[HUG ] Re: swc for sale?

angle of view make so sense in these days of a melange of sensors sizes.
but getting people to talk about AOV would be like getting the US to
convert to the metric system (any remember 1975??)

Eric


On Mon, Jun 16, 2008 at 12:33 PM, Franc Flipsen <fujifan@xxxxxxxxx> wrote:
> Hi Frank,
>
> I have to agree with you on the fact that the focal length of the lens does
> not change but 99% of people don't know what the angle of view is, besides
> it is not marked on a lens but focal length is.  The conversion factor for
> digital cameras is designed for focal length equivalents in regards to the
> angle of view.  I don't think it needs to be said that "a 38mm biogon used
> on a 645 sensor gives you the same angle of view as a 42mm biogon used with
> a 645 A16 film back" when saying "a 38mm biogon used on a 645 sensor gives
> you a 42mm biogon" is simpler and easier to understand for most people.
>
> Regards
> Franc
>
>
> ----- Original Message ----- From: "Frank Filippone" <red735i@xxxxxxxxxxxxx>
> To: <hasselblad@xxxxxxxxxxxxx>
> Sent: Sunday, June 15, 2008 10:34 PM
> Subject: [HUG ] Re: swc for sale?
>
>
>> I never could understand why anyone would re-state the effective Fl of a
>> lens because their sensor is not something else....
>>
>> Do we say..... Hasselblad 80mm lens on a 6x6 negative is the same as a
>> 50mm
>> lens?  No.  ( we may make the comparison, but it is never stated nor do I
>> ever remember it being used in this way....)
>>
>> A 38mm Biogon is ALWAYS  38m.  Nothing changes that.  Nothing.
>>
>> Try this, if you are trying to make a comparison....
>>
>> The 38 Biogon in an SWC has the same angle of view using my Phase One 645
>> back as a 42mm Lens on 6x6.
>>
>> Then again, one is square and the other is rectangular, further making
>> this
>> confusing.......and even more obtuse......
>>
>> I guess my Engineering background is showing.......
>>
>>
>> Frank Filippone
>> red735i@xxxxxxxxxxxxx
>>
>>
>> The 645 sensor with a 1.1 to 1 crop
>> factor gives me a 42mm biogon
>>
>>
>>
>>
>>
>> =============================================================================================================
>> To unsubscribe from this list, go to www.freelists.org and logon to your
>> account (the same e-mail address and password you set-up when you
>> subscribed,) and unsubscribe from there.
>>
>
>
> =============================================================================================================
> To unsubscribe from this list, go to www.freelists.org and logon to your
> account (the same e-mail address and password you set-up when you
> subscribed,) and unsubscribe from there.
>
>

=============================================================================================================
To unsubscribe from this list, go to www.freelists.org and logon to your 
account (the same e-mail address and password you set-up when you subscribed,) 
and unsubscribe from there.

Other related posts: