E20.      ...  I am certainly concerned here with practical usage exploiting these ideas,  than for a mere affinity towards  science or for the  thrill of attaining a technical-feat, to brake the persisting speed barrier of 1/250’s (with relevance  to flash synchronization)the limitation we have set till now for an un-explained reason.

..Is that a new design of a shutter – is required in-order to apply flash selection?.

Not really, the alternative options are described just above.

E21.          ..  But below is explained the better attributes of the shutter of what my design would posses.

E22.       The most important features are “a high speed shutter & the sync at all speeds, it can operate in a  smoothness for  multi -exposure mode”.  In saying so I emphasize that the above could execute  better creativity important in it's function than features like, say an Auto-focus, frames capture/sec; Advanced metering or the latest avatar of face detection or even the Image stabilization, meant for a dedicated photographer

**for those who wish to clarify what a “creative tool “would mean, I am eager to discuss them in the future

a) It would enable many photographers who could not afford high end flash system.

b) One could travel light weight.

c) The placement of light could now be, even in the field of view and better control on lighting.

d) The Maintenance / service cost would drop down exponentially, with simple flash units.

e)You would be seen as a more proficient photographer, at the shooting spot (the most  important factor to an Art Director).

E23.          About the shutter & what it can perform

a)   As shutter with regular speeds as well as a high speed shutter

b)   A Complete flash sync at all speeds

c)    A feather-touch multi-exposure

d)   Two phase exposure mode (explained later)

e)   As an all-efficient lens hood + lens protecting gear.

f)   It could be mounted on an analogue and digital cameras of the present.

g)   It facilitates to create software logic for selection tool in image editing package.

E24.      ... It could be designed to be made to a Universal size, to fit on lenses of various diameters. As an added functionally it is an innovative lens hood to cut down glare most effectively and as a lens protective gear.

E25.      ...    And then it also happens to be a soft shutter mechanism due to it’s inherent design advantage.  It would facilitate a multi exposure at any multitude, to become  a feasible option.  I do not discredit the efforts taken by others and those mechanisms that have been effectively implemented in a modern camera. They are meant to subdue the vibration due to shutter and mirror mechanism. But I wish to state that the issues of shutter vibration, the cocking of shutter does not arise here in the first place with this shutter type  of new idea.

E26.      ...   In short it is a Novel Shutter Mechanism, comes as a solution to provide a complete sync in the region of 1/4000’s or beyond (apart form all regular speeds), along with a Feather touch  multi exposure feature,  that can  be acquired to any camera (old or new).

..  Does it Signals that I have exclusively taken on issues of High-speed Flash-sync?

E27.      .. It is not true either. I have mentioned earlier and here below, that  deals with Tungsten, Light Reflectors  of lower shutter speeds as well. But fact remains that we have made only a small progress in that area (flash sync), for a long time. For e.g.; A Nikon F model introduced in the early years of 1959 had a sync at 1/60th sec., .I mean we have progressed only two incremental steps to 1/250th sec., for all these, almost an half a century . Could I safely assume R&D's of camera companies intending to bring about a change in shutter in future, which could be performed by electronics rather than physical form the blade shutter we have had always seen?. Incidentally I have solution where a shutter could perform flash-sync @ High speed as well as multi exposure.

  How to _flash select

E28.       .. This Reference lighting usually from a flash is either added up as an additional filler-light to the primary or be deducted from the 'Primary'. The alternative light source could be a tungsten or Day Light.  But a flash is chosen for its special properties (as reference lighting). The general usage of flash as we know is, for its ability to serve as the main source of illumination, when the lighting from other sources (e.g.: sun light or tungsten light at indoor) is insufficient for an exposure.  The flash is also used for the purpose of filler even on a sunlit-outdoor condition.

E29.        In general, the required shutter speed to synchronies would vary between 1/30^th.sec to 1/250^th.sec. OR faster. Unfortunately 1/250th. sec: is the maximum sync speed that too only limited to a few of professional 35mm SLR cameras. A Higher end Leica SLR provides much higher sync speed, but on a twin flash configuration. What it also means is that an extensive a work on flash synchronization, and its implementation, is yet net been worked-out/ achieved. That too not yet accommodated, in a simple affordable camera.

E30.       ..We usually Select a shutter speed for a flash fill  which is based on the intensity of the prevailing light and as well as to complement the aperture chosen,…. apart from consideration of the speed of film used,… the distance between the flash and the subject …the flash power etc.,      

E31.        .. It  is feasible, even  with a low powered flash and that if, the flash is made to synchronize at 1/1000th sec., or faster, we could then over power, even the harshness of a strong sunlight  (i.e.,here a light from  a flash is  simulated to  gain prominence / dominance as a source of light, than compared to the strongest  one the sunlight by simply controlling the shutter speed alone).  Meaning that a change of given shutter speed would have it's influence, only on the sunlight. where as the light output from a flash or we call it the flash power is not all altered / controlled.

E32.       .  This could be demonstrated by taking a series of exposure by progressively varying only the shutter speed on every proceeding (subsequent) frame with flash photography. During these exposures the position of the camera, aperture, the flash and its power were kept at constant. Then the prints were made so the foreground objects are printed in a comparable brightness. When these prints from series of frames, are compared, the inference would show that only the background has turned out to be darker in relation to the foreground, the more so with an increase of shutter speed.  Where as the foreground in comparison would remain as the same in brightness,  throughout this series. Because the foreground (of near distance) is more easily influenced by the reachability of the lighting power of the flash. But the background had become darker because  the intensity of the light from the flash would get-gradually fade out with the increase of distance.  Therefore it could not able to influence the exposure corresponding to the area in the background

E33.       ..This pattern of occurance of  receding variation , would also mean, a corresponding difference in the density value between foregrounds vs. background in an exposure.   More importantly it has capability to show an of effect of isolation between foreground VS background greater a degree when high speed sync is chosen.  We can make use of this property to compare the images derived by the 'Primary' and the 'Reference' lighting, on which we have exclusive interest,(which favors the technology of Flash-Selection).

E34.       ..The isolating effect between the elements of foreground and the background is utilized here to transform it into a tool meant for selection technique, in Image Editing. The selection has the ability not only to achieve various kinds of  visual /special effects in photography but also to gain control over  various lighting condition on a travel,  wild-life, with in a factory site etc.,.  I have suggested sync at such a high shutter speed, only as a preferred means in an eventuality of when we happen to face an  adverse lighting conditions of harsh / strong sunlight.  This is the reason why I wish that a sync facility should be extended to a speed as high as 1/4000th.sec.to be made available for any  camera universally,  but not on a bargain of extra money for the feature added, as it is for a noble course pertains to photography.

E35.       ..The 'Reference' light as mentioned earlier could also be derived through the influence of reflectors which are generally used at out-door shoot. The technique could also be implemented with a tungsten lights, especially also when the 'Primary' is predominantly by tungsten illumination. But in both the cases (of reflector or tungsten), instead of addition of lighting, the lighting that we had intended to contribute to Ref: light could also be is deleted (switched-off) from the 'Primary'.