Forum: Digital Photography
October 31st 06, 04:23 PM Posted to rec.photo.digital
|
Replies: 45
Views: 2,016
What make a lens normal ?
Dave Martindale wrote:
It depends on the lens design. The "classical" way of doing this is
mounting all of the lens elements in a rigid barrel with fixed spacing
between...
|
Forum: Digital Photography
October 30th 06, 05:07 AM Posted to rec.photo.digital
|
Replies: 45
Views: 2,016
What make a lens normal ?
Dave Martindale wrote:
writes:
With a pinhole, you can have any "focal length" you want. With a lens,
you find the point of best focus, and then its focal length *is...
|
Forum: Digital Photography
October 29th 06, 06:21 AM Posted to rec.photo.digital
|
Replies: 45
Views: 2,016
What make a lens normal ?
Dave Martindale wrote:
43mm is not the distance from the back of the lens to the sensor. It
is the effective focal length of the lens, which means that the
magnification is...
|
Forum: Digital Photography
October 29th 06, 06:10 AM Posted to rec.photo.digital
|
Replies: 5
Views: 252
What's "focus"
Don Stauffer in Minnesota wrote:
For a book, Time Life did a series on photography many years ago. One
of the volumes was called "The Camera". Many pubic libraries...
|
Forum: Digital Photography
October 27th 06, 05:11 AM Posted to rec.photo.digital
|
Replies: 5
Views: 252
What's "focus"
I had never thought of this, because most of my shooting has been done with
a fixed focus camera. But now I am wondering, what (I mean physicaly) make
an image in focus ?
Am I right to assume that...
|
Forum: Digital Photography
October 27th 06, 04:55 AM Posted to rec.photo.digital
|
Replies: 45
Views: 2,016
What make a lens normal ?
Dave Martindale wrote:
There's nothing special about the absolute number "50". It is the
angular relationship between the focal length and the size of the image
circle that...
|
Forum: Digital Photography
October 24th 06, 07:37 AM Posted to rec.photo.digital
|
Replies: 45
Views: 2,016
What make a lens normal ?
Scott W wrote:
Sort of, less bending then a wide angle lens and smaller elements then
a telephoto lens. There is a sweet spot when lenses are the cheapest
to make and...
|
Forum: Digital Photography
October 24th 06, 07:23 AM Posted to rec.photo.digital
|
Replies: 3
Views: 426
macro button
Paul Rubin wrote:
What does it do ?
Does it add a little lens behind the current lens ?
I've wondered about that (most cameras have it). My guess is that...
|
Forum: Digital Photography
October 22nd 06, 01:53 AM Posted to rec.photo.digital
|
Replies: 3
Views: 426
macro button
I've got a old digital camera (Fuji A201), and it has a "macro" button which
makes the camera able to work at ~ 30 cm, rather than 1 m minimum.
What does it do ?
Does it add a little lens behind the...
|
Forum: Digital Photography
October 15th 06, 12:53 AM Posted to rec.photo.digital
|
Replies: 8
Views: 821
Why aren't viewfinder 100%
"Mark²" mjmorgan(lowest even number wrote:
opbjects at the edges of the frame. This meant cropping, which to me is a
waste of resolution. Yes, I should have caught it on the...
|
Forum: Digital Photography
October 12th 06, 07:05 AM Posted to rec.photo.digital
|
Replies: 8
Views: 821
Why aren't viewfinder 100%
Thanks for everybody who has answered my other threads, I've learned a lot.
Here is another question: Why is it that on most dSLR the viewfinder
does not show 100% of the actual shot ?
|
Forum: Digital Photography
October 10th 06, 06:28 AM Posted to rec.photo.digital
|
Replies: 39
Views: 1,622
When does SLR start to make sense ?
D Russell wrote:
I think that an SLR starts to make sense when you're really committed to
spending a lot more money on your hobby. Since a crappy photographer with a
£2k...
|
Forum: Digital Photography
October 10th 06, 06:22 AM Posted to rec.photo.digital
|
Replies: 39
Views: 1,622
When does SLR start to make sense ?
D Russell wrote:
For me a DSLR would help with manual focus, since i've not yet seen a really
good manual focus on a compact, and taking photos of birds in flight the
...
|
Forum: Digital Photography
October 10th 06, 06:10 AM Posted to rec.photo.digital
|
Replies: 12
Views: 956
How does it work ?
wrote:
That's not correct, unless you're writing about the absolute bottom of
the range digicam.
All digital cameras with an EVF and almost all with a LCD have a
shutter,...
|
Forum: Digital Photography
October 9th 06, 09:38 PM Posted to rec.photo.digital
|
Replies: 12
Views: 956
How does it work ?
Don Stauffer in Minnesota wrote:
D Russell wrote:
With a DSLR you've got a mirror still, usually, at least as I understand it,
which redirects the light from the...
|
Forum: Digital Photography
October 8th 06, 03:43 PM Posted to rec.photo.digital
|
Replies: 39
Views: 1,622
When does SLR start to make sense ?
wrote:
The difference will only become apparent when shooting under less than
ideal situations. Low lighting and/or fast moving subjects will make
for blurry photos on...
|
Forum: Digital Photography
October 8th 06, 03:40 PM Posted to rec.photo.digital
|
Replies: 49
Views: 1,924
APS-C in compact
wrote:
Or maybe we could compromise on a slightly smaller sensor, but still
large enough to have good noise characteristics...
Oh wait, that was what 4/3 was meant to...
|
Forum: Digital Photography
October 8th 06, 06:07 AM Posted to rec.photo.digital
|
Replies: 39
Views: 1,622
When does SLR start to make sense ?
I understand that the bigger sensors in the current SLRs will give a better
image than the sensors in the compacts, but when does the difference start
to show ? And how ?
Say comparing a good...
|
Forum: Digital Photography
October 7th 06, 02:13 PM Posted to rec.photo.digital
|
Replies: 49
Views: 1,924
APS-C in compact
Paul Rubin wrote:
writes:
So this is the answer - a three time, tiny retractable zoom for a FF sensor
(or even APS) would just be slow (tiny maximum...
|
Forum: Digital Photography
October 7th 06, 02:06 PM Posted to rec.photo.digital
|
Replies: 49
Views: 1,924
APS-C in compact
David J Taylor wrote:
Paul Rubin wrote:
The 10x and 12x zooms for APS-C DSLR's are pretty slow also. And most
DSLR users don't...
|
Forum: Digital Photography
October 7th 06, 06:22 AM Posted to rec.photo.digital
|
Replies: 49
Views: 1,924
APS-C in compact
Dave Martindale wrote:
The Amazon photo is for a different camera, the "Stylus Epic Zoom 115".
Though I haven't used that particular one, I have used other Olympus
Stylus...
|
Forum: Digital Photography
October 6th 06, 08:22 PM Posted to rec.photo.digital
|
Replies: 49
Views: 1,924
APS-C in compact
David J Taylor wrote:
wrote:
Do you think there is any chance we'll see APX-C size sensor in
compact digicam ?
Like this...
|
Forum: Digital Photography
October 6th 06, 08:06 PM Posted to rec.photo.digital
|
Replies: 49
Views: 1,924
APS-C in compact
"Protoncek \(ex.SleeperMan\)" wrote:
Why would the lens need to be larger and heavier than an APS film
camera's lens? That's the part I've never understood. Lots...
|
Forum: Digital Photography
October 6th 06, 08:00 PM Posted to rec.photo.digital
|
Replies: 12
Views: 956
How does it work ?
I've got a really basic question: Where does the image you get in the LCD
and EVF come from ?
Does it come from the sensor ?
If so, how does the shutter speed works, do they close the shutter,...
|
Forum: Digital SLR Cameras
October 6th 06, 06:27 PM Posted to rec.photo.digital.slr-systems
|
Replies: 3
Views: 249
retractable zoom
In the compact world (both film and digital) we see a lot of retractable zoom.
Why isn't there any like that in the SLR world ?
I mean, the compact 35mm film had a "sensor" of 24x36mm, so the lens...
|