July 19, 2009

Wassup wit Binoculars?


For a long time now I have wanted a pair of Binoculars. Being the shrewd businessman I am, I scoured Garage sale after Garage sale until the years of searching finally paid off. There they were. A battered pair of beautiful optical technology.

$20.00 was the price tag...yeah right. Here's the conversation as it happened...

Me: (Cheekily) Would you take $5.00 ?
Old man: (waves hand) Haha, a bit more than that.
Me: (casually looks away) Hmmm...
Old mans assistant: I'll give you $10.00 !
Me: Ok, you can have them for $10.00
Old mans assistant: (silence...long pause)
Me: Are you sure you won't take $5.00 ?
Old man: (defeated) $7.00 ?
Me: (smiling widely) Ok $7.00 it is!

Yes! Finally! Woohoo! Come on kids (no you can't have the Koala) let's go!

So why did I want a pair of Binoculars?

Binoculars are almost a necessity for the astronomer, hunter, saltwater fisherman, boater, sports fan, and experienced traveler and bird watcher (the ornithologist not the other kind...dodgy)

I got home and gave them a clean up and spray with Silicone Spray (seized by years of salt air on the old man's boat). So now at least they don't have spider webs and they move freely. Basically they work good as gold.

Here's the specs:
Carton Optics Tokyo (7 x 50) Field 7.1 No: 351438 - Sweetness!
A 'good' pair of Binoculars depends on:
  1. The type of glass selected for binocular lenses and prisms.
  2. The design of the eyepieces.
  3. The size and type of prisms.
  4. The care in grinding and polishing the glass elements
  5. The type and coverage of anti-reflection coatings etc etc (yawn)

Let's talk POWER.
Binoculars are commonly described by using a pair of numbers, as in "7x50" or "8x25."
The first of these numbers refers to the magnification offered by the binocular. In the examples above, "7x" means the binocular makes whatever you look at appear seven times closer than it does to the unaided human eye.

Common binocular magnifications are 6x, 7x, 8x, 9x, and 10x.
Remember that everything (including movement) is magnified when you look through a pair of binoculars, especially your own shakes and tremors. So the higher the power, the harder it seems to hold the binoculars steady. 6, 7, or 8 power binoculars are easier for most people, even those with very steady hands, to hold reasonably still. The higher powers sound like a good deal, but often result in jiggly, blurred views. This is why 7x binoculars are chosen by so many experts, including the military.

So my 7x50's are sounding sweet!
The second number most commonly associated with binoculars refers to the diameter of the objective lens in millimeters. Thus in "7x50," the "50" means that the front lenses of the binoculars are 50mm in diameter, which is large for hand held binoculars.

The larger the diameter of the front objectives, the more light can enter the binoculars and be focused to your eyes. Therefore you can see better in dim light with binoculars that have large front lenses. For example, 7x50 binoculars are often called "night glasses" because they seem so bright in dim light.

Yes! 7x50's Rock!












Wassup wit the Abacus?


Did you have one of these when you went to school? If you did you are probably showing your age. Mind you who knows what they are teaching kids these days? It is of course the humble Abacus.

According to Wikipedia...An abacus, also called a counting frame, is a calculating tool used primarily in parts of Asia for performing mathematical processes. Today, abacuses are often constructed as a bamboo frame with beads sliding on wires, but originally they were beans or stones moved in grooves in sand or on tablets of wood, stone, or metal. The abacus was in use centuries before the adoption of the written modern numeral system and is still widely used by merchants, traders and clerks in Asia, Africa, and elsewhere.

I was wondering how I could help my five year old daughter with her maths and suddenly a revelatory image of an abacus flew into my mind...EUREKA!

So I was talking to my dad who quickly and unbeknownst to me, whipped up an awesome abacus. Thanks Dad! You are the man!

Now, our Abacus is modelled on one used in a Danish Elementary School (which is based on the Russian Abacus) - why choose that one? Good question. In its basic form it can be used to count numbers from 1 - 100 and perform basic addition and subtraction - good for the kids.

The most popular seems to be the Japanese Soroban. But somehow this seemed a little complicated for my kids.

Japanese Soroban
The user of an abacus who slides the beads of the abacus by hand is called an abacist.

I am the ABACIST! I have been challenging myself to complex addition and Subtraction equations and the Abacus is not only accurate but it is surprisingly fast. Giving the rows values from bottom to top:
  1. Ones

  2. Tens

  3. Hundreds

  4. Thousands etc

You get the picture. Massive numbers can be calculated!

My wife is not at all enthused by my obvious skills but i'm not daunted. I am trying to figure out if Multiplication and Division can be done on a 'Russian' type Abacus. It can be done on a Soroban but hey...it's for the kids right?


Anyone keen for an Abacus Challenge? I know - I'm a big child-like Geek!

Check this out...funny in a scary way.