Whats the difference
Posted 27/08/2009 - 19:29
Link
ChrisA wrote:
There's a lot of extra information in Anvh's post that, with respect, perhaps isn't quite in the simple terms you were looking for! That doesn't at all make you stupid, which you clearly aren't.
Stefan does that, sometimes....Danny_boy wrote:
well, you can all call me stupid and what not, but I couldnt be anymore confused if i tried. I think i'm more confused now than when i started.
I thought your post last night at 19:15 was fine - as you summarised, zooms are variable focal length, telephotos are fixed, and a picture taken with a zoom set to focal length x should look much the same as one taken with a telephoto of focal length x.well, you can all call me stupid and what not, but I couldnt be anymore confused if i tried. I think i'm more confused now than when i started.
There's a lot of extra information in Anvh's post that, with respect, perhaps isn't quite in the simple terms you were looking for! That doesn't at all make you stupid, which you clearly aren't.
Quote:
i know about the perspective things, if your up close and take a photo everything have a bit more perspective, but if you go backwards then zoom in the photographed object in the previous picture and make it the same size then things look different
Exactly.i know about the perspective things, if your up close and take a photo everything have a bit more perspective, but if you go backwards then zoom in the photographed object in the previous picture and make it the same size then things look different
That's why I never ask him the time. Before you know he starts explaining
how a watch works.
Martin.
Posted 27/08/2009 - 19:40
Link
I know how watches work I really wanted to know because tele's are really expensive, theres no point in buying one if i can get a decently priced zoom that would pretty much do the same thing. I mainly take pictures of landscapes and nature, sometimes the odd random picture that only happens once every 100 years.
My next buy will be a wide angle and maybe a longer zoom.
By the way, has anybody got any pictures of the same thing taken with a telephoto at X focal length and a zoom at x focal length, just like to see what it really looks like,
cheers
My next buy will be a wide angle and maybe a longer zoom.
By the way, has anybody got any pictures of the same thing taken with a telephoto at X focal length and a zoom at x focal length, just like to see what it really looks like,
cheers
Posted 27/08/2009 - 20:34
Link
Malo1961 wrote:
Stefan does that, sometimes....
That's why I never ask him the time. Before you know he starts explaining
how a watch works.
Martin.
Yes sorry about that Stefan does that, sometimes....
That's why I never ask him the time. Before you know he starts explaining
how a watch works.
Martin.
What you said earlier is quite true Danny it's just this bit that is not right.
Danny_boy wrote:
but telephotos are fixed
you have variable focal lengths = zoomsbut telephotos are fixed
fixed focal lengths = primes
Telephoto only say something about the length of the focal length not more nothing less, so it can be zoom or a prime lens.
The ordering goes from:
ultra-wide, wide-angle, normal, short-telephoto, telephoto, extreme-telephoto.
Hopefully that explains it better
Danny_boy wrote:
By the way, has anybody got any pictures of the same thing taken with a telephoto at X focal length and a zoom at x focal length, just like to see what it really looks like.
They will look the same but a prime lens is optimized for that range since it is a fix focal length so the image quality will be most likely better.
By the way, has anybody got any pictures of the same thing taken with a telephoto at X focal length and a zoom at x focal length, just like to see what it really looks like.
Stefan
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
K10D, K5
DA* 16-50, DA* 50-135, D-FA 100 Macro, DA 40 Ltd, DA 18-55
AF-540FGZ
Add Comment
To leave a comment - Log in to Pentax User or create a new account.
290 posts
18 years
London
I've also heard 'long focus' used in reference to plate cameras but these are actually long focus rather than telephoto.
What's the difference between these?
The long focus lens needs almost 20 inches of barrel just for the light path, let alone the lens elements themselves.
The telephoto has the advantage of being more compact because it has extra elements that serve to shorten the distance between lens and sensor.