[LRflex] Re: Macro - Elpro or Tube?
- From: "David Young" <telyt@xxxxxxxxx>
- To: leicareflex@xxxxxxxxxxxxx
- Date: Sun, 25 Sep 2005 09:29:09 -0700
On 25/09/2005 at 6:12 PM Douglas Sharp wrote:
>Interesting,
>I have a rather clever , and extremely heavy, Beroflex 3,5-4,3/35-100mm
>zoom, in C/Y, mount which has a built-in close focus function.
>By turning a ring you can shift the whole optical construction further
>away from the film plane.
Douglas:
That makes sense. Obviously, the makers decided that the optical results=
would be OK (or, just felt they needed to have the feature to be=
competitive) and went that route.
For those who may not know, the difference between a 'zoom' lens and a=
'variable focal length' lens is that with the VFL lens, you must re-focus=
after each change in focal length. A zoom lens can be focused at full=
tele and then 'zoomed' back to wide, without changing the focus. (It will=
go the other way, too - but focusing errors at the w/a end make it=
unwise.)
For close-focus work, where the focusing is often done by 'rocking' the=
camera to achieve the correct focus point, this distinction would be moot.=
Thus I can see Beroflex going this route.
I'd be intersted to hear what quality the Beroflex lens gets in c/u mode.=
Am I issuing a challenge? You bet! ;-)
Cheers!
David Young,
Logan Lake, BC
CANADA.
Personal Web-site at: http://www3.telus.net/~telyt
Leica Reflex Forum web-page: http://www3.telus.net/~telyt/lrflex.htm
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