HassyH1 120 Macro Helicoid thread distance

[Jann Lipka]

I'm trying to figure this out .
with photography of small objects using Hassy H2 and 120 mm Macro F4  :

When stitching for extended DOF
I get different perspective , because of lens movement .

I'm trying to figure out  how to compensate for that movement by
changing distance of the camera itself placed on a macro rail .


Should I simply measure the distance that focusing ring is moving ,
or is there some formula for that .

Also

Anyone know hom many mm the lens center will move
when turning focusing ring 1 full revolution  ( 360 degrees )

Yes I know it is lens peeping ...

[Kitty]

I'm trying to figure out  how to compensate for that movement by
changing distance of the camera itself placed on a macro rail .
Should I simply measure the distance that focusing ring is moving ,
or is there some formula for that .

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I never heard there is formula to compensate this.
But I would love to learn too.
I got the same problem and my solution is Photoshop.

kitty