try to make some photographs with the lens wide open, the aperture should not close then. If the aperture is at fault, it would be correctly exposed. If it is still over exposed, there must be something else wrong.
On Monday 28 June 2004 21:24, alexanderkrohe wrote: FJW> Mark wrote: FJW> FJW> > This was my first outing using the DA16-45 and FJW> F70-210 & FA50. I was really shocked FJW> > at the difference. FJW> > FJW> > FJW> http://www.cmstringer.com/pentaxtest/DA16-45/index.html FJW> > FJW> > Just looking at the thumbnails for each folder shows FJW> the difference. FJW> > FJW> > Gallery2 from through-the-lens.net is fun. Didn't FJW> take long to throw this together. FJW> > FJW> > Mark Stringer FJW> FJW> From looking a the pictures I would assume that FJW> 1) the camera meter is not to blame as the pictures FJW> taken with other lenses appear to be properly exposed FJW> 2)all the pix taken with the DA 16-45 lens appear to FJW> be overexposed at about the same amount, independent FJW> from the aperture/shutter speed setting the camera has FJW> chosen. IMO this makes a a mechanical failure of the FJW> diaphragm (such as sluggish closure of the aperture FJW> etc.) less probable. Rather it looks as if the lens FJW> would close down to an aperture values that is FJW> constantly +1EV (or so) too large. So this could have FJW> something to do with the data transmission (i.e. the FJW> camera reads a wrong open aperture) or with the FJW> calibration of the aperture mechanism/electronics of FJW> the lens (the camera reads a wrong stopped down FJW> aperture) or something like that. FJW> FJW> Did you try cleaning the electrical contacts ? If this FJW> does not help it is IMO clear that the lens is faulty. FJW> My advice: Take the lens back to the store or send it FJW> directly to the service (when you send back the lens FJW> it is important that that you describe the problem FJW> accurately and also include images or image files - FJW> this helps the technician to understand the problem) . FJW> The lens is still under warranty. Or better if you FJW> desperately need this lens insist on a replacement FJW> sample (that is what I would do). FJW> FJW> my 2c FJW> Alexander FJW> FJW> FJW> FJW> FJW> FJW> FJW> __________________________________ FJW> Do you Yahoo!? FJW> New and Improved Yahoo! Mail - 100MB free storage! FJW> http://promotions.yahoo.com/new_mail FJW> FJW> FJW> -- Frits W�thrich
