Archived posting to the Leica Users Group, 2015/05/10

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Subject: [Leica] Bat Bending Strength: The Ted Gran Effect? - FRANK
From: jhnichols at lighttube.net (Jim Nichols)
Date: Sun, 10 May 2015 14:36:20 -0500
References: <CAAsXt4MZ60fFevjVQfC8cR3goEo8kj6vnvBKicSjdfCUP_xujQ@mail.gmail.com> <75914ED0-FDFC-44B0-910B-0F9AA473FB9C@sfr.fr> <554F84C5.8090300@lighttube.net> <27B6238A-7208-4E8D-9BB7-F8E6219D4CD0@sfr.fr> <004101d08b4c$ba264530$2e72cf90$@verizon.net> <CAAsXt4PTe+v5tggwd8RGmxZq0Gt=ZfxZn3GfgdjRyb3H7E7WHQ@mail.gmail.com> <2C053052-D077-4A33-BE8D-19AF50AD0262@sfr.fr>

Seems as plausible as any.

Jim Nichols
Tullahoma, TN USA

On 5/10/2015 2:33 PM, Philippe wrote:
> contrary to mechanical shutters where the slit is either vertical or 
> horizontal, e-shutters act like BOTH vertical and horizontal curtains at 
> the same time - they record points, not lines
> they scan one line after the other
> at the next line, ultra fast objects have actually moved one block further
>
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> ChronophotograPhilippe
>
>
>
>
>> On Sun, May 10, 2015 at 11:11 AM, Frank Filippone <red735i at verizon.net>
>> wrote:
>>
>>> You are overthinking the solution.
>>>
>>> A vertically moving shutter, at 1/1800 ( usually this starts around 1/125
>>> of
>>> a second, depending on the camera) of a second uses a SLIT to allow light
>>> to
>>> reach the "film".  So the bottom of the film and the top are actually
>>> exposed at different times.
>>>
>>> Marry that fact with a fast horizontally moving subject, and you get
>>> ovalized race car wheels, elongated race cars with funny angles in them,
>>> and
>>> baseball bats that bend.
>>>
>>> In the past, with horizontally moving shutters ( Film Leicas for example)
>>> the effect was quite common and exciting.
>>>
>>> I guess the "Kids" around here have never photos from the 30's and 
>>> before (
>>> think Speed Graphics, which did have a vertically moving slit shutter) 
>>> with
>>> the same effect.
>>>
>>> Nothing is really new, just new to the beholder.
>>>
>>> Frank Filippone, showing his age.....
>>> Red735i at verizon.net
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In reply to: Message from rgacpa at gmail.com (Robert Adler) ([Leica] Bat Bending Strength: The Ted Gran Effect?)
Message from philippe.amard at sfr.fr (Philippe) ([Leica] Bat Bending Strength: The Ted Gran Effect?)
Message from jhnichols at lighttube.net (Jim Nichols) ([Leica] Bat Bending Strength: The Ted Gran Effect?)
Message from philippe.amard at sfr.fr (Philippe) ([Leica] Bat Bending Strength: The Ted Gran Effect? - JIM)
Message from red735i at verizon.net (Frank Filippone) ([Leica] Bat Bending Strength: The Ted Gran Effect? - JIM)
Message from rgacpa at gmail.com (Robert Adler) ([Leica] Bat Bending Strength: The Ted Gran Effect? - JIM)
Message from philippe.amard at sfr.fr (Philippe) ([Leica] Bat Bending Strength: The Ted Gran Effect? - FRANK)