[Leica] CV 15mm lens on M8

[kididdoc at cox.net (Steve Barbour)]

On Mar 27, 2008, at 2:13 PM, Geoff Hopkinson wrote:
> Steve, your 24mm lens virtually fills the M8 viewfinder. That is the  
> widest
> frameline built-in. I don't know how you can see anything outside that
> frameline. Due to the (smaller than 24x36) sensor crop, that  
> frameline shows
> you an approximation of the crop effect (about the same view angle  
> as a 32mm
> on a film M)
> To use a 15mm lens you should use an external finder which is  
> designed for a
> 21mm lens on a film M.
> All of the framelines show less than the actual sensor capture  
> anyway. (they
> are calibrated for the view at .7m)
> The key is to think of the framelines as approximating the view  
> angle, not
> the nominal focal length. Each lens produces the same image at the  
> plane of
> focus on any M. The M8 sensor, being smaller than 24x36, actually  
> captures
> about 75% of it.


thanks Geoff...


Steve


>
>
> Cheers
> Geoff
> http://www.pbase.com/hoppyman/e
> http://gallery.leica-users.org/v/gh/
> -----Original Message-----
> From: lug-bounces+hoppyman=bigpond.net.au@leica-users.org
> [mailto:lug-bounces+hoppyman=bigpond.net.au@leica-users.org] On  
> Behalf Of
> Steve Barbour
> Sent: Friday, 28 March 2008 02:06
> To: Leica Users Group
> Subject: [Leica] CV 15mm lens on M8
>
> a question here , as my logic becomes  befuddled...
>
>
> A 21mm lens on the M8 just about fills the M8 viewfinder...
>
> a CV heliar 15mm lens on the M8 is really a 21mm lens, and can be used
> with a 21mm external viewfinder...
>
> so... can one also use the M8 viewfinder, as the viewfinder for a CV
> 15mm lens...?
>
>
> Why is this so difficult?
>
> (a yes or no answer is inadequate, without some logical explanation...
> please)
>
>
> thanks, Steve
>
>
>
>
>
> "I never wanted to be famous"
> http://www.blurb.com/bookstore/detail/186890
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information
>
>
>
> _______________________________________________
> Leica Users Group.
> See http://leica-users.org/mailman/listinfo/lug for more information

best,
Steve

kididdoc@cox.net


"I never wanted to be famous"
http://www.blurb.com/bookstore/detail/186890