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06-05-2011, 08:10 PM   #1
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Focussing a 55-100mm Zoom on a P67ii body


I recently was fortunate enough to be able to pick up a 55-100mm Zoom lens for my Pentax 67 II camera. This is my first zoom lens for the camera and I'm very much looking forward to using it after hearing very positive things about its quality.

Most of my photography with the Pentax 67ii is Landscape work and my main lenses were the 45mm, 55mm, 75mm and 105mm. I expect the 55-100mm zoom to replace 3 of these lenses in my bag. However I have a question regarding how best to focus the zoom lens. As most of my work is in landscape I am almost always looking to maximize depth of field without losing too much sharpness. I found pretty much all the primes mentioned to be great quality even stopped down to f22. I couldn't really see any softness introduced by diffraction, etc.... When focussing the primes I would use the lens barrel to put the infinity mark just between 22 and 16 on the left side in order to maximize depth of field (assuming I had a shot which included a far horizon/mountain, etc).

Now my question is what should my technique be for obtaining maximum depth of field with the 55-100mm zoom? I don't believe I can now use the lens barrel to see what the limits of the focus are going to be. Should I now rely on adding hyperfocal distance 'markers' to the lens at various focal lengths?

Any opinions on what approaches are available would be much appreciated !

Cheers, Rick

06-08-2011, 10:13 AM   #2

Join Date: Feb 2008
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Desertscape has devised a DOF guide for the 67 zoom. Try to pm him directly
06-08-2011, 12:28 PM   #3

Join Date: Jul 2009
Location: Seattle
Posts: 7,781
I wish I had the 55-100mm zoom so I could offers some advise.
06-08-2011, 10:06 PM   #4
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Join Date: Jul 2010
Location: Hong Kong
Posts: 38
Original Poster

Great, thanks!

Will try and pm him...

Yes, tuco, it took me many moons to track one of these down... eventually foundd one in a camera shop in London. They told me that it had literally been dropped off by the previous hour a couple of hours before I arrived. They hadn't even had a chance to put a price tag on it... They knew it would be picked up quick by a 67 owner!


06-09-2011, 07:57 AM   #5

Join Date: Feb 2009
Location: Arizona
Posts: 1,025
See my post. Yes, I'm the same person. Good luck with your hyperfocal dots.

06-09-2011, 08:10 AM   #6
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Join Date: Jul 2010
Location: Hong Kong
Posts: 38
Original Poster
Ahhhhh... So you are!

I see... You're THAT Steve ! All makes sense now !

Thanks for your advice,


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