Thursday, January 26, 2012

Monday, January 16, 2012

Sony, listen!

Your are providing such delicious cameras! And then this: Only tiny mini flashes, tied to the camera like a swimwear preventing to wear the winter coat.
What can YOU do ?
Very easy - provide one additional item within the menu system, to enable the choice between the current modes versus elimination of the "E-TTL" preflash. The most obvious place would be to extend the current flash selections for this function.
In addition, to combine this with lowering the flash output would be nice, but no prerquisite.
Aim: Permit hassle-free use of master-slave flash arrangements with NEX-3, -5, and 5N.
Don't be shy! You are certainly reading forums. You know, that this is an item coming up again and again! Just a tiny update to the firmware. Come on!

Friday, January 6, 2012

DANGER! HIGH VOLTAGE!

SAFETY PRECAUTION - http://www.repairfaq.org/sam/safety.htm
The Main Capacitor in any Flash bears high voltage of a few hundred volts, even when disconnected already for a while !  An even higher voltage will be present inside the flash, when the flash gets ignited. If you do not know, how to discharge the main capacitor correctly, please do NOT open up a photo flash !

Thursday, January 5, 2012

Lack of flash for - Macro, Studio, wireless, distance, natural lighting, experimental...

We can find an awful lot of forums within the internet, dealing with photos and cameras. When it comes to the Sony NEX camera, for all models but the NEX-7, we find in every forum, and in each several entries, again and again complaints about the restrictions of the flash, caused by purpose in its design. Such a great camera, with such a poor design! Maybe Mr. Braun can put an end to this misfortune, by following his own sample, as shown here. Mr. Braun, listen, please.



Please read also the next entry "Purpose".

Purpose

The language.
As you can read, my native language is not English. Sorry for the English natives, but your language is the only other one I know a bit, and it is understood all over the world. Hopefully.
The aim
is to bring people and information to one place, together we are very strong and can solve any problem. I have tried this on a forum, but there you have always at least one person destroying any effort.
Your support.
Please use the comment button and tell me what you know (in English or German), what link you know about either English or German pages. Actually it is not a button, but the written word "comments" at the end of each entry. Alternately, if you prefer you can send me an eMail, use the address given on this page, up and to the right.

My role.
Trying to document and coordinate.
What kind of people - some know technical details, some know practical use, some know howto....
One solution, two marketing methods:
The solution can look similar to the "Polaroid with Braun-Flash" as shown here, the (marketing-)method can be either standard route by manufacturing/dealer or by DIY not excluding the kitchen table, or a combination of both.
Possible scenario.
You are taking pictures with your NEX at a marriage, you need to use the flash, and you are not the only person taking photos. That's just to prevent you from telling some of the many workarounds which are flooding the net, and are of no help in this case. One possible workaround is to encapsulate the existing flash with a slave sensor, this works on an experimental level, the reliability too low.

Status of knowledge to me:
I'm willing to learn that I'm wrong, when I get corrected. The following is not my invention but what I read on the internet.
The firmware has not been disassembled till now, there are no third party firmware modifications available.
Every solution needs to be based purely on hardware.
Beside the offerings from NEX, there is no third party solution available.
Currently there are two versions of a flash available for the NEX cameras:
HVL-F7S   Standard with the NEX
HVL-F20S  Additional Option
The guidenumbers are a bit misleading, but this is not my subject here. Both need to be mounted directly to the camera, fastened by a thumb screw with a thread of standard M2.5 (x 0.45, or 3-56 ISO), contact is made by a proprietary tiny 14pin connector. Logical ground is on pin 4 and 12, pin 5 is the "SYNC" signal, coming directly from the CPU, and needs to be amplified before representing F1.
Sony uses Rohm 2SC4505T100 (400V, 0.1A), SYNC>R10k>Base, Base>R47k>LGND, Emitter>LGND and Collector>F1.
Processor: Toshiba TMP19A44FDAXBG. According to Toshiba:
The TX19 is a family of Toshiba-original 32-bit RISC processors featuring the speed of MIPS32ISA with the added advantage of a significantly reduced code size of the MIPS16eISA.
Source Code: Sony Global - Source Code Distribution Service

My idea is to modify the little HVL-F7S to change its behavier (controllable by a switch if possible) to
   emitting no light
   Faster repeat cycle
   providing a PC-output connector


Links

Information, discussion
  Inside NEX-5
  Inside HVL-F7S
  Hotshoe 1
 
How stuff works
  Basics
  Sample Wirings
more links

  http://www.next.gr/uploads/133-f49a7a0394.gif
  http://www.discovercircuits.com/DJ-Circuits/airmon2.htm
  http://www.next.gr/video/photo-flash/
***  http://www.repairfaq.org/sam/strbfaq.htm
  http://www.mikrocontroller.net/attachment/47666/studioblitz.gif
  http://www.restautron.de/home/s_pl1.jpg
  http://www.mikrocontroller.net/topic/157227

Technical data
  from (http://www.mi-fo.de/forum/index.php?s=11f571ba51cf957e6cbadd66c8144f59&act=Post&CODE=02&f=272&t=28004&qpid=274992)
http://www.mi-fo.de/forum/index.php?showtopic=28004
    Pin layout

Sources
  RS
  http://uk.farnell.com/
  http://cpc.farnell.com/

Workaround
  Rubberband
  How to use remote flash with Sony NEX-5 (& 5n and 3 and c3)
    http://karaatanasov.info/index.php?entry=entry111229-221046
  http://www.dyxum.com/dforum/hotshoe-adapter_topic82538.html
     http://karaatanasov.info/index.php?entry=entry111229-221046
_

About

This pages are purely for private use and hobby, there are no commercial intentions. Most information found here is just copied or provided through a link, that means I have no rights for it, and is provided for private use only. My own ideas may be used freely by anybody, within any further documentation this statement must be attached clearly readable.
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