[MF3D.FORUM:1287] Re: Sputnik lens problem

[Richard Rylander <rlrylander@xxxxxxx>]

Paul -

If the blur is asymmetric, one or more element may be decentered.  Since
the lens diameters and retaining C-rings are not always a good match
with the Spuds, this could easily be the case.

Richard Rylander

Paul Talbot wrote:

> I'm trying to synch focus on a Sputnik and it appears one lens
> has a strange problem.  At its best focus point, the lens on
> the left is very blurred.  Looking at white writing on a blue
> background, some of the letters appear as though they have a
> trailing motion blur (like a shot with a rear curtain sync flash
> on a moving object and slow shutter speed).  A large white
> circular logo on the blue background has very poor separation
> of the white and blue areas.
>
> Anyone see this problem before?  Any guesses how to solve it?
> I've heard of problems with lens elements being installed the
> wrong way.  Could that be the cause of this problem, and how
> do I check for incorrectly installed elements?
>
> Paul Talbot