start on the right is the finish. Are yuo saying
they'll be no differnce whether the exposure is 1/1000 or 1 second.
the aperature will take care of itself, but will what you see on the
screen be the same as the images yuo take. NO.

That is true of the viewfinder on your camera and is no different to a
digital camera., especially an SLR.

No it's not. A LCD well most DLSR or digital camera LCDs change brightness depending on your setting or AP and Tv so you can still see teh display and the brightness of teh dispalay will change depending on you;'r settings.
This is NOT true of a film SLR.


So far you haven't pointed out any difference between learning on a
digital and a film camera other than the ability to view the results.

So far you have proved you know noting about teaching.