Is a teleconverter worth investing?

Two indoor, two outdoor shots using pure Canon SX50 HS at 50x zoom (center), Raynox DCR-1540Pro (left) and Vivitar 2.0X (right) teleconverters
Raynox DCR-1540PRO vs. Canon SX50 Original vs. Vivitar 2.0X

That's the question I had in the attempts to extend an already powerful 50x optical zoom on my Canon SX50 HS. The results aren't very impressive.

I bought two teleconverters for testing. The cheap one is a Vivitar Titanium 2.0X, at about US$40. The expensive one is a Raynox DCR-1540PRO with 1.54x zoom, at about $200. Unfortunately, the latter had been discontinued a long time ago (it came out at least in 2003), so I had to buy a dusty used one at half the price.

The collection of crops above really tells it all. The cheap Vivitar is trash. Completely unusable, chromatic aberrations and all. It works okay at low zoom, but that defeats the purpose.

Meanwhile, the expensive Raynox has been advertised as "for 25x or higher zoom" and "340lp/mm at center", so I was expecting better. Well, the colours are fine but it doesn't come into focus as well as I would want it to. Even at the best spot (seems to be at lower center region, not outright center for SX50 HS) it doesn't really add more detail. This might be usable for video mode, but not much value for still photos.

As for the actual multiplication, close (~5m) shots got about 1.3x for Raynox and 1.4x for Vivitar, getting roughly about half the spec. Far (~250m) shots are better, at about 1.52x for Raynox and 1.8x for Vivitar.

If anyone's searching around to see if one needs a teleconverter for a SX50 HS, I can easily tell you "don't bother".

Simpsons Tapped Out iOS 7 Login Bug Analyzed

Simpsons: Tapped Out screenshot of Wesley's Springfield
My Springfield
If you're playing Simpsons: Tapped Out game (iOS / Android) on your spare time like me, and also happened to be a developer that upgraded your phone to iOS 7 (beta 1), then you may encounter a bizarre bug where you automatically get login to a completely random, but different account.

Some leafing through the web yielded some clues on what was likely going on. It seems to be caused by the way EA implemented the device and account management.

Apparently, EA decided to keep session information of both the device and the account that it's logged in on the server. When a user exits the game and comes back, the game checks the device and automatically login to the account it was last associated with. Seems harmless, right?
Continue reading "Simpsons Tapped Out iOS 7 Login Bug Analyzed"

ํ“จ์ „FNC BT-i4M ๋ฌด์„ ํ—ค๋“œ์…‹ ๋ฆฌ๋ทฐ

Fusion FNC ๋กœ๊ณ 
ํ“จ์ „FNC ํ•˜๋ฉด ๊ฐœ์ธ์ ์œผ๋กœ ๊ณตCD, ๊ณตDVD ์ทจ๊ธ‰ ์—…์ฒด๋กœ ๊ฐ์ธ์ด ๋˜์–ด ์žˆ๋Š” ๊ณณ์ž…๋‹ˆ๋‹ค. ํ•œ์ฐฝ ์• ๋‹ˆ๋ฉ”์ด์…˜์— ์‹ฌ์ทจํ–ˆ์„ ๋•Œ ๊ณตDVD ์ฒœ์—ฌ ์žฅ์— ์ฐจ๊ณก์ฐจ๊ณก ๋ฐฑ์—…์„ ํ•ด๋‘๋˜ ๋•Œ๊ฐ€ ์ƒˆ๋ก์ƒˆ๋ก. ์ง€๊ธˆ์€ ๋‹ค์–‘ํ•œ ์ปดํ“จํ„ฐ ์•ก์„ธ์„œ๋ฆฌ๋ฅผ ์ทจ๊ธ‰ํ•˜๋Š” ์—…์ฒด๋กœ ์‚ฌ์—…์˜์—ญ์ด ํ™•๋Œ€๋˜์–ด ์žˆ๋Š”๋ฐ, ๊ทธ ์ทจ๊ธ‰ํ’ˆ๋ชฉ ์ค‘ ํ•˜๋‚˜๊ฐ€ Flaircomm์ด๋ž€ ๋ธŒ๋žœ๋“œ์˜ ๋ธ”๋ฃจํˆฌ์Šค ์žฅ๋น„์ž…๋‹ˆ๋‹ค. ์ด๋ฒˆ ๋ฆฌ๋ทฐ์—์„œ๋Š” ํ“จ์ „FNC์—์„œ ํŒ๋งคํ•˜๊ณ  ์žˆ๋Š” BT-i4M ๋ธ”๋ฃจํˆฌ์Šค ๋ชจ๋…ธ ๋ฌด์„ ํ—ค๋“œ์…‹์„ ์‚ดํŽด๋ณด๊ธฐ๋กœ ํ•˜๊ฒ ์Šต๋‹ˆ๋‹ค.

1. ์ œํ’ˆ์˜ ์ธ์ƒ

์ฒซ ์ธ์ƒ์ด ๋‚˜๋ฆ„ ์ถฉ๊ฒฉ์ ์ด์—ˆ์Šต๋‹ˆ๋‹ค. ๋””์ž์ธ ๋ชจํ‹ฐ๋ธŒ๊ฐ€ 100% ์•„์ดํฐ4์—์„œ ์–ป์—ˆ๋‹ค๋Š” ๊ฒƒ์„ ์ž๋ž‘์Šค๋Ÿฌ์šด ๋“ฏ์ด ๋ณด์—ฌ์ฃผ๊ณ  ์žˆ๊ธฐ ๋•Œ๋ฌธ์ž…๋‹ˆ๋‹ค. ํ™ˆํŽ˜์ด์ง€์˜ ์ œํ’ˆ ์†Œ๊ฐœ์—์„œ๋„ "์• ํ”Œ ์Šคํƒ€์ผ ๋””์ž์ธ"์ž„์„ ๊ฐ•์กฐํ•˜๊ณ  ์žˆ์ง€์š”. "์ง๊ด€์  ์ธํ„ฐํŽ˜์ด์Šค" ๋ถ€๋ถ„์€ ๋ชจ๋ฅด๊ฒ ์ง€๋งŒ. ๊ทธ๋Ÿฌ๊ณ  ๋ณด๋‹ˆ ์ œํ’ˆ ์ด๋ฆ„์ด i4M์ด๊ตฐ์š”. iPhone 4 Mobile?

์ž‘๋™ ์ค‘์ธ Fusion FNC Flaircomm BT-i4M ๋ณธ์ฒด

์• ํ”Œ์ด ๋ธ”๋ฃจํˆฌ์Šค ํ—ค๋“œ์…‹๋„ ๋งŒ๋“ค์—ˆ๋‹ค๋ฉด ์Šคํ‹ฐ๋ธŒ ์žก์Šค๊ฐ€ ๋‹จ๋ฒˆ์— "๋„ˆ ๊ณ ์†Œ!" ํ• ์ง€๋„ ๋ชจ๋ฅด๊ฒ ๋‹ค๋Š” ์ƒ๊ฐ์ž…๋‹ˆ๋‹ค. ์ฐธ๊ณ ๋กœ, ์ด ์ œํ’ˆ์€ ์ค‘๊ตญ Kiss Communications Technology๊ฐ€ ๋งŒ๋“  BTK-718์˜ OEM ์ œํ’ˆ์ธ ๊ฒƒ์œผ๋กœ ๋ณด์ด๋ฏ€๋กœ ๊ณ ์†Œ์žฅ์ด ๋‚˜์˜จ๋‹ค๋ฉด ์ด ํšŒ์‚ฌ๋กœ ๋จผ์ € ๊ฐ€์ง€ ์•Š์„๊นŒ ์‹ถ๊ตฐ์š”. ์–ด์จŒ๋“ , ์ง€๊ธˆ ์ œ๊ฐ€ ๊ฐ€์ง€๊ณ  ์žˆ๋Š” ์•„์ดํฐ4์™€๋Š” ์ƒ๋‹นํžˆ ์ž˜ ์–ด์šธ๋ฆฌ๋Š” ํŽธ์ด๋ผ ๋ฒ•์ ์ธ ๋ฌธ์ œ์•ผ ์–ด๋–ป๋“  ๊ฐ„์— ์ ์ˆ˜๋ฅผ ๋”ฐ๊ณ  ๋“ค์–ด ๊ฐ‘๋‹ˆ๋‹ค.
Continue reading "ํ“จ์ „FNC BT-i4M ๋ฌด์„ ํ—ค๋“œ์…‹ ๋ฆฌ๋ทฐ"

๋””์˜คํ… AllThatMobile OCR ๋ฒ ํƒ€ ๋ฆฌ๋ทฐ (2/2)

๋””์˜คํ…์ด ์ƒˆ๋กญ๊ฒŒ ์„ ๋ณด์ผ AllThatMobile OCR (์ดํ•˜ ATM)์˜ ๋ฒ ํƒ€๋ฒ„์ „ ๋ฆฌ๋ทฐ 2๋ถ€์ž…๋‹ˆ๋‹ค. ๋ชป ๋ณด์‹  ๋ถ„์€ ๋ฆฌ๋ทฐ 1๋ถ€๋ฅผ ๋จผ์ € ๋ณด์‹œ๊ณ  ์˜ค์„ธ์š”. ์—ฌ๊ธฐ์„œ ๊ธฐ๋‹ค๋ฆฌ๊ณ  ์žˆ๊ฒ ์Šต๋‹ˆ๋‹ค. ์ค€๋น„๊ฐ€ ๋˜์‹  ๋ถ„์€ ๊ณ„์† ์ฝ์–ด์ฃผ์„ธ์š”.

3. ๋ฌธ์„œ ์ธ์‹๊ธฐ๋Šฅ

ATM์œผ๋กœ ๋ฌธ์„œ ์ธ์‹ํ•˜๋Š” ๋ชจ์Šต

์ธ์‹์˜์—ญ ์„ค์ •
๋ฉ”์ธ ํ™”๋ฉด์—์„œ "๋ฌธ์„œ ์ธ์‹" ์•„์ด์ฝ˜์„ ๋ˆ„๋ฅด๊ณ  ์•„๋ž˜์ฒ˜๋Ÿผ ์ธ์‹ํ•  ๋ฌธ์„œ๋ฅผ ์นด๋ฉ”๋ผ๋กœ ์ดฌ์˜ํ•˜๊ฑฐ๋‚˜ ์ด๋ฏธ ์ค€๋น„๋œ ์ด๋ฏธ์ง€๋ฅผ ๋ถˆ๋Ÿฌ๋“ค์ด๋ฉด ๋ฉ๋‹ˆ๋‹ค. ๋ฐฉ๋ฒ•์€ ๋ช…ํ•จ ์ธ์‹ ๋•Œ์™€ ๋™์ผํ•ฉ๋‹ˆ๋‹ค.

์ด๋ฏธ์ง€๊ฐ€ ์ค€๋น„๋˜๋ฉด, ์˜ค๋ฅธ์ชฝ์—์„œ ๋ณผ ์ˆ˜ ์žˆ๋“ฏ์ด ํ‹€์„ ์›€์ง์—ฌ ์ธ์‹ ์˜์—ญ์„ ์ง€์ •ํ•ฉ๋‹ˆ๋‹ค. ๋ฐฉ๋ฒ•๊ณผ ํ•œ๊ณ„๋Š” ๋ฆฌ๋ทฐ 1๋ถ€์—์„œ ๋ณธ ๋ช…ํ•จ ์ธ์‹ ๋•Œ์™€ ๊ฑฐ์˜ ๋™์ผํ•ฉ๋‹ˆ๋‹ค. ๋ช…ํ•จ ์ธ์‹๊ณผ ์ฐจ์ด๊ฐ€ ์žˆ๋‹ค๋ฉด, ์ธ์‹ ์˜์—ญ์„ ์ง€์ •ํ•œ ๋’ค ๋ฐ”๋กœ ์„œ๋ฒ„์— ์ „์†กํ•˜๋Š” ๊ฒƒ์ด ์•„๋‹ˆ๊ณ  ๋ฌธ์„œ๋ฅผ ๋ฐ›๋Š” ์‚ฌ๋žŒ, ์ œ๋ชฉ, ํŒŒ์ผ์ด๋ฆ„, ํŒŒ์ผ ํ˜•์‹, ์ธ์‹ ์–ธ์–ด๋ฅผ ๋จผ์ € ์„ค์ •ํ•œ๋‹ค๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค.
Continue reading "๋””์˜คํ… AllThatMobile OCR ๋ฒ ํƒ€ ๋ฆฌ๋ทฐ (2/2)"

๋””์˜คํ… AllThatMobile OCR ๋ฒ ํƒ€ ๋ฆฌ๋ทฐ (1/2)

AllThatMobile ๋กœ๊ณ 
๋””์˜คํ…์€ ์ง€๋‚œ ๋ฒˆ ๋””์˜ค๋”• ๋ฆฌ๋ทฐ์—์„œ ๋ณด์•˜๋“ฏ์ด ๋ชจ๋ฐ”์ผ ๊ธฐ๊ธฐ์˜ ํ•„๊ธฐ ๋ฐ ๋ฌธ์ž์ธ์‹ ๋ถ„์•ผ์—์„œ ์ผ๊ฐ€๊ฒฌ์ด ์žˆ๋Š” ํšŒ์‚ฌ์ž…๋‹ˆ๋‹ค. ์ตœ๊ทผ์—๋Š” ๋ฌธ์ž์ธ์‹ ์˜์—ญ์œผ๋กœ ํ™•๋Œ€๋ฅผ ํ•ด๊ฐ€๋Š” ๊ฒฝํ–ฅ์ด ์žˆ๋Š”๋ฐ, ํ˜„์žฌ ์•ฑ์Šคํ† ์–ด ๋“ฑ์—์„œ ํŒ๋งค๊ฐ€ ๋˜๊ณ  ์žˆ๋Š” ๋ช…ํ•จ์ธ์‹ ์•ฑ์ธ ๋ชจ๋น„๋ฆฌ๋”(MobiReader)๋ฅผ ๋ณด๋”๋ผ๋„ ์•Œ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค. ์ด๋ฒˆ์—๋Š” ๋ช…ํ•จ์ธ์‹ ๋ฟ๋งŒ ์•„๋‹ˆ๋ผ ๋ฌธ์„œ์ธ์‹๊ณผ ํŒฉ์Šค์ „์†ก๊นŒ์ง€ ๊ฒธํ•˜๋Š” ์ข…ํ•ฉ OCR(๊ด‘ํ•™๋ฌธ์ž์ธ์‹) ์•ฑ์ธ AllThatMobile OCR์„ ์„ ๋ณด์ด๋ ค๊ณ  ํ•˜๊ณ  ์žˆ์–ด์„œ ๋ฒ ํƒ€ํ…Œ์ŠคํŠธ๋ฅผ ํ•ด๋ดค์Šต๋‹ˆ๋‹ค.

1. ๊ธฐ๋ณธ ์‹คํ–‰ํ™˜๊ฒฝ

์‹œ์ž‘๋ถ€ํ„ฐ ์‚๊ฑฑ?
์‚ฌ์šฉํ•˜๊ฒŒ ๋œ AllThatMobile OCR (์ดํ•˜ ATM) ๋ฒ ํƒ€๋Š” 0.9.23 ๋ฒ„์ „์ด๋ฉฐ, ์•ˆ๋“œ๋กœ์ด๋“œ ๋ฒ„์ „๋งŒ ๊ฐœ๋ฐœ๋˜์–ด ์žˆ๋Š” ๊ด€๊ณ„๋กœ ์ˆœ์ • ํ”„๋กœ์š”(์•ˆ๋“œ๋กœ์ด๋“œ 2.2)๊ฐ€ ์„ค์น˜๋œ ๊ณต์žฅ์ดˆ๊ธฐํ™” ์ƒํƒœ์˜ ๋ชจํ† ๋กœ๋ผ ๋ชจํ† ๋กœ์ด(Motoroi)์— ์„ค์น˜ํ•˜์—ฌ ์‚ฌ์šฉํ–ˆ์Šต๋‹ˆ๋‹ค. ์•ฑ์„ ์ฒ˜์Œ ์‹คํ–‰์‹œํ‚ค๋ฉด ๊ณ„์ • ๋กœ๊ทธ์ธ ํŽ˜์ด์ง€๊ฐ€ ๋œจ๋Š”๋ฐ (์‚ฌ์‹ค ๋งจ ์ฒ˜์Œ ๋ณธ ๊ฒƒ์€ ์˜ค๋ฅธ์ชฝ๊ณผ ๊ฐ™์€ ์•ฑ์ด ๋‹ค์šด๋˜๋Š” ํ™”๋ฉด์ด๋ผ ๋‹นํ™ฉ์Šค๋Ÿฌ์› ์Œ - ์žฌ์‹œ์ž‘ํ•˜๋‹ˆ ์ฒซ ํ™”๋ฉด์„ ๋ณผ ์ˆ˜ ์žˆ์—ˆ๋Š”๋ฐ ์•„๋ฌด๋ž˜๋„ ๋ฒ ํƒ€์˜ ๋ฒ„๊ทธ์ธ ๋“ฏ), ์ด๊ฒƒ์€ ATM์ด ์ผ์ข…์˜ ์˜จ๋ผ์ธ ์„œ๋น„์Šค๋ผ๋Š” ๊ฒƒ์„ ์•”์‹œํ•˜๋Š” ๊ฒƒ์ด์—ˆ์Šต๋‹ˆ๋‹ค. ์•ฑ ๋‚ด์—์„œ "๊ณ„์ • ์ƒ์„ฑ" ๋ฒ„ํŠผ์„ ๋ˆ„๋ฅด๋ฉด ๊ฐ„๋‹จํ•˜๊ฒŒ ๊ณ„์ •์„ ๋งŒ๋“ค ์ˆ˜ ์žˆ์—ˆ์œผ๋ฉฐ, "์ž๋™ ๋กœ๊ทธ์ธ"์— ์ฒดํฌ๋ฅผ ํ•ด๋‘๋ฉด ๋‹ค์‹œ๋Š” ๋กœ๊ทธ์ธ ํ™”๋ฉด์„ ๋ณผ ํ•„์š”๊ฐ€ ์—†๊ฒŒ ๋ฉ๋‹ˆ๋‹ค.

๋กœ๊ทธ์ธ์ด ๋œ ์ƒํƒœ๋ผ๋ฉด, ATM์ด ์ œ๊ณตํ•˜๋Š” "๋ฌธ์„œ ์ธ์‹", "๋ช…ํ•จ ์ธ์‹", "ํŒฉ์Šค" ๊ธฐ๋Šฅ๊ณผ, ๊ทธ๋™์•ˆ ์ž‘์—…ํ–ˆ๋˜ ๋ฌธ์„œ๊ฐ€ ๋ณด๊ด€๋œ "๋ฌธ์„œํ•จ"์˜ ์•„์ด์ฝ˜์ด ๋‚˜์˜ค๋ฉฐ, ๊ธฐ๊ธฐ์˜ ๋ฉ”๋‰ด ํ‚ค๋ฅผ ๋ˆ„๋ฅด๋ฉด "์•Œ๋ฆผ"๊ณผ "์„ค์ •" ๋ฉ”๋‰ด๊ฐ€ ๋‚˜์˜ต๋‹ˆ๋‹ค. ํ™”๋ฉด ๊ตฌ์„ฑ์€ ๋„ˆ๋ฌด ๊น”๋”ํ•œ ๋‚˜๋จธ์ง€ ๋ญ”๊ฐ€ ๋ถ€์กฑํ•œ ๋“ฏํ•œ ๋А๋‚Œ์ด ๋“ค ์ •๋„์ž…๋‹ˆ๋‹ค. ํŠนํžˆ, ๋ชจํ† ๋กœ์ด๊ฐ€ ๋‹ค๋ฅธ ์•ˆ๋“œ๋กœ์ด๋“œ ํฐ๋ณด๋‹ค ํ™”๋ฉด์ด ์•„๋ž˜๋กœ ์•ฝ๊ฐ„ ๋” ๊ธธ์–ด์„œ (800์ด ์•„๋‹Œ 854 ํ”ฝ์…€) ๊ทธ๋Ÿฐ์ง€ ์•„๋ž˜์˜ ์—ฌ๋ฐฑ์ด ๋” ํฌ๊ฒŒ ์™€๋‹ฟ์•˜์Šต๋‹ˆ๋‹ค. ์•„์ด์ฝ˜ ํฌ๊ธฐ๋ฅผ ์ข€ ๋” ํ‚ค์›Œ๋„ ๋˜์—ˆ์„ ๊ฒƒ ๊ฐ™์•˜์Šต๋‹ˆ๋‹ค.

 
ATM ์ฒซ ์‹คํ–‰ํ™”๋ฉด (๋กœ๊ทธ์ธ ์ „๊ณผ ํ›„)

Continue reading "๋””์˜คํ… AllThatMobile OCR ๋ฒ ํƒ€ ๋ฆฌ๋ทฐ (1/2)"

Copyright (C) 1996-2026 Woo-Duk Chung (Wesley Woo-Duk Hwang-Chung). All rights reserved.