Re: Medium format (was: plastic sheets

[Jaap Los <losjb@xxxxxxxxxxxxxx>]

Willem-Jan Markerink wrote:
> 
> On  5 Jul 97 at 18:54, Jim MacKenzie wrote:
> 
> > On Sat, 5 Jul 1997, Willem-Jan Markerink wrote:
> >
> > > Well, although I disagree that this color is soo hard to use: oddly
> > > enough this problem is an argument in favor of AF, as most AF
> > > systems work more than fine even through opaque filters like #87C.
> > > To get the IR-focus shift right after AF, the EOS USM/FT-M lenses are
> > > perfect....;-))
> >
> > And if you use ED Nikkor lenses, you don't even have to re-focus :-)
> 
> Show me a 200'ish handholdable ED lens, and I'll buy it
> tomorrow....using it with a Nikon->EOS adaptor of course....8-))
> Thusfar only non-AF's like Angenieux 180/2.3 (Nikon & Leica mount)
> and Leica 180/3.4 and 180/2.0 (oefff, too heavy/expensive....but as high end as
> one can get!) fit this category.
> Only a few white EOS primes lack IR-refocus, I believe only the
> 300/2.8 and 600/4.0. The Leica 70-200/2.8 might be a nice alternative
> too, not sure about its true-APO status....all apart from price that is....8-))
> Perhaps an idea to construct an overview of such optics....
> Do other manufacturers, like Pentax, Olympus, Contax/Zeiss have true
> APO's in the 200/2.8 category?
> 
> 
> 
> --
> Bye,
> 
> Willem-Jan Markerink
> 
>       The desire to understand
> is sometimes far less intelligent than
>      the inability to understand
> 
> <w.j.markerink@xxxxx>
> [note: 'a-one' & 'en-el'!]
> *
> ****
> *******
> ******************************************************
> *  To remove yourself from this list, send:          *
> *         UNSUBSCRIBE INFRARED                       *
> *       to                                           *
> *         MAJORDOMO@xxxxx                            *
> *----------------------------------------------------*
> *   For the IR-FAQ, IR-Gallery and heaps of links:   *
> *  http://www.a1.nl/phomepag/markerink/mainpage.htm  *
> ******************************************************
I own a Nikkor 2.8/80-220 mm ED zoomlens, a beauty. I understand from
your mail messages, that I don't need to refocus this lens for IR
photography?? Mind you, there is a special IR focus indicator on this
lens, meaning, that a refocus is needed. Am I right? Or will the
ED-element sufficiently correct also for IR? Is there any difference for
using HIE, Konica 750 or SFX200/Agfa200 as regards to IR focus
correction?
Greetings
Jaap Los
Holland
*
****
*******
******************************************************
*  To remove yourself from this list, send:          *
*         UNSUBSCRIBE INFRARED                       *
*       to                                           *
*         MAJORDOMO@xxxxx                            *
*----------------------------------------------------*
*   For the IR-FAQ, IR-Gallery and heaps of links:   *
*  http://www.a1.nl/phomepag/markerink/mainpage.htm  *
******************************************************

------------------------------