Dec 29, 2011

Different world of translucent mirror digital photo camera

...here is just feelings about Sony SLT-A77V camera use...

Translucent Mirror
Drive tests passed very good with filling I am a bit in a future. As A55, A77 is Translucent Miorror camera what is making photography a bit different. Process to catching even quite invisible tones became much easy, with no special lenses or/and filters.

High ISO
ISO800
I still feel that higher ISO is giving more noise on image, but 24.3MP are enough to "hide" it during post processing. the lowest ISO when noise already appeared on blacks 800. Built-in noise remover is not really blurring, and damaging image much more than can be possible to remove by Image Data Converter (in case you are shutting into RAW format). But even with high ISO some images coming very sharp with no compensation of post-processing re-size. 

Lo ISO
Ok. I was surprised about, but I feel comfortable when I have ISO50 and ISO80 in my camera. Image detail is much better with lower ISO, and amazing capture of light... this made me remember my old film camera and technical tricks I used when shut with ISO80 or 50. ...and for sure, no noise in image... 

ISO50
White Balance
Another not really good point, AWB (auto white balance). In complex (non-natural) light environment, this camera is driving very confused, and makes even much warmer colors with quite cold light existing. In this case, first in my practice, I started to use "grey cards". Not really grey, because Sony Cameras are supporting "point-to-white", so I purchased two side card (white and grey) to make pictures close to natural. Anywhere you can use any white object on a scene to set manual WB. Some basics information about white balance is here (not bad tutor by the way).

Lenses from old set
ISO200
So, I got A77V body, means no lenses. I used my Sony and Sigma lenses for tests, and was impressed by feeling that camera a bit faster than lens in auto-focus. I do not have G lenses yet, but tried once tested camera in shop. Looks like, A77 made for SSMs ;) New feature like a auto-focus and exposure track of moving subject is very impressive, but not working on simple SAL lenses well because lenses could not re-focus so fast... Time to think to upgrade my lenses set.

Art effects
Sony SLT-A77V manual art modes
Instead of automatic mode art effects with Firmware v2.0 on A55, A77 is able to process art renders during shuts. What is some times saving a lot of time, especially if you hate waste a time for post-processing. Ready to go black and white, sepia, soft light, or selected colors images can be produced in one click. the problem only in my head, I have to switch my mind to specified mode to see a scene like camera can do, before switch A77 to selected mode. 

Ergonomic
Smoking room
R1 style, good old R1. It is not only make look of A77 professional, but really intuitive and simple interface with fast access to everything. In compare with Nikon professional series, A77 gives ability to change aperture and speed on a fly, and shift both parameters increasing or decreasing aperture and shutter speed parameters together, what is making fast and easy for example background defocusing or infocusing effects to change, or decrease/increase star-effects of light sources, with no damaging of overall fixed scene exposition. (Finally) Top screen with parameters is appeared in A77, what is making easy parameters check, but really I am not "view-finder" photographer, and use it not so common.

Note
None of images here was post processed except re-sizing. 
All of sample images are made by myself here. if you need any details in "how-to", let me know.


Dec 25, 2011

Taking Brilliant Photos. Defocusing background

Taking Brilliant Photos
Technical Tips for newbie light hunters

Tip 1: “Defocusing background”

About
Sharp object of image and blurred aka unfocused/defocused background – amazing photo effect to make maximum attention to subject   of shooting. This type of shooting is useful for “close up” portraits and romantic compositions, or any images when necessary to pay attention exactly for subject of shutting, but not to scene in general.

Task
Make narrowed depth of field to get only object focused

What you need
  1. Camera with ability to switch to manual mode and lens exchange.
  2. Bright lens like with maximum aperture F1.4, F2, F2.8 (if less, harder to rich effect discussed here)
  3. Enough scene light at all, or higher subject light cover against background (in low light conditions)
Keys
  1. Keep aperture opened to maximum, align exposition by shutter speed to catch enough amount of light, or make higher ISO if not enough light of scene.
  2. Keep subject of shooting as far of background as possible to keep in focus only subject, or be close enough to subject, but keep in mind composition and natural means of light and subject position.
  3. Pay attention to lens characteristics: most of success in this method are reached with lens focal lengths about 75mm and 100mm
What to do
  1. Install lens selected.
  2. Switch camera to manual mode.
  3. Set auto focus mode to spot to avoid camera to capture unnecessary background elements.
  4. Open aperture to maximum. If you cannot reach maximum aperture supported by lens, change ISO to higher.
  5. Adjust shutter speed to make correct exposure of scene and object.
  6. Focus on object, adjust distance between camera and object (zoom in, if lens supported, or just make few steps closer), and, if not damaging your composition, move your object closer to camera far of background.
  7. Shoot.
Success scene conditions
  1. For mid and high light conditions: Background is bright enough like shiny water, bright walls, etc.
  2. For low light conditions: Background is dark enough, but focused object is in enough light

What to understand
Lager aperture produces narrower depth of field. Lenses of longer focal lengths a much more capable of producing narrowed depth of field. So, depth of field is golden key for this method, and aperture and focal length of lenses are major “instruments” to reach this effect.

Feb 13, 2011

RE "Wi-Fi service can expose your really sensitive data to cybercriminals"


This short article is "non-panic" class of material referenced to Kaspersky Lab article WiFi + Airport = Lost password
We left following comment for this article on www.securelist.com
Just opinion...
Wireless connection or wired... Secured traffic is secured traffic. If you talking about security and exposed credential, it is no matter what "last mile" do you have. People, who are hunting, personal credentials, encryption certificates and so on, will do their job even with your existing VPN (pairing traffic for PKI extraction for example, especially on M$ Windows platforms).

It is just talking about egg and chicken. So, if KaspLab placed egg affront and says "this is solution" (making money BTW), why not?

low level education in IT security of regular users is just a reason to have such of product on-board of their laptops, PCs, etc. It is kinda business, is it?

Simple solution is:
1. Enable firewall on your netbook/laptop/PC, and carefully research what traffic do you use, and what is necessary to pass in and out (DO NOT TRUST wizards of any firewall software, each wizard leaves back-door for "technical" reason even KaspLab products)
2. Be aware of what you gonna explore in Internet. Even you have super cool antivirus or any security enabled controlling software, this will not warranty that you will not get trojan-style virus, or rootkit, or fake login pages or any related which may be not yet recognizable by installed antivirus on your HW.
3. Even you have simple and proved traffic protection on your PC, you are not protected. Your PC is your PC, but rest of the world is opened even you are protected incide of your PC. Strong advise of ANY more less in mind security specialists — change your password, do not be lasy, change your personal credentials frequently (once a week, once a month, once... as «once» as possible)
4. Do not use M$ products. Tobe honest, it is rare situation that commercially delivered operating system is most patched, even KspLab products just developed as extension of file system interfaces, networking interfaces (as patch alternative of own M$). Did you think ever why? So, try alternative OSs, and enjoy most virus-free and stable user environments.
5. If you have business needs to access to your banking or incorporate resources, the best solution is to use dynamic encryption of traffic access for VPN access on numbers of ports (even on HTTP, HTTPS). What is dynamic encryption? It is mostly hardware implemented pass phrase generator for access to remote secured areas via VPNs. Yes, yes, VPN ports can be blocked, ask sysadmins to add for binding additional ports that can be available anywhere.
6. Never, never and never exchange your e-mails WITH NO SSL/TLS encrypted connection!
7. Do not afraid to use open Wireless networks – no difference in general will you use WiFi, GPRS or HSDPA.

Again, this is just opinion.

Feb 8, 2011

Wi-Fi Roaming, Solution Overview

Hi falks!
We have started to release documents and specifications derived from our past projects to PUBLIC. Even documents are exposing on public, we still own those solutions and techniques. So, be kind, to tell about us first before try to implement it somewhere. This way will help you to get low-cost or free support on your projects.

Here is our first fly "Wi-Fi Roaming, Solution Overview" one of 100 presentations explaining how some of our solutions are working.

Any comments are welcome.