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 18:15:44 -0500
References: <8f5413a60904150646i1450cd36ne150958ccf03f8c9@mail.gmail.com> <A44964CD-81D7-490F-861A-927B4BE40D99@verizon.net> <D7ECA676-6A7A-41F2-A07B-CC7257935EBB@charter.net> <8f5413a60904151500r1f54154fof925a14ec707a5da@mail.gmail.com> <BDA8A5DD-4F9C-4AF4-8F24-AEBAD9CE977B@mac.com> <8f5413a60904151543p2c3a084fj981b57e3275c44af@mail.gmail.com>

got it
makes good sense

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 5:43 PM, Tim Gray wrote:

> I guess I could.  But then I though, "If I'm going to shoot ~40 rolls
> of film that is going for ~$40/roll on ebay, why not spend the extra
> $40 and just buy a 39mm IR filter?"  The real reason is because the CV
> 28/3.5 with filter and hood doesn't obstruct the viewfinder, but with
> a step up ring and filter, it would, and I wouldn't be able to use the
> hood.
>
> I also have a 90 that takes 39mm filters, so with two sets of filters,
> all my lenses are covered.
>
> On Wed, Apr 15, 2009 at 6:04 PM, George Lottermoser  
> <imagist3 at mac.com> wrote:
>> 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.
>>>> See http://leica-users.org/mailman/listinfo/lug for more  
>>>> information
>>>>
>>>
>>> _______________________________________________
>>> Leica Users Group.
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>>
>>
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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)
Message from imagist3 at mac.com (George Lottermoser) ([Leica] 28 Summicron and IR hotspot... on film)
Message from tgray at 125px.com (Tim Gray) ([Leica] 28 Summicron and IR hotspot... on film)