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Recently, my most expensive lens in my setup was giving me some problems. Something seems loose and it affects the focusing. These are the symptoms for the lens.

  1. Lens mount and tripod collar area seem loose from the rest of the lens body. You could literally shake and see that these were 2 different parts of the lens
  2. The lens refuses to focus to infinity at 70mm, it shows no such problem at 210mm.
  3. Occasionally, the lens refuses to focus and you could hear the 'gears' rubbing against each other.
  4. The lens seem fragile and seem like it would fall apart any time.
The root of the problem was clear, something is loose inside the lens affecting the autofocus. Since I got this out of production lens cheap, there wasn't any warranty in it even though it is less than 1 year old for me (but the lens could be more than a decade old). Anyway, I had some free time after my examinations to do some exploration and managed to fix it. Here's how I did it.

Equipment
  1. Phillips head screwdriver
  2. Hex (Allen) key (optional)
  3. Blower
  4. Lens Cloth
  5. Tissue

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Unscrew the lens mount (held with 4 screws) but be careful as the screws are 'glued' so if you are not careful you might ruin the thread and lose a screw when you have to use emergency measures to remove them (like me). Unscrew the lens mount contact (2 screws) too and get prepared to remove the metal lens mount.

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After removing the metal lens mount, you will find many more screws here. unscrew those 6 screws held 60 degrees apart. You can see that I removed 5 out of 6 of them here. Now when you are done, remove this part of the lens mount too but be careful as the screw drive focus mechanism is housed here and if you lose that screw, you lose autofocus.

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A closer look at the screw that drives the auto focus for Minolta lens. At this stage, the spring that controls your aperture is exposed too. If you have problems with the aperture, I guess you could start to work on it here. Mess up your aperture spring and you will get a true 'constant' aperture lens.

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Now once you removed that part, you will find 4 screws, of which the 2 visible are circled here. Now these screws are hex (allen) style instead of the phillips head type. You could look for a hex key to tighten it or you could just use your screwdriver like I did.

After tightening, put back all the parts and screw tight. You may want to use your blower to blow away any dust in the process and use tissue to clean the lens mount area. Finally lens cloth for the finishing touch and your lens is ready.

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Unless you are like me. Carelessly left some parts outside the lens so I have to take it open again just to stuff it back in.

Now my chair is a bit wobbly recently. Maybe I should get a spanner next.

This time tomorrow

Marks the end of my 1st semester doing Masters... phew.... another 4 more semesters of hectic life like this I guess... almost 20% gone.. what keeps me going? Well... funny stuff like this (in chinese though). Sucre and I laughed our guts out over this... lol.. I stopped studying but she's still mugging.

"If you learn nothing new at 10 pm, you will not learn anything new at 12 midnight"
Time for me to rest.

There are mainly 2 types of people in the exhibition, some went there for the cars, other went for the babes (and taking photographs of them). I'm neither of them. Here's some photos of sexy pretty race queens in latex/PVC/tights looking charmingly beautiful all day. Enjoy.

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Looking this way

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Balancing act

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I like orange, it's the colour of Alpha (actually more like cinnebar)

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Urm... you sure the bonnet can take the weight of 3 ladies?

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FHM thought it's a good idea to sell some mags there.

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It's actually cold in there and I pity the ladies

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Nice boots, with that furry white ball there

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Black fingernail polish... yeew...

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Sucre's favourite model, she thinks that she's very pretty. So must have more photos

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She's so hot she's flaring my camera... look at that hot spot on her left arm!

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Accidental glow from someone else's flash

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The final 3

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Cute

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Cuter

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Cutest - (Ugly but adorable) With her slightly crooked smile and not so uniform teeth

Some of those babes look familiar... see if you can spot any of them from my March Sony babe shootout.

Now enough of eye candies... 2 more days to go... 1 more page of cheat help sheet to prepare..

SIN does not represent Singapore, nor is it a 'sin'. It stands for Super Import Nights. Something that happened quite some time ago which I was there by chance and paid 20 bucks to go in and grab a few shots. Darn, wasn't prepared for a day's worth of shooting so I'm without additional lens or an extra memory card. That shall not happen again. Will always have 4gb spare with me wherever I go.

I'm not a car person so please bear with my (lack of) intelligent captions

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Lotus cars (obviously) in yellow and black (duh...)

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'mata chiah'

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Mitsubishi

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Is this imported from Japan with it's Japanese license plate?

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Some people treat their personal transport like their wife, literally


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Batman's other car

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For the girls who love cars

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4D anyone?

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Something orange

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Lamborghini in 'save the earth' green paint but 'waste the earth' engine inside

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Best car for costume party

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Anime theme

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That's 70s!

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Grumpy piggy

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Exhibitionist

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Choice car for Singaporeans nowadays, BMW

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Black and Orange, like Sony's Alphas

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And who could forget, Ferrari

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Overview...

Babes to come another day. 6 days to salvation...
All images taken handheld using the Sony Alpha A100.

Ok, 1 paper down, another one to go... but before that, we are still waiting for the 2nd appointment and while waiting for the paper to start at 7pm I did some calculations for the HDB loan again to check my 'working' previously. Well.. gotta distract my mind and keep it sharp after preparing for exams eh... (my study pattern is weird to Sucre but as long as it works, I'm fine with it)

Anyway, I found out that previously I missed out some important points when I did the comparison using the calculator function from CPF. The actual fact is not as simple.

The concessionary HDB housing loan has an interest of 2.6% currently, the CPF interest rate in our ordinary account is 2.5%. Now the calculations were correct if we borrow $X from HDB to pay for our house and indeed we will be paying $Y extra if we take up a 30 year loan versus, say a 15 year loan. BUT....

1.) If we use CPF money to service the HDB loan, that is like borrowing money from CPF to pay off another loan. Yes, CPF interest rate is lower at 2.5% but the difference of 0.1% is negligible compared to say, the >4% inflation we experienced lately. (In fact, if we consider inflation in a very rough way, the total salary we are drawing in civil service could be less than last year assuming our pay is stagnant! 15 months / 1.04 = 14.4 months or equivalent of 2.4 months bonus) Anyway, if we service the loan using 100% CPF money (which most couples would do), then it doesn't really matter much if you take a 30 year loan or a 30 day loan since we will still 'owe' the government money (the only difference is in interest)

2.) If we take up a 30 year loan and use less of our CPF money to service the HDB loan per month, we would have more money to 'save' in our CPF and earn 2.5% interest instead. That is without investing the money, something that Barney pointed out in my first post! Comparing a saving of 0.1% interest in loan versus a 2.5% interest gain, which is better? Of course, the actual computation is much more complicated than that, it depends on the fraction of your CPF used to service the loan monthly etc. I spend quite some time working on 3 excel sheets to do computations and arrive with the estimated difference.

The estimated difference for a $220K loan taken over 15 years compared to 30 years after considering 1.) interest payable for HDB loan, 2.) interest payable for CPF 'loan' (or accrued interest as they coin it), 3.) interest that would be gain/lost if we put the CPF money to earn only 2.5% interest is more than $23000 after 15 years!

Of course it makes things even more complicated that when you sell off your flat after 15 years and the money earn from the sales is insufficient to cover for the money you still owe HDB + CPF principal amount + accrued interest, your 15 year loan may still end up to be a better deal since CPF will write off the amount you owe them if the sales of the house could not cover for the total amount but I doubt HDB will 'write off' amount that you owe them. But I have to add, this scenario will only happen if the (touchwood) property market crashes and 5 room flats go for less than $100K etc

(Note! All computations based on a principal amount of $220,000)

The Big Question is
If getting the HDB concessionary loan is such a good deal then why are we given the option to 'shorten' our loans?

Well, not everyone could get HDB concessionary loan at a low 2.6% interest. Bank loans like the POSB Home Ideal charges a rate much higher than HDB, more than 4% to be exact and with terms and conditions applied (loan amount<>

I did another lengthy calculation to compare the 15 year loan and 30 year loan with a home loan interest rate of 4.5% instead of 2.6%, and keeping other conditions the same, the 15 year loan becomes a better deal by a sum of about $4000. I didn't bother to spend more time to look at where is the 'balance' point whereby both 15 year and 30 year loan would be 'equal', but I guess it is near the 4% rate that banks are charging so they can 'maximise' their earnings from interest collected from your loan and yet you would get a 30 year loan.

If the bank interest is much less, they earn much less income from interest with your 30 year loan, if the interest is much more, you would want to take a shorter loan to save money and a shorter loan translate to lesser income. (I seem to be forgetting inflation but hey, I don't work in the finance sector your know) Darn those banks, they get everything calculated nicely. And if you would like to complicate matters even further, add cpf investment, variable bank rates and partial payment in cash into the calculation too.

Bank loans are for my next housing property when I'm no longer eligible for HDB loans. For now, I know I will get a 30 year HDB concessionary loan for my new house instead.

I stand corrected

For a week, little princess suffered from diarrhea and fever. Hospitalize since last weekend, her condition took a turn for the worse and is now on intravenous antibiotics. The image of a rubber pipe sticking out of a child is too much for me to imagine. After blood tests, feces tests, urine tests and what else can you test, doctors still can't pin point the cause for her sickness. Let's hope she recovers soon and get back to be her usual bubbly self like here.

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Going to visit the playground

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The 'harmonic oscillator' toy?

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Converting gravitational potential energy to kinetic energy

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The 'awwww.....' kind of face she does in front of the camera

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Another similar pose

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Must take a break sometimes

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One small step for an adult, a giant leap for her

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Rotational motion involved too

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Challenging the slide alone

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Waiting for her to go home

I really should do some post processing for these photos.