[LRflex] Re: Bluedot Frustration...The solution... I think!

At 29/01/2008, you wrote:

Aram,
A problem with THIS lens as David has tried other lenses and the bluedot didn't show up so it can't be this sensor It is most certainly not the focal length - I own a 70-210 Angénieux and never noticed it on a Digital camera . So it still may be this particular lens, because it showed on the DMR AND on the R30. 
Or, more unlikely all 80/200, which Doug doesn't seem to have noticed so far.

Bien amicalement
phx



Aram, Philippe:
Philippe has a good point. The problem has occurred with this lens, when on a D20, D30 and R8+DMR.
It most likely affects all 80~200/4 Vario lenses, as it caused by the light reflected from the sensor's surface (shinier than film) being re-reflected back to the sensor by the rear element of the lens. This will only happen when circumstances are just right, and only with lenses with a rear element of suitable curvature to allow it to happen. Changing lenses, to one which has a rear element of a different curve will cure the problem. 

Cheers!
---

David Young,
Logan Lake, CANADA

Wildlife Photographs: http://www.furnfeather.net
Personal Web-pages: http://www3.telus.net/~telyt
Stock Photography at: http://tinyurl.com/2amll4

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