On Jul 18, 9:22*am, "Vass" <mark...@DELnaldernet.plus.com> wrote:
> Can someone clarify something for me?
>
> kit lens 18-55mm
> I see 24mm and 28mm prime lenses listed as "wide angle"
> so is my kit lens a "Wide angle" at the 18mm end?
>
> or is there a difference?
> i.e. would I benefit from buying the 24mm
> (OK I understand i get a better apeture as well)
> TIA
> --
> Vass
It depends a little bit on format size. Some consider any focal
length fhorter than the diagonal of the format size to be "wide
angle". So for a 35mm or full frame focal plane, 18mm is definitely
wide. However, with a small enough chip it would then become not a
wide angle.
Vass wrote:
> Can someone clarify something for me?
>
> kit lens 18-55mm
> I see 24mm and 28mm prime lenses listed as "wide angle"
> so is my kit lens a "Wide angle" at the 18mm end?
>
> or is there a difference?
> i.e. would I benefit from buying the 24mm
> (OK I understand i get a better apeture as well)
> TIA
The 24mm focal length is already included in the 18mm - 55mm range.
With a typical digital SLR, the sensor is smaller than the full 35mm
frame, so the image is cropped. The result is as if you had used a lens
of about 1.5 times the marked focal length, so the 18-55mm lens on a DSLR
produces the same image as a 24-82mm lens on a film camera.
More precise details once you give the make - as DSLRs differ in the exact
amount by which they crop the 35mm image frame.
"Vass" <markDEL@DELnaldernet.plus.com> wrote:
>Can someone clarify something for me?
>
>kit lens 18-55mm
>I see 24mm and 28mm prime lenses listed as "wide angle"
>so is my kit lens a "Wide angle" at the 18mm end?
Yes, but: it also depends on what kind of camera you are using this
lens.
On a full-frame camera 50mm is considered 'normal' while on camera with
a DX-size sensor 32mm or 33mm are considered 'normal' (crop factor of
1.5 resp. 1.6).
>or is there a difference?
>i.e. would I benefit from buying the 24mm
Different horse. Lenses with a fixed focal length (often called 'prime')
are typically higher quality (and as you mentioned often faster) lenses.
This is because a zoom lens has to be jack of all trades errrrmmm, focal
length which requires compromises, while a prime lens is optimized for
one particular focal length only.
"David J Taylor"
<david-taylor@blueyonder.neither-this-bit.nor-this-bit.co.uk> wrote in
message news:rX1gk.29148$E41.8323@text.news.virginmedia.co m...
> Vass wrote:
>> Can someone clarify something for me?
>>
>> kit lens 18-55mm
>> I see 24mm and 28mm prime lenses listed as "wide angle"
>> so is my kit lens a "Wide angle" at the 18mm end?
>>
>> or is there a difference?
>> i.e. would I benefit from buying the 24mm
>> (OK I understand i get a better apeture as well)
>> TIA
>
> The 24mm focal length is already included in the 18mm - 55mm range.
>
> With a typical digital SLR, the sensor is smaller than the full 35mm
> frame, so the image is cropped. The result is as if you had used a lens
> of about 1.5 times the marked focal length, so the 18-55mm lens on a DSLR
> produces the same image as a 24-82mm lens on a film camera.
>
> More precise details once you give the make - as DSLRs differ in the exact
> amount by which they crop the 35mm image frame.
>
> Can someone clarify something for me?
>
> kit lens 18-55mm
> I see 24mm and 28mm prime lenses listed as "wide angle"
> so is my kit lens a "Wide angle" at the 18mm end?
GENERALLY speaking (For lenses designed for a 35mm frame):
A lens that is close to 50mm is a "standard" lens
'Wide angle' means a focal length that is less than 50 mm. As the
focal length gets smaller, the angle gets wider.
A focal length greater than 50mm becomes a telephoto lens. The
longer the focal length, the greater the telephoto.
A lens with a variable focal length, (like the 18-55mm kit lens)
is a zoom lens. If a lens doesn't have a variable focal length,
then it is a fixed lens.
Your 18mm-55mm lens is a zoom lens that can be adjusted from wide
angle to medium telephoto. It covers the 50mm standard so it would
be called a standard zoom. Most kit and general purpose lenses
use these focal lengths.
If you had a lens that you could adjust from 15mm to 30mm, it would
be a wide angle zoom. A 100-300mm lens would be a telephoto zoom.
Below is a list of most of the lenses Canon sells. Note how
they break them down into these catagories.
Vass wrote:
[]
> Canon EOS 350D
> thanks for the info
... so what I wrote is approximately true, and your 18mm - 55mm lens is
"wide angle" at the 18mm end and "medium telephoto" at the 55mm end. It's
a general purpose, light, low-cost, do-everything lens. Until you learn
more about using the camera, I would suggest not buying any more lenses.
> Vass wrote:
>> Can someone clarify something for me?
>>
>> kit lens 18-55mm
>> I see 24mm and 28mm prime lenses listed as "wide angle"
>> so is my kit lens a "Wide angle" at the 18mm end?
>>
>> or is there a difference?
>> i.e. would I benefit from buying the 24mm
>> (OK I understand i get a better apeture as well)
>> TIA
>
> The 24mm focal length is already included in the 18mm - 55mm range.
>
> With a typical digital SLR, the sensor is smaller than the full 35mm
> frame, so the image is cropped. The result is as if you had used a lens
> of about 1.5 times the marked focal length, so the 18-55mm lens on a DSLR
> produces the same image as a 24-82mm lens on a film camera.
>> With a typical digital SLR, the sensor is smaller than the full 35mm
>> frame, so the image is cropped. The result is as if you had used a lens
>> of about 1.5 times the marked focal length, so the 18-55mm lens on a DSLR
>> produces the same image as a 24-82mm lens on a film camera.
>>
>> More precise details once you give the make - as DSLRs differ in the exact
>> amount by which they crop the 35mm image frame.
>>
>
> Canon EOS 350D
> thanks for the info
The math is very simple for any other lens you might want to
consider. To find out the "effective" focal length, you multiply by
a factor determined by your camera's sensor size. For Nikon's DX
cameras, this is 1.5. For your EOS 350D, it's 1.6. So multiplying
18 and 55
(oops - hit the wrong key while typing sent the reply prematurely)
>> With a typical digital SLR, the sensor is smaller than the full 35mm
>> frame, so the image is cropped. The result is as if you had used a lens
>> of about 1.5 times the marked focal length, so the 18-55mm lens on a DSLR
>> produces the same image as a 24-82mm lens on a film camera.
>>
>> More precise details once you give the make - as DSLRs differ in the exact
>> amount by which they crop the 35mm image frame.
>>
>
> Canon EOS 350D
> thanks for the info
The math is very simple for any other lens you might want to
consider. To find out the "effective" focal length, you multiply by
a factor determined by your camera's sensor size. For Nikon's DX
cameras, this is 1.5. For your EOS 350D, it's 1.6. So multiplying
18 and 55 by 1.6 shows that the 18-55mm lens is equivalent to a
28.8-88mm lens on a 35mm camera, and 28.8 is considered to be a mild
wide angle. The same lens on a Nikon body would be equivalent to
using a 27-82.5mm lens.
Your 24mm and 28mm lenses would be considered to be wide angle
lenses if used on 35mm cameras or on DSLRs having large "Full Frame"
sensors. On your EOS 350D, they're equivalent to 38.4mm and 44.8mm
lenses, which really put then in the Normal (not Wide) category.
18m 10mm? 
Linear Mode
