Re: The Wardian Case

[Michael Volow <mvolo@acpub.duke.edu>]

Is it possible that the black coating wearing of the diaphragm leaves 
aggravates and increases internal reflections contributing to flare? I'll 
have to see if my DR Summicron has flare sootihg directly into the sun.

 On Wed, 5 Jun 
1996 gosfield@dolphin.upenn.edu wrote:

> Date: Wed, 5 Jun 1996 07:57:11 -0400 (EDT)
> From: gosfield@dolphin.upenn.edu
> To: leica-users@mejac.palo-alto.ca.us
> Subject: The Wardian Case
> 
> since folks are still reacting to Fred's post may i briefly offer the 
> following suggestions:
> 
> 1) personal criticism does not belong on the list.  period. Criticism of 
> arguments, points, accuracy of "facts" etc, is of course part of the 
> essence of the list.
> 
> 2) if we use the same tone of 'voice' we would use in face to face 
> contact i think we can't go far wrong
> 
> 3) No one here has any 'reputation' or 'face' they need to defend.  It's
> just a buncha electrons in space, put there by folks you have never met.
> No one on the list is able to control or injure any one else even if
> they want to.  I am amazed at how defensive we (I certainly include
> myself) can get about messages from strangers, expressed off the top of
> the head, in a medium of exchange devoid of body language, tone of voice,
> inflection, facial expression, and all the other forms of linguistic
> information and physical interaction which humans find necessary to
> successful conversation. When i am tempted to reply in anger, i just save
> the letter off line and look at it the next day, to see if i still want to
> send it.  So far i haven't sent any of 'em...but i sure wrote a bunch ;^)
> 
> 4) I wouldn't even bother posting these suggestions, since we are all 
> aware of this stuff, but the tone of a list is the sum of the comments on 
> it, so here is a vote for peace and (good) light. This will all wind down 
> in a couple of days and we will get back to more important matters.
> 
> 5) I hope everyone will post everything they want about every Leica
> subject that interests them.  Personally, i am most interested in how
> people use their Leicas to take pictures, and how they have learned to
> make their pictures 'better', and what 'better' means to them, and how, if
> at all, the Leica has specifically contributed to this. 
> 
> -------------
> 
> And to get back to more important stuff--has anyone been successful at
> shooting directly into the sun with a NF 50mm Summicron?  I had problems
> in Joshua Tree shooting a sunset with clear sky (Kodachrome and Technical
> Pan) and backlit foliage, using a lens hood and no filter.  Lots of flare
> (large areas of decreased density in color, increased neg. density in B&W)
> but no ghost images.  My Summicron is a 1964 model, as someone on the list
> kindly informed me. It has no haze, separations, fungus, or other 
> internal problems i am aware of, except for most of the blacking having 
> been worn off the (front side) of the iris leaves.  It seems to work very 
> well indeed when i don't point it at the sun, and is very contrasty and 
> sharp on high contrast subjects. 
> 
> I have used a 28mm Nikkor into the sun with less of this problem (a single
> 'ray' of flare, probably from a filter, but no overall flare).  My Zeiss
> 80mm Planar (Rollei SL66) has a similar flare problem, and is of the same 
> vintage as the Summicron. 
> 
> What are the particular features of the Summicron which produce this
> effect, and how 'close to the sun' have others been able to shoot? 
> 
> 
> best wishes to all,
> 
> ted
> gosfield@dolphin.upenn.edu
> 

Michael Volow, M.D. (mvolo@acpub.duke.edu)
Department of Psychiatry, Durham VA Medical Center, Durham, NC
919 286 0411 Ext 6933