How to test one lens against another ?

spystyle · 01-23-2011, 05:33 PM

Hello from Maine

I will soon have a Sears (Chinon) k-mount 135/2.8 and a Vivitar (Komine) screw-mount 135/2.8 lens.

I don't need both, how do you recommend I test them against each other ?

Two lenses enter, only one leaves

Thanks,
Craig

RioRico · 01-23-2011, 05:44 PM

There are the old Brick Wall and Bookshelf tests: these will let you compare resolution, edge sharpness, etc.

There's the Head Against Sparkly Background shootout: this lets you compare bokeh, punch / dimensionality, etc.

I always shoot an impromptu Light Near Bright Edges test: this quickly displays fringing and color aberrations.

Or you can just wander around with each for a day or three, shooting whatever, and see which one works best for you.

**Just1MoreDave** · 01-23-2011, 05:47 PM

I do it this way:

https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/68032-135mm-le...imes-zoom.html

Which features one of the lenses you have but not the other. Offhand, my guess is those two are going to be close. I had a couple of the Sears 135s with very oily apertures, but fixed and sold them before my big test.

It's not necessary to test like that. You can just use the lenses and see if they work for you. You only have to satisfy yourself.

clockwork247 · 01-23-2011, 10:01 PM

Originally posted by spystyle

Hello from Maine

I will soon have a Sears (Chinon) k-mount 135/2.8 and a Vivitar (Komine) screw-mount 135/2.8 lens.

I don't need both, how do you recommend I test them against each other ?

Two lenses enter, only one leaves

Thanks,
Craig

check out the review website, all they do is setup a table with stuff (juice box, fruit ect...), take pictures at different aperture, and compare, those are in the same FL so it should be easy, mount on a tripod and start the tests.

01-23-2011, 05:33 PM	#1
spystyle Veteran Member Join Date: Mar 2009 Location: Maine, USA Posts: 424	How to test one lens against another ? Hello from Maine I will soon have a Sears (Chinon) k-mount 135/2.8 and a Vivitar (Komine) screw-mount 135/2.8 lens. I don't need both, how do you recommend I test them against each other ? Two lenses enter, only one leaves Thanks, Craig

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01-23-2011, 05:44 PM	#2
RioRico Veteran Member Join Date: Jun 2008 Location: Limbo, California Posts: 11,263	There are the old Brick Wall and Bookshelf tests: these will let you compare resolution, edge sharpness, etc. There's the Head Against Sparkly Background shootout: this lets you compare bokeh, punch / dimensionality, etc. I always shoot an impromptu Light Near Bright Edges test: this quickly displays fringing and color aberrations. Or you can just wander around with each for a day or three, shooting whatever, and see which one works best for you.

01-23-2011, 05:47 PM	#3
Just1MoreDave Site Supporter Join Date: Feb 2007 Location: Aurora, CO Photos: Gallery \| Albums Posts: 6,340	I do it this way: https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/68032-135mm-le...imes-zoom.html Which features one of the lenses you have but not the other. Offhand, my guess is those two are going to be close. I had a couple of the Sears 135s with very oily apertures, but fixed and sold them before my big test. It's not necessary to test like that. You can just use the lenses and see if they work for you. You only have to satisfy yourself.

01-23-2011, 10:01 PM	#4
clockwork247 Veteran Member Join Date: Nov 2010 Location: San Diego, CA Posts: 360	Originally posted by spystyle Hello from Maine I will soon have a Sears (Chinon) k-mount 135/2.8 and a Vivitar (Komine) screw-mount 135/2.8 lens. I don't need both, how do you recommend I test them against each other ? Two lenses enter, only one leaves Thanks, Craig check out the review website, all they do is setup a table with stuff (juice box, fruit ect...), take pictures at different aperture, and compare, those are in the same FL so it should be easy, mount on a tripod and start the tests.