Focal length chart

Archived from groups: rec.photo.digital (More info?)

I am familiar with the lens focal lengths for a film camera. Is there a site
where I can find comparison with digital focal lengths?
leica@aol.com
I haven't taken my best picture yet.

Archived from groups: rec.photo.digital (More info?)

leica@aol.com (LEICA) writes:

> I am familiar with the lens focal lengths for a film camera. Is there a site
> where I can find comparison with digital focal lengths?

They're not all the same.

The consumer digicams, however, cite "35mm equivalent focal lengths",
which for angle of view purposes are directly comparable to 35mm
lenses.

The DSLRs cite a "cropping factor" (the Nikons are all 1.5x, the
cheaper Canons are 1.6x, and so forth), which can be applied to the
actual focal length of a lens mounted on them to get the focal length
which would have the same angle of view on a 35mm film camera.
--
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Pics: <http://dd-b.lighthunters.net/> <http://www.dd-b.net/dd-b/SnapshotAlbum/>
Dragaera/Steven Brust: <http://dragaera.info/>

Archived from groups: rec.photo.digital (More info?)

"LEICA" <leica@aol.com> wrote in message
news:20050117114116.25470.00000045@mb-m13.aol.com...
> I am familiar with the lens focal lengths for a film camera. Is there a
site
> where I can find comparison with digital focal lengths?
> leica@aol.com
> I haven't taken my best picture yet.

I answered this for the D70 in the "Newbie Lens/Focal Length Question"
thread.
One thing I forgot to say in that thread was that in order to calculate the
diagonal
you square both of the sensor dimensions, add them together, then take the
square
root.

HTH,
George

Archived from groups: rec.photo.digital (More info?)

>One thing I forgot to say in that thread was that in order to calculate the
>diagonal
>you square both of the sensor dimensions, add them together, then take the
>square
>root.
>
>HTH,
>George
>
>

Sorry George , you lost me. Guess I'll just start using me extra Canon lenses
on the Digital Rebel and learn about changes in focal length as I go.
leica@aol.com
I haven't taken my best picture yet.

Archived from groups: rec.photo.digital (More info?)

leica@aol.com (LEICA) wrote in
news:20050117193827.12708.00000093@mb-m24.aol.com:

>>One thing I forgot to say in that thread was that in order to
>>calculate the diagonal
>>you square both of the sensor dimensions, add them together, then take
>>the square
>>root.
>>
>>HTH,
>>George
>>
>>
>
> Sorry George , you lost me. Guess I'll just start using me extra Canon
> lenses on the Digital Rebel and learn about changes in focal length as
> I go. leica@aol.com
> I haven't taken my best picture yet.
>

There are -no- changes in focal length.

--
http://www.neopets.com/refer.phtml?username=moosespet

Archived from groups: rec.photo.digital (More info?)

John McWilliams <jpmcw@comcast.net> wrote in news:U-udnZvZXawlqnDcRVn-
sw@comcast.com:

> Jon Pike wrote:
>> leica@aol.com (LEICA) wrote in
>> news:20050117114116.25470.00000045@mb-m13.aol.com:
>>
>>
>>>I am familiar with the lens focal lengths for a film camera. Is there
>>>a site where I can find comparison with digital focal lengths?
>>>leica@aol.com
>>>I haven't taken my best picture yet.
>>>
>>
>>
>> They're exactly the same.
>>
> Ignore the troll.
>
> The pedants and trolls have a field day with this one. It really doesn't
> matter what you call it, cropping, focal length, etc. Most reasonable
> people grasp what the core is.

actually, it does matter. cropping an image is entirely different from
changing the focal length of a lense.


--
http://www.neopets.com/refer.phtml?username=moosespet