Zoom Lens: More vignetting in tele than in wide angle - Printable Version +- Opticallimits (https://forum.opticallimits.com) +-- Forum: Forums (https://forum.opticallimits.com/forumdisplay.php?fid=4) +--- Forum: Just Talk (https://forum.opticallimits.com/forumdisplay.php?fid=17) +--- Thread: Zoom Lens: More vignetting in tele than in wide angle (/showthread.php?tid=1422) |
Zoom Lens: More vignetting in tele than in wide angle - Paul1980 - 08-20-2014 Hi everybody, I am a proud owner of the Tamron 24-70 VC which I use on the Canon EOS 6d. During developing of my Holiday photos, I have discovered that some of the photos Show significant shadows in the Corners / vignetting, but mostly in the right side of the picture. All those photos had in common that they had a rather small aperture (6.3-9) and were shot towards the tele end of this lens (60-70mm). My - and probably everybody's - first guess would be a badly fitting Hood or a UV Filter... but the Problem isnt solved by removing those. Wide angle photos, even with bigger apertures, look fine and don't show asymmetrical vignetting. What could be the reason? Do i have a decentered lens? Can it be caused by the Image Stabilisation? And why is it worse in Tele than in Wide Angle? Unfortunately the weather is so bad here that I don't have the sky and light conditions to try to reproduce the Situation until now.. Looking Forward to your Input Zoom Lens: More vignetting in tele than in wide angle - Paul1980 - 08-20-2014 www.abload.de/img/img_4523rawa3kts.jpg a Picture says more than a thousand words Zoom Lens: More vignetting in tele than in wide angle - Brightcolours - 08-20-2014 Well, that does not look as "bad" as you described, and yes, it can have to do with the IS pulling the IS element to a side. Try without IS to see if there is a difference. Zoom Lens: More vignetting in tele than in wide angle - Paul1980 - 08-20-2014 thx, i will, and then i will come back to you Zoom Lens: More vignetting in tele than in wide angle - Paul1980 - 08-20-2014 http://abload.de/img/output_mjdyrjvziem.gif I think it's not a decentered lens, here are photos that i shot consecutively with activated VC.. note the Bird. It seems to be affected by a "nervous" image stabilizer plus the angle of the sun: (Sun from the back left --> more vignetting on the right side and vice versa) No VC, no hood, no filter and sun directly from the back didn't lead to any photos with this problem. So I think it is not an optical problem and rest my case. Thanks for listening anyway! |