Parfocal distance

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sombre
Posts: 13
Joined: Mon Jul 30, 2018 8:14 am

Parfocal distance

#1 Post by sombre » Tue Jan 05, 2021 1:42 pm

I am thinking of attaching a BH2-KP intermediate polarising attachment to my Olympus BH2/BHS.
My question is, as this fits between the optics and the eye peices / trinocular camera attachment,
will it effect the parfocal distance, and if so how do I rectify the problem.?

Many Thanks,
In anticipation
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Scarodactyl
Posts: 2804
Joined: Sat Mar 03, 2018 9:09 pm

Re: Parfocal distance

#2 Post by Scarodactyl » Tue Jan 05, 2021 4:03 pm

No, there are lenses built in to compensate for that. On some accessories this adds a small extra magnification factor.
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PeteM
Posts: 3028
Joined: Tue Dec 06, 2016 6:22 am
Location: N. California

Re: Parfocal distance

#3 Post by PeteM » Tue Jan 05, 2021 9:57 pm

Typically a 1.25x magnification addition.
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