Blocked telephone numbers, and the not answering of them

PhoneInAdelaide.jpg

There seems to be quite a strong mentality these days that one shouldn't answer phone calls that come from blocked numbers -- that is, phone numbers with their caller ID suppressed. I find this interesting. I did a bit of Googling, and I've discovered heaps upon heaps of people who refuse to answer them, often on entirely vague or misguided grounds. I have a number of plausible theories for why people do this, some of which can be combined together: 1. They're expecting bad news. Or they owe money. While it's probably better to answer a telephone call from a debt collector than have them come knocking on your front door, I can at least understand the logic behind avoiding the call.

2. In the '90s, prior to the ACMA Do Not Call Register being introduced to Australia, there was a strong predilection for telemarketers to use blocked numbers when calling. A lot of these companies would also employ computer systems that would automatically dial from lists of numbers, confirming a number's validity when someone answered. These culled lists of numbers-that-get-answered would then be sold on to other telemarketing companies for a sizeable profit. Since the introduction of the DNC Register, it's illegal for telemarketers to call, period, let alone use blocked numbers. That's not to say that a scad few don't choose to break the law and call anyway, but the odds have reduced significantly. Charities and other organisations that are immune to the DNC Register are required to have their numbers visible to the receiver, so that removes them from the equation.

3. Psycho exes, drunk friends, whatnot. You can opt for your own telephone number to be made silent/blocked/private. Some handsets differentiate between blocked numbers and private numbers. Dialing 1-8-3-1 before the recipient's number will temporarily make your Australian phone number into a blocked number, so it's entirely possible to prank call people in this fashion without having a prior arrangement with your telco. In the scenario of these types of calls, I can once again understand the decision to not answer.

There are another couple of things I'd like to add to this inconclusive report:

• Many businesses, particularly doctors and large agencies (to give only two examples) use blocked numbers for a perfectly practical reason. Doctors want to be able to contact their patients to deliver news or test results, but they don't need the patient to be able to call them back on their own personal desk phone with every little itch and malady. That's why there's a receptionist and a system to make appointments. Agencies with call centres use blocked numbers because their staff are often trained in specific tasks (such as performing a data fix on client accounts, for example) and only need to contact the public for specific information. There is no reason that the recipient of the call should ever need to contact the staff member again, because the staff member is not trained to help with general enquiries. It would be a waste of the company's resources to make public the staff's individual extension numbers, because the phones would then be ringing with calls that could not be acted upon by those answering them.

• "If you need to contact me, I have the right to know who you are". Fair enough, but why don't you ask them when you answer the phone? If I was calling from a number that you wouldn't recognise, what would make you answer that number in contrast to no information at all? You can always hang up.

My work calls me from blocked numbers. That's a pretty good reason to answer them. But maybe that makes me unique.

Ring ring.

Follow-up, August 2013: Answers to common search queries relating to this article:

Question: why shouldn't i answer calls from blocked number Answer: There is absolutely no reason why you should avoid answering calls from a blocked number. (Provided you're not avoiding a stalker or dangerous ex or calls from a utility company that wants your money in exchange for a service they've already provided you. In the latter case, perhaps you should just pay your bill. Or arrange a payment plan. Something like that.)

Meanwhile, on Planet Plastic

There are so many things in the world that are inevitable. Like the Mayan apocalypse. And talent shows. Wow, do I hate talent shows. Also, action figures. Heroes of Science Vols. I & II went nuts, so it's to be expected that I'd make more. I figured it'd be only right to make one of myself. So here it is.

Collect all one of them!

The purpose of the thing is to act as a "deviant id" on DeviantART, identifying me to other DA users in a trendy and interesting way. I used to have a fake railway ticket serving the same purpose.

Enjoy.

50mm lens experiments and shenanigans.

Decided to do some hands-on tests so I could see for myself the difference in crop factors and lens quality between the Olympus OM 50mm f1.8 and the Canon EF 50mm f1.8 II lenses. This post contains a lot of images and may be boring if you're not into camera lenses and pixel scrutinising -- hit the jump if you're interested in the results.

These shots demonstrate the difference in crop factor (focal length multiplier) between the Canon APS-C and Olympus Four Thirds sensor sizes. I've scaled the bottom image down to the same "size" as the top one, clearly demonstrating the difference between the Canon (1.6x) and Olympus (1.84x) crops.

Never realised how much was actually lost using a Four Thirds sensor.

Two shots from the Olympus E-510, comparing a 50mm zoom on my telephoto lens (the only other lens I have capable of a 50mm focal length) and "50mm" on the old OM legacy lens.

When I first bought the old OM lens and adaptor, one of the things I had read about was a considerably different focal length resulting on the 4/3 cameras, but this demonstrates that the difference is actually quite minor.

Yes, I realise the top photo is overexposed.

Olympus vs. Canon 50mm f1.8 lenses.

There's a lot of criticism of the Canon lens for having pretty nasty bokeh (out of focus areas) because of its five-bladed aperture, but all in all, it's not too bad, in my opinion. The OM lens loses some sharpness, which is to be expected, but I think I still prefer its result. I find that the Canon 50mm tends to get less pronounced glowing edges on the highlight hotspots.

Same test, same lens, different aperture. Reduced to f4.0, the Canon EF 50mm's bokeh looks significantly nastier than the Olympus OM 50mm's, at least in my opinion. There seems to be a tiny bit of light leaking around the aperture blades on the Canon, making the corners of the highlight hotspots quite harsh, really accentuating the five aperture blades. At the same camera settings, the Canon's image at f4.0 is undoubtedly sharper, though.

Direct comparison between the Olympus and Canon 50mm lenses. All in all, the difference for this kind of image is pretty insignificant. Auto white balance seems to have thrown a yellow cast to the Canon photo.

OM, pros: - $50 from Ebay + $5-$35 for adaptor - More pleasing bokeh. - Quality construction, from the days where stuff was made properly, ergo: sturdier lens. (Lens mount/adaptor, not so much, though) - Very trendy

OM, cons: - Adaptor is atrocious, but for this I can blame someone on Ebay from Hong Kong - Image slightly less sharp than Canon - No auto focus function

Canon, pros: - $90 - Auto focus - Sharper image - Ludicrously lightweight - Adaptor not required, obviously

Canon, cons: - While autofocus exists, it sounds like it's grinding up Legos inside there - Very cheap construction; very cheap lens

Overall, I think I still prefer the Olympus OM 50mm lens. The Canon one just seems utterly disposable in comparison.