Testing the sharpness on lens

Schizophonic · 12 Dec 2007 at 21:19

From a monthly camera magazine, they gave out small A5 Cardboard sheet with various shapes and symbols.

I just tested my 3 lens,

50mm F2.8 @ F5.6
18-55mm (350D Stock lens) @ F5.6
35-70mm F3.5-4.5mm @ F5.6

Lens1

Lens2

Lens3

Can you guess which one is which...?

As you can see, the difference is quite suitle. Though i'm not even sure i've done this test correctly.

EDIT: Can anyone see the images yet? :S
EDIT1: Links up now!

Johnny|lucidcomposure · 12 Dec 2007 at 21:22

Unlucky for you the test was printed on a board the same color as the forums......

ScarySquirrel · 12 Dec 2007 at 21:23

I just see 3 red X's!

Mint_Sauce · 12 Dec 2007 at 21:32

How did you set it up? Tripod and mirror lock up? Also, use ISO 100 just so the images don't have too much noise.

EDIT: I get a red X on no:3.

Schizophonic · 12 Dec 2007 at 21:34

Yeah, set up on a tripod and rest the board on my keyboard. Whats the mirrow lock up?

Mint_Sauce · 12 Dec 2007 at 21:39

Schizophonic said:
Yeah, set up on a tripod and rest the board on my keyboard. Whats the mirrow lock up?

It should be in the custom functions menu, it means when you press the shutter button the mirror locks up first and then when you press the shutter button again it starts the exposure. This stops the camera shaking slightly when the mirror flicks up giving you a cleaner image.

Also, use the timer function so when you're pressing the shutter button you don't move the camera.

Using mirror lock up and the timer function on a tripod will give you the sharpest image possible.

Johnny|lucidcomposure · 12 Dec 2007 at 22:02

Prime was always going to be the sharpest followed by the mid range zoom.

at 1/50th and 1/30th I would have hoped that mirror lock up and remote timing was on.

ScarySquirrel · 12 Dec 2007 at 22:02

1st one must be the stock lens.

GTRacer · 12 Dec 2007 at 22:04

I just shoot lens caps.

wez130 · 12 Dec 2007 at 22:10

Are these crops from the centre of the image or the edge?

It's easy to see which is which as it says in the exif which you've provided.

aztechnology · 12 Dec 2007 at 22:10

I hope you are not expecting us to guess which is which, as I'll cheat and read the EXIF data you have included.

doh! beaten by upto 59 seconds...

What mag was this in, as I fancy a go at this myself....

Johnny|lucidcomposure · 12 Dec 2007 at 22:34

Practical or Monthly at a guess?

wez130 · 13 Dec 2007 at 14:46

aztechnology said:
What mag was this in, as I fancy a go at this myself....

It was in Decembers Digital Camera magazine - if you're quick you may just get a copy before Jans comes out.

Schizophonic · 13 Dec 2007 at 20:55

Mint_Sauce said:
It should be in the custom functions menu, it means when you press the shutter button the mirror locks up first and then when you press the shutter button again it starts the exposure. This stops the camera shaking slightly when the mirror flicks up giving you a cleaner image.

Also, use the timer function so when you're pressing the shutter button you don't move the camera.

Using mirror lock up and the timer function on a tripod will give you the sharpest image possible.

Since i have a Canon, how do i do this mirror lock? Do i put it in manuel mode and move the f-stops to "Bulb" setting and then choose any shutter speed?

wez130 · 13 Dec 2007 at 22:21

Schizophonic said:
Since i have a Canon, how do i do this mirror lock? Do i put it in manuel mode and move the f-stops to "Bulb" setting and then choose any shutter speed?

mirror lock up is in custom functions in your menu, you need to set it to '1'.