Re: [KOML] Depth of Field

["Colin Thomas" <thomas@sian96.freeserve.co.uk>]

Not all of the 90mm lenses have a dof scale on the lenshood, my own doesn't.
Presumably the bellows focusing prohibited a usable dof scale being provided
for the other lenses.
Using the dof scales in the instruction manual I made my own  table (using
Word 97) for the 90mm and 58mm lenses, printed them out, trimmed and placed
them back to back and laminated them so I have a waterproof card measuring
approx. 5 x 3 inches. It's not ideal (especially when I forget to take it
with me!) but it's usable.

Colin

----- Original Message -----
From: Tom Cogbill <zloi@seanet.com>
To: Koni-Omega Mailing List <koni-omega@snoopy.cmagic.com>
Sent: 03 November 1999 19:08
Subject: [KOML] Depth of Field


> Returning to the Depth of Field Question on Koni-Omega Lenses...
>
> apparently there is some misunderstanding as to what I am talking
> about.  On my 90 mm K-O lens, if you pull out the lens hood at the end
> of the barrel, a scale is revealed which correlates f-stop settings with
> distances.  This is a depth-of-field scale which, to my knowledge, most
> lenses with a fixed focal length have.  But not, unfortunately, the 180
> mm lens (nor the 58 mm, though DOF is generally large on W-A lenses,
> which is evidently why there is no separate focusing mechanism for it.
> The scales on the focusing knob simply indicate focusing distance).   I
> was just wondering why these lenses have no DOF scales.
>
> Thanks much to George for the link to the K-O manual.  It is far more
> informative than the rather silly "manual" that accompanied the version
> I bought.  (My camera, incidentally, has some slight variations from
> what is described in the on-line manual.)  I note that it gives DOF
> tables for all the lenses, so I guess they expect you to memorize these
> if you  want that info for the lenses other than the 90.
>
> Incidentally, does anyone have the "close-focus" adapters, and if so,
> are they worth a damn?  I've heard extension tubes were made for the K-O
> models, but that hardly anyone bought them, suggesting they may be
> impractical or of too limited value.
>
> --Tom
>
>