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10-29-2012, 01:05 PM   #1
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To high demands on focus?

Hello.
Have been using my K-5 for 6 months, but find it difficult to get good focus. Have allready got a Katzeye prism screen - skipping autofocus all together.

Im using a manual M 1:2 85mm lens for most of my pictures. Keeping aperture at 2 - 4.5.

Finding focus at long distance is tricky (8meters and up). It often takes 20-30 pics to get one focus where I want it. Is this something I have to get use to if I use fast lenses at long distance?

I'm a beginner when it comes to dslrs - do I have to high expectations?
How many pictures do You need to get this right??

I often end up taking a few extra pics with random focus, just in case...

Thanks

10-29-2012, 01:08 PM   #2
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Join Date: Oct 2008
Location: Frisco Texas
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Maybe your Katzeye screen needs shims. It could be off in accuracy.
10-29-2012, 01:18 PM   #3
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Join Date: Mar 2012
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Original Poster
Yes - I agree. It might be the catzeye that need shims. Can it be anything else?
10-29-2012, 01:43 PM   #4
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Join Date: May 2009
Location: Edmonton, AB
Posts: 246
I assume you already checked your camera/lens focus accuracy. A few options that I could think of:
* stop down a bit to Increase depth of field
* Use a different focusing screen, eg. Canon ee-S, or split prism Nikon K-3 (both need shims) to assist with your manual focus. I ordered mine from focusingscreen.com and very happy.

Regards,

Peter

10-29-2012, 01:56 PM - 1 Like   #5
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Join Date: Oct 2011
Location: Savannah, GA
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If the shims are off, it is impossible to get accurate manual focus on a fast lens through the viewfinder. Just focus on a ruler or page of text at a extreme angle with a wide aperture (so that only one number or letter or line is in focus in the viewfinder). Then take the shot and see if the actual focus is in-front of or behind that point you focused on. Then adjust shims until it is spot-on...
10-30-2012, 11:54 AM   #6
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Original Poster
Thanks every one - I will do some tests with a book or a ruler.
regards
Lars
Farmer's racer
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