Plus lenses effect on stereobase calcs.

[T3D Steve Owsley <scooter@xxxxxxxxxx>]

I'm doing some tabletop closeup work.   I often use the 1/30 'rule' and also
use the excel spreadsheet as well to tell me how much lens separation is
allowable to get acceptable on film-deviation.

What effect does using plus lenses have (say +1, +2, +4 on a 50mm lens) when
it comes to inputing data in the PCMafod spreadsheet?  Should I be making
adjustments?  Will this throw off my allowable stereobase calculations
significantly?  My guess is yes.

My reference books don't seem to answer this question.

I hope this question has not been discussed before in detail,  if so,
someone kindly direct me to the archives!

Steve Owsley.


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End of TECH3D Digest 50
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