[Leica] 28 Summicron and IR hotspot... on film

[henningw at archiphoto.com (Henning Wulff)]

I've heard about it, but never experienced it myself. I've shot a lot 
of HIE in M4's; in fact for many years I had one dedicated to it. I 
once tried leaving an M4 with a Summicron wide open and no filter 
pointed at the sky for a day. No fog.

I have however experienced hot spots with some lenses.

As for SLR's being popular for HIE, they're certainly exceedingly 
clumsy, what with having to take off and re-install the filter for 
every shot since you can't see or focus through them. Rangefinders 
have always bee the better option.


>Are you implying that it occurs before the exposure through the
>shutter curtain? That's news to me...
>
>On Thu, Apr 16, 2009 at 10:20 AM, Slobodan Dimitrov
><s.dimitrov at charter.net> wrote:
>>  It's prevalent to rangefinders, as they have no mirror to act as a 
>> baffle.
>>  That off course excludes the Nikon SP, of which the latter run used a 
>> metal
>>  shutter.
>>  It's one reason why usage of HEI took off when the SLR came into use. The
>>  japanese SLRs that is.
>>  A friend, back in the early 70's, converted an M4 to a metal shutter 
>> curtain
>>  for that very reason.
>>  It wasn't cheap, even by the neolithic economics of that era.
>>  S.d.
>>
>>
>>  On Apr 16, 2009, at 6:41 AM, Tim Gray wrote:
>>
>>>  Well I've heard lots about hotspots on digital cameras but never on
>>>  film.  Which was why I asked.
>>>
>>>  If you don't want that HIE, I might be interested :D
>>>
>>>  On Thu, Apr 16, 2009 at 7:26 AM, Marty Deveney <benedenia at gmail.com>
>>>  wrote:
>>>>
>>>>  There is some useful anecdotal info from the M8 here:
>>>>
>>>> 
>>>>http://forum.getdpi.com/forum/showthread.php?s=26793094e0d9c5042ed22f16ba1a86a8&t=257which
>>>>  will apply equally to HIE or other very IR sensitive films.
>>>>
>>>>  I have used a lot of HIE in the past and still have a brick frozen, 
>>>> but I
>>>>  think I'll need to use it soon.
>>>>
>>>>  Marty

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