[LRFlex] Re: [LRFlex]Doug's Close-up pages.
- From: Bob Palmieri <rpalmier@xxxxxxxxxx>
- To: leicareflex@xxxxxxxxxxxxx
- Date: Wed, 23 Mar 2005 10:51:38 -0600
David -
My info and experience has shown that, in the main, tubes definitely
are not better.
Supplementary close-up lenses (in the preferred achromatic doublet
form) basically re-route the rays from a nearby object so as to make
them parallel (at a certain distance) so that your prime lens exhibits
the level of aberration correction it normally shows for objects at
infinity - much better than tubes in the large majority of cases.
Bob Palmieri
On Mar 23, 2005, at 10:34 AM, Douglas Herr wrote:
David Young <dnr@xxxxxxxxxxxxx> wrote:
I cannot tell the difference between a shot taken
with a good multi-element close-up lens and one taken with extension
tubes.... even though I "know" that the tubes are better.
Ain't nessesarily so... the 90 'cron shows a LOT of field curvature
with extension tubes, does MUCH better with an ELPRO.
Doug Herr
Birdman of Sacramento
http://www.wildlightphoto.com
------
Unsubscribe or change to/from Digest Mode at:
www.horizon.bc.ca/~dnr/lrflex.htm
Archives are at:
www.freelists.org/archives/leicareflex/
------
Unsubscribe or change to/from Digest Mode at:
www.horizon.bc.ca/~dnr/lrflex.htm
Archives are at:
www.freelists.org/archives/leicareflex/
Other related posts:
