Yes, our 645N does this....however, never had a film flatness problem
with a range of lenses...Not the 120 F4 tho..
On a side note....did have something happen just this week that we have
never experienced before....It will only be of interest to roll film
users however.....When sending 3 rolls to the lab, apparently, Fed X
must have dropped something pretty heavy onto our package...which was on
a Fed X letter carrier...we have used these alot before...the outcome
was that two of the spool ends were broken and since the lab would have
no way of knowing this, when they took the film out of the package,
voila....fogging on sporatic frames within both of those rolls, the
third roll was not damaged and had no fogging...
I guess the morale of the story is to put the rolls into a harden
container like a corrugated box etc....
Live and learn...glad it wasn't a wedding but still have to do those
frames over...
Larry
Pål Jensen wrote:
>
> I need help.
> Can those of you who own a 645n (or 645), remove the film magazine, set the camera
>at "B" and see if the cog wheel on the left side of the film chamber (the one that
>transport the film) moves slightly clock-wise when the shutter opens and the mirror
>goes up (when the the shutter closes the wheel turn counter clock-wise and transport
>the film). Note that this is when the shutter opens. I need to know if this behavious
>is normal or if it stays perfectly still when the shutter opens.
>
> The reason is that I still have sharpness problems due to film flatness issues.
>Pentax have checked the camera but everything is within factory specifications. My
>latest films included bracketed shots where one had the lower third of the image out
>of focus while the rest was sharp. This was at F:11 with the 120mm at infinity.
> Most of my time exposed aurora shots at F.4 was unsharp to a variable degree. The
>most extreme (45mm at F:4) had the star trails convex upwards(!), something that can
>only be due to a curved film.
>
> Pentax will hopefully send me a new film magazine soon but I'm not convinced that
>this is where the problem lies. This slight clock-wise movement, wich might be normal
>for all I know, slackens the film somewhat.
>
> Pål
>
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