Aberations at G3 or what???

[DJSP]

I capture the image but i view on the side of the picture and on LCD display curve on the picture did is normal or aberations or what problem or not how i test optics test?need help?
thx a lot!

[hypokondriak]

can you try rephrasing that? i'm completely lost.. is something showing up in the picture that isn't in the lcd display?

[PFlor]

I think he means... when reviewing a picture with the histogram displayed the 'curve' (histogram) appears normal. So how would you test a picture with chromatic abberations.

My answer: you really won't be able to tell just by looking at the histogram. The only way is download the image to your computer and carefully examine.

[DJSP]

In the display is litle curved on side of the picture and on a shot is same.My problem is when i capture with 90 degres angle anything on the side of the picture is(aberations or what,maybe lens is low quality on g3 idon`t know about quality of the lens on g3)Barrel Distortion i mean yeah what can i test?Pinchusion distortion on zoom thats simptom.How can i test this simptom??? etc.......There is a problem or what?
http://www.canonfd.com/lenswork/lenswork028.htm
Thanks a lot everybody!!!

[hypokondriak]

It sounds like a problem to me - definitely not typical behavior. Have you cleaned the lens thoroughly? Does the glass appear even and smooth?

[DJSP]

Yes the lens is clean i dont know did you have this problem and what kind of test you prefered???
thanks.

[Andy_T]

Hi,

You should be able to test whether your camera has an extended amount of barrel distortion by

- photographing a structure like a brick wall (or the fence in the link you included)
- from a tripod that is adjusted parallel to the object

Normally, distortions occur if you photograph straight lines at an angle, especially in wide angle. There are special lenses that can correct this, (e.g. shift lenses), but they are normally quite expensive and make sense only if you do a lot of architeture work.

Try photographing a house (e.g. upward shoot ata churchtower) that fills the screen at full wide angle (e.g. 35 mm in 35 mm equivalent). You will get distortion.

If you photograph the same tower from a greater distance, with full zoom (e.g. 135 mm in 35 mm equivalent), the distortion should be much smaller.

Regards,
Andy

[DJSP]

Normally, distortions occur if you photograph straight lines at an angle, especially in wide angle.





Yes that i like to hear thanks a lot.huh i mean my g3 is bad.
Thanks Andythaler i mean is this.

[DJSP]

Is there on some model(g3),or eos and non digital more or less optical aberation much higher and what optical lens quality(CANON LENS) is on g3 i hear that is from eos 10d but i think that`s not??

[Switch]

DJSP wrote:
I capture the image but i view on the side of the picture and on LCD display curve on the picture did is normal or aberations or what problem or not how i test optics test?need help?
thx a lot!


hehe
wow