Archived posting to the Leica Users Group, 2001/03/10
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At 1:46 PM -0800 3/10/01, Mark Rabiner wrote:
>"B. D. Colen" wrote:
>>
>> Dan Post posted...
>><Snip> verticals from going all catty-wumpus, but I think I am
>>missing something.
>>
>> What do you mean by superwide - 20/21, or are you refering to the Cosina
>> 15? I have had no experience with the 15, but the 20/21 is one of the
>> focal lengths I use the most, and get the best results from.
>>
>> B. D.
>
>Mark Rabiner marked...
>When i think superwide i think the 38 Hasselblad Biogon. A 96 degree diagonal
>viewing angle.
>On a 35mm camera that would be a 19.4mm lens.
>So that splits the dif between a 21 and a 15 almost.
>I think 21 is where superwide starts.
>24 is very wide
>28 is pretty darn wide
>35 is thinking about being wide
>
>But i think we should call the 12 ultrawide.
>
>Mark R.
Actually, the Biogon covers about 92 degrees on the diagonal, which
is very close to the 21 on 35. For width, the Biogon covers about 73
degrees, which is almost exactly what a 24 covers on 35. That feels
right to me, as I use the Biogon a lot like a 24 with a bit of
'shift' if I'm intending a horizontal layout.
The 12 and 15 are completely different in what they can do and how
things feel doing them. 112 degrees and 100 degrees side to side
respectively means that you can stand in the corner of a room and get
_all_ the walls in. I've used a 15 for over 25 years and I've had the
12 for nearly 5 months now, but taming the 12 is still going to take
a while.
Even wider is a 35 (actual focal length 36.1mm) on 4x5. This gives
dark corners, but it can still be quite effective. 120 degrees side
to side, and 105 degrees top to bottom, and all rectilinear. It
covers 6x12 easily, with some movements.
- --
* Henning J. Wulff
/|\ Wulff Photography & Design
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