[rollei_list] Re: Lens coatings and veiling flare.
- From: Eric Goldstein <egoldste@xxxxxxxxx>
- To: rollei_list@xxxxxxxxxxxxx
- Date: Tue, 7 Jul 2009 18:20:57 -0400
Interesting comments, Peter. Some of flare control inherent in design
is the number of air to glass surfaces, and also the design and
construction of the lens mount. Faster lenses are more prone to flare
than slower ones. Before coatings were around, these factors were
front and center for lens designers.
But it would be interesting to hear from Richard or other
knowledgeable parties as to whether new single coating technology is
superior to the single coating methods of the 50s... you'd think it
would be and there would be some improvement after 50+ years...
Eric Goldstein
On Tue, Jul 7, 2009 at 6:10 PM, Peter K.<peterk727@xxxxxxxxx> wrote:
> Well, IMO Van Stelten's newer coatings are better than the original,
> especially when one considers that the older one may not be completely
> intact. Just my opinion. That being said, the flare control has a lot
> to do with lens design as well. I know my Tessar handles flare better
> than my Planar or Xenotar. Not sure why, but it does. Same with some
> of the Leica lenses. Even though they were based on the Planar, the
> change in design, sometimes through the addition of an element,
> improved the way it handled flare. Why? I am not 100% certain but I am
> sure Richard can shed some light on this.
>
> Cheers,
> Peter K
>
> On Tue, Jul 7, 2009 at 10:07 AM, Eric Goldstein<egoldste@xxxxxxxxx> wrote:
>> Hi Peter -
>>
>> Not really commenting on which is better (single or multi) but
>> referencing Sander's original post asking for more modern coatings...
>>
>>
>> Eric Goldstein
>>
>> --
>>
>> On Tue, Jul 7, 2009 at 12:56 PM, Peter K.<peterk727@xxxxxxxxx> wrote:
>>> Yes, but with the age of most Rollei lenses it is a better coating
>>> (arguably) compared to one that is 50 years old. Is it worth it? Depends. I
>>> had a Rollei Wide Mutar and a Xenotar done. Both had worn coating so to me
>>> it was worth it. I did not like the color shift with the Xenotar so I sold
>>> it along with several Rolleis I had when I went through my Rollei reduction
>>> period.
>>>
>>> On Tue, Jul 7, 2009 at 9:49 AM, Eric Goldstein <egoldste@xxxxxxxxx> wrote:
>>>>
>>>> I believe John only single coats... at least this was the case last I
>>>> checked...
>>>>
>>>>
>>>> Eric Goldstein
>>>>
>>>> --
>>>>
>>>> On Tue, Jul 7, 2009 at 12:39 PM, Peter K.<peterk727@xxxxxxxxx> wrote:
>>>> > The only one I know of is Jon Van Stelten in Colorado. He will recoat
>>>> > and it
>>>> > will help if you shoot B&W. With color from my own experience you get a
>>>> > shift.
>>>> >
>>>> > On Tue, Jul 7, 2009 at 4:52 AM, Sanders McNew <sanders@xxxxxxxxx> wrote:
>>>> >>
>>>> >> I shoot a variety of older Rolleiflexes --
>>>> >> a 3.5E and a 2.8C getting most of the
>>>> >> work. Their weakness, in my use, has
>>>> >> always been veiling flare when shooting
>>>> >> a strongly backlit subject, or in other
>>>> >> conditions where the sun or a bright
>>>> >> reflection is in the frame.
>>>> >>
>>>> >> Does anyone onlist know when F+H
>>>> >> or its lens suppliers upgraded the lens
>>>> >> coatings on the TLRs? Are later TLR
>>>> >> models more effective at suppressing
>>>> >> veiling flare in these conditions? Do
>>>> >> I need to ask Austin for his GX to tame
>>>> >> this beast?
>>>> >>
>>>> >> Sanders
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>>>> >
>>>> >
>>>> >
>>>> > --
>>>> > Peter K
>>>> > Ó¿Õ¬
>>>> >
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>>>
>>>
>>>
>>> --
>>> Peter K
>>> Ó¿Õ¬
>>>
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>
>
>
> --
> Peter K
> Ó¿Õ¬
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