Focus Test Chart on Ebay

[Sphinx]

Hi,

My friend says he is having some issues with his kit, so I suggested doing the AA battery line up test in a 45 degrees angle to see if there is a front/back focus problem.

He emailed me this today :

Saw this on ebay :

http://www.ebay.co.uk/itm/121293730...49&ssPageName=STRK:MEBIDX:IT&autorefresh=true

What are you thoughts on this?

Worth getting?

 

[boyfalldown]

I think its a good way of wasting a few quid.

 

[HoppyUK]

Yes, that would work well. An important point is not to shoot at unrealistically close distance, not less than say 1.5-2m for any lens, and more than that for longer focal lengths. All AF micro-adjustment is a compromise and if you're too close it's possible to introduce an error at normal shooting distances rather than correcting it. The line of batteries is not a good set up. Alternatively, this is exactly the same idea:

 

[higgeh]

Id say its worth it for £3.60

 

[4wd]

It's only a ruler set at 45 degrees.

 

[droj]

It's only a ruler set at 45 degrees.

It's slightly more than that - it incorporates a target.

 

[Bythesea]

There is a free download of one you can print out and stick to card, find it at squit.co.uk/photo/downloads.html. Worked for me.

 

[HoppyUK]

Small point, with some cameras it's possible (if unlikely) that the AF could be confused by straight vertical and horizontal lines. The ideal is a high contrast random-shaped target, such as the lettering on a cereal box. If in doubt, just draw a few squiggles on the target zone with a black felt-tip.