Low tech lens testing suggestions

weasel

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Nov 25, 2006

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• Saturday at 3:50 PM

• #1

I have ended ups with 4 different LTM 50mm lenses; a 3.5 Elmar, a 1.9 Canon Serenar, a 1.5 Canon Serenar, and a j8 that has been adjusted to focus on Leica. I have shout all if these lenses, and while they do have different character, I would like to do something a bit more systematic to compare their performance.
I have no digital body to put them on.
What low tech methods do you all suggest?

 

Alan Johnson

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Nov 16, 2004

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3,301

• Saturday at 4:57 PM

• #2

I have used print outs of the 2.5mm 2003 Koren Chart. Skip all the MTF stuff and it is possible to estimate lppm resolution.
If lppm resolution is not needed just photograph the chart on film from the same distance with all lenses and compare results by your chosen method.

Lens testing

 

OP

OP

weasel

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Nov 25, 2006

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• Sunday at 7:53 AM

• #3

thank you for this

 

Ardpatrick

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Sep 7, 2023

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• Sunday at 9:52 AM

• #4

I vaguely recall that lens testing at 50x the focal length was preferential. So with a 50mm lens that would be 2.5 meters. Alignment is important and ideally use flash for illumination to avoid issues with camera shake.