Archived posting to the Leica Users Group, 2009/04/15

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Subject: [Leica] 28 Summicron and IR hotspot... on film
From: imagist3 at mac.com (George Lottermoser)
Date: Wed, 15 Apr 2009 17:04:31 -0500
References: <8f5413a60904150646i1450cd36ne150958ccf03f8c9@mail.gmail.com> <A44964CD-81D7-490F-861A-927B4BE40D99@verizon.net> <D7ECA676-6A7A-41F2-A07B-CC7257935EBB@charter.net> <8f5413a60904151500r1f54154fof925a14ec707a5da@mail.gmail.com>

why not just get a step-up ring?

Regards,
George Lottermoser
george at imagist.com
http://www.imagist.com
http://www.imagist.com/blog
http://www.linkedin.com/in/imagist

On Apr 15, 2009, at 5:00 PM, Tim Gray wrote:

> Hmm.  That's interesting.  I've seen very little about hotspots on IR
> film, but I guess it does happen.  Oh well.  Time to look for a 39mm
> IR filter - I'll just shoot with the CV 28/3.5, which had better NOT
> have a hotspot :)
>
> Not that it's that interesting to most since they no long make HIE,
> but I'll going to run a test soon with the lenses I have to see which
> leave a hotspot on film, at what apertures.  I'll also try to get a
> handle on the focus shift...
>
> On Wed, Apr 15, 2009 at 4:54 PM, Slobodan Dimitrov
> <s.dimitrov at charter.net> wrote:
>> I've also had a hot spot with a 35mm.
>> S.d.
>>
>> On Apr 15, 2009, at 1:29 PM, Leonard Taupier wrote:
>>
>>> Tim,
>>>
>>> The 28mm Summicron is known to give hotspots when shooting IR,  
>>> film or
>>> digital.
>>>
>>> Len
>>>
>>>
>>> On Apr 15, 2009, at 9:46 AM, Tim Gray wrote:
>>>
>>>> So I shot some HIE the other week, and to my surprise, a lot of the
>>>> frames have an IR hotspot in the middle of the frame. I've heard  
>>>> this
>>>> happens with digital and some lenses, but had never heard of it
>>>> happening with film.  I was using my 28 Summicron with an R72  
>>>> filter.
>>>>  Anybody else have this occur while shooting film?
>>>>
>>>> _______________________________________________
>>>> Leica Users Group.
>>>> See http://leica-users.org/mailman/listinfo/lug for more  
>>>> information
>>>
>>>
>>> _______________________________________________
>>> Leica Users Group.
>>> See http://leica-users.org/mailman/listinfo/lug for more information
>>
>>
>> _______________________________________________
>> Leica Users Group.
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>>
>
> _______________________________________________
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Replies: Reply from tgray at 125px.com (Tim Gray) ([Leica] 28 Summicron and IR hotspot... on film)
In reply to: Message from tgray at protozoic.com (Tim Gray) ([Leica] 28 Summicron and IR hotspot... on film)
Message from len-001 at verizon.net (Leonard Taupier) ([Leica] 28 Summicron and IR hotspot... on film)
Message from s.dimitrov at charter.net (Slobodan Dimitrov) ([Leica] 28 Summicron and IR hotspot... on film)
Message from tgray at 125px.com (Tim Gray) ([Leica] 28 Summicron and IR hotspot... on film)