Monthly Archives: June 2014

Saivam – Movie review


The film is mainly concentrated on three characters Kathiresan (Naseer ) and his Granddaughter Tamizh(Sara ) and her pet Rooster Pappa . Kathiresan is expecting his sons and daughter along with their family for the village festival. Kathiresan is overjoyed at having his entire family of three sons and a daughter under one roof, but that joy doesn’t last as unfortunate events occur in the family. When the family finds out that a Nerthikadan (promise of an offering to God in return for a favour), which was giving the “Pappa” the Rooster as an offering to their God was long overdue. But things get even worse as the Rooster goes missing. How the family recuperates after this is the rest of the story.

A clean, fun filled melodrama given by Vijay and his team. Vijay has managed to choose the best of the cast for this film, the boy Shravan (Ray paul) , George and Malathi the house servants where too good. Naseer and Sara lived like the character for the film. Songs and background score where presented. Selva ‘s art direction blended to the story and essence of Karaikudi was not lost in any frame.Clean dialogues and light hearted family moments makes this simple story and good movie.The only miss was the duration of the film but being a family drama maybe it needed the extra length. A big round of applause for the whole team to have given a complete family film. I give the film 7/10


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Posted by on June 30, 2014 in Movie Review


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Transformers: Age of Extinction – Movie review


The story starts five after the battle of Chicago between the Autobots and the Decepticons , which left thousands of humans dead and the city devastated. This lead to the break of alliance between the humans and the Autobots . An elite team of CIA agents lead by Harold Attinger(Kelsey Grammer)is formed to hunt the surviving Autobots and shut them down. Little do the government know that Harold has joined hands with an intergalactic bounty hunter named Lockdown , who wants Optimus Prime in exchange to the Seed with which he can create “Transformium “ to create his own Transformers to eventually be used for Military use .

This is the worst Transformers movie ever. It goes on and on and never ends, I actually got up twice after two actions sequences thinking that the movie is over. While the 3d and the effects are totally good it’s not new since we have seen that in the last three movies. But the Dinobots are to look out for in the film, that was really creative. All human characters just lengthen the duration of film and not much of use in the story . Movie is more for the fans and not for the common audience .Michael Bay is the only Director who can make four movies with the same storyline . I give it 2/10


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Posted by on June 28, 2014 in Movie Review


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Vadacurry – Movie review


Satish ( jai) who comes from a lower middle class family, has just landed up in a job as a medical rep. He is brought up by his brother an auto driver who he treats as a godly figure. Satish who wants to lead a simple life is constantly teased by his friends and colleagues that he has a very cheap mobile, he is  told that to lead a life of dignity and to get a decent girlfriend he has to change his mobile at what ever the cost maybe. When he comes across a unattended IPhone in a tea shop , he pockets it ,little knowing that it belongs to drug related gang leader. How his life changes after this forms the rest of the story.
The title Vadacurry  represents nothing but just that this film has all types of emotions mix together. The first half just takes you into the life of Jai and it just roams vaguely without a story. The casting is fine but I don’t know why it’s always crowded in all scenes. RJ Balaji who acts as Jai’s friend in the movie is a constant irritation in the film, he even delivers half of Jai’s dialogue in the film. Swathi who comes has the love interest of Jai in the film doesn’t have any scope in the film, but has done her part. Jai has not improved from any of his previous films, he just doesn’t deliver any kind of emotions on screen . Music is a good attempt by the debut music directors but they still have long way to go. This vadacurry is a bland one. I give it 3/10


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Posted by on June 23, 2014 in Movie Review


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Manual Photography Cheat Sheet – For all Shutter bugs


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Posted by on June 17, 2014 in Technology


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Mundasupatti – movie review


Another short film transforms into a film.The year is 1987 in a village called Mundasupatti a village drowned in superstitious and mis belief by circumstances and forces of nature. They photograph only the dead and pray a piece of meteor stone as god. Our hero Gopi ( Vishnu ) who owns a photo studio in the name of Hollywood studio. He along with his assistant Azhagumani (KaaliVenkat) are summoned to the village to photograph the village head man who is on his deathbed.There Gopi falls in love with the granddaughter of the village headman Kalaivaani (Nandita), but dreams are shattered when he comes to know that she is also engaged and soon to be married to her relative.He plans to see her again when delivering the photo and express his love, when the photo turns unexposed he is devastated. How he manipulates the villagers and also marries the girl is the rest of the story.
A clean and well executed film by the whole team. The cast is well chosen and everyone delivers their given task equally.the team has spent time and energy to took us back to the late eighties and narrated a good comedy drama for the whole family. Vishnu and Kalli Venkat duo was flawless both their performances are good . Special applause to Ramadoss who plays as Muniskanth , who’s antics was exaggerating but provided good laughs throughout. Even though the movie was predictable it was well executed.The only flaws were the duration of the first half and lack of interest shown in the romance scenes. I give it 6/10


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Posted by on June 15, 2014 in Movie Review


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Where do those “F/stop” numbers come from?

Photography Tutorial:

Where do those “F/stop” numbers come from? (detailed explanation)


The camera lens transmits a circular image that completely covers the camera sensor. The area of a circle is calculated by taking the pure number Pi (approximately 3.14 and pronounced like cherry ‘pie’) times the radius squared. When we square a number, that just means to take the number and multiply it by itself. Four squared means 4 * 4, which equals 16. 10 squared means 10 * 10, which equals 100. The number Pi is a pure number (without any units) and never changes.

Area = (Pi) * (radius) * (radius)

The radius of a circle is the length from the center of a circle to the circle itself. The diameter of a circle is the length from one side of the circle to the other side, passing through the center. Obviously, the diameter of a circle equals exactly twice the radius.

So, let’s calculate the area of a circle with a radius of 1 unit (millimeters, feet, miles, doesn’t matter):

Area = (Pi) * (radius) * (radius)

Putting in our numbers, this gives us:

Area = (3.14) * (1 unit) * (1 unit) giving us 3.14 square units. This will be our starting point.

Now, if we want to double the area of a circle, what can we change? The number Pi never changes so the only thing we can change is the radius of the circle. Our first thought might be to simply double the length of the radius to double the area of the circle. Let’s see how those numbers come out:

Area = (Pi) * (radius) * (radius)

Area = (3.14) * (2 units) * (2 units) – giving us 12.56 square units. Wow! That’s 4 times the starting area, not twice. Now, we could try guessing a few times using a calculator to get close to a final area of 6.28 (twice our starting point area) or we can figure it out mathematically. Or I can simply tell you that the answer is the square root of 2. What’s a square root? Earlier, we said that a number squared means to take a number and multiply it by itself. A square root is going the other direction. It means you start with a number and figure out what other number, when multiplied by itself gives you the starting number. So the square root of 100 would be 10 (because 10 * 10 = 100) and the square root of 25 would be 5 (because 5 * 5 = 25).

So what is the square root of 2? It is approximately 1.414. The number actually continues on forever past that (1.414213562…) but let’s just use the 1.414 part.

Go ahead and get out your calculator. I know you’re thinking you’ve got to check it yourself. That’s ok, I’ll wait.

Check out ok? Thought so.

Area = (3.14) * (1.414 units) * (1.414 units) gives us 6.28 square units. Now THIS is twice the area of our first circle. So what happened to the diameter in this exercise? In the starting circle, the radius was 1 unit which makes the diameter 2 units. In our second circle, the radius was 1.414 units so the diameter would be 2.828 units. The diameter increased by the same factor as the radius, ie, radius 1 to 1.414 and diameter 2 to 2.828. Increasing the diameter by the same square root of 2 value doubles the area of the resulting circle. The diameter of the opening through which the light is transmitted is the actual Aperture measurement.

So, what can we conclude? We can conclude that each time we want to double the area of a circle, we need to increase the radius (or diameter) of the circle by a factor of the square root of two (multiply by 1.414…).

What happens if the focal length of the lens and the aperture values are the same? Let’s start with a 100mm focal length lens and give it a 100 mm aperture.

As we know, F/stop = (focal length) / (aperture) so the F/stop in this example would be:

F/stop = (100 mm) / (100 mm) – which gives us that magic value, F/stop = ‘1’.

The area of this aperture opening equals (Pi) * (radius) * (radius) or:
(3.14) * (50 mm) * (50 mm) = 7853.98 sq mm

Now let’s start decreasing the diameter (aperture) by that square root of two value (to cut the area of the circle in half) with this lens and see what happens.
Remember, each step will divide the diameter by 1.414 to get the next diameter or Aperture value:


Aperture Area Radius (focal length)
(mm) (sq mm) (mm) (aperture)
100.00 7853.98 50.00 1
70.71 3926.99 35.35 1.41
50.00 1963.50 25.00 2.00
35.35 981.75 17.68 2.83
25.00 490.87 12.50 4.00
17.68 245.44 8.84 5.66
12.50 122.72 6.25 8.00
8.84 61.36 4.42 11.31
6.25 30.68 3.13 16.00
4.42 15.34 2.21 22.63
3.13 7.67 1.56 32.00

So, do the numbers in that last column look familiar yet? Yup, those are the F/stop values on your lens. Each change above represents cutting the area of the resulting circle in half, thereby cutting the amount of light allowed through the lens in half for the same shutter speed.

As you change the F/stop from a setting of 1 to 1.4 you are cutting the amount of light reaching the sensor in half. As you change the F/stop from a setting of 1.4 to 2 you cut the amount of light in half again. This means that the amount of light reaching the sensor at an F/stop setting of 1 is four times the amount of light reaching the sensor at an F/stop setting of 2.0. Remember, we cut the amount of light in half twice (1 to 1.4 and again from 1.4 to 2.0) and 2 * 2 equals 4.



The kit lens I bought with my Nikon D80 has a variable zoom range from 18mm to 135mm. This is a wonderful working range for focal lengths, covering the moderate wide angle to medium zoom range. It’s also a variable aperture lens. This means that as I change the focal length, the maximum aperture value I can use (largest opening) also changes. Let’s look at how the maximum aperture changes as I vary the focal length for this lens:


Focal Length Maximum Aperture
18mm F/3.5
19mm F/3.8
24mm F/4.0
31mm F/4.2
35mm F/4.5
44mm F/4.8
50mm F/5.0
58mm F/5.3
70 – 135mm F/5.6

Once I get past 70mm focal length, the amount of light reaching my camera’s sensor is half the amount it received when the focal length was between 24 and 30mm (F/5.6 vs F/4.0). This is an excellent “walkaround” lens. Yes, there are distortion and vignetting issues at specific settings, but once you understand how to work around these points the lens performs very well. It is very sharp throughout the F/stop range. Unfortunately, the variable F/stop range available with this lens means it cannot be used in poor light without using a flash or very slow shutter speeds.

I also have a Tamron 17-50mm constant F/2.8 and a Nikon 50mm F/1.8 lens. At 50mm, the Tamron lets in 3 1/2 times as much light as the kit lens and the 50mm Nikon lets in nearly 7 times as much light! This has several effects. First, I can shoot the same shot at much higher shutter speeds and have the same exposure. Second, I have a greater range of apertures to choose from so I can control the depth of field to a tighter range. Third, the viewfinder is much brighter, making it easier to see what you’re shooting and fourth, the camera is able to focus better in low light.

How can the camera focus better in low light with a larger F/stop? When using your camera to set up a shot, the aperture remains wide open (lowest F/stop number, largest opening). It is only when you actually take the shot that the aperture closes down to the selected position. [Note: If your camera has a “Depth of Field Preview” button, you can push this to manually close down the aperture to the selected position and see how much of your picture will be in focus.] With your camera using the largest opening possible for the given lens, the autofocus circuitry has the maximum amount of light (and thereby contrast) available to control the focus. When lens A lets in 2 or 4 or 7 times as much light as lens B, the camera can control focus MUCH easier with lens A.

Now you see why that Nikon 70-200mm, constant F/2.8 VR lens costs three times as much as my 70-300mm, F/4.5-5.6 VR lens.



Courtesy  :


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Posted by on June 9, 2014 in Technology


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Manjapai – Movie review


The movie starts in a village showing a close relationship between a grandfather and his grandchild who has lost his parents in a accident. 25 years later the boy Tamizh (Vemal) is a successful IT professional , whose only ambition is to work in the US . He manages to convince his superiors that he is worth it and gets his dream ticket. Having just three months to leave to the States, he invites his grandfather (Rajkiran) to the city to spend the rest of the days with him. The grandfather being a rustic villager, with his straight forward talking and rural practices initially turns Tamizh’s and his neighbors normal life upside down. But slowly he wins all their hearts and teaches them that people and their sentiments are of value than money itself, when tragedy strikes.
Director Raghavan has given a simple but a story with strong sentiments. Rajkiran portrays a very strong character and take charge in the film from the frame he appears. But that’s just it in the whole film in the positive side. On the negative side the film’s first half is very slow and vague. Vemal’s dosen’t match is IT professional character and his performance level is low compared to everyone in the film.Lakshmi menon who plays the love interest of Vemal has a weak role and is not given scope for acting in the film. Most of the scenes in the film are long and predictable. Lack of a clever screenplay makes the audience sleepy .With less commercial mixture and more of advice to the urban community this film might not score well in the theatres. I give it 3/10


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Posted by on June 8, 2014 in Movie Review


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